Twisting single yarn stretching modeling and simulation method and device

Abstract

The invention discloses a twisted single yarn stretching modeling and simulation method, and belongs to the technical field of finite element analysis. The method comprises the steps that a geometric model of yarn to be measured is constructed, the geometric model is layered based on the fiber diameter and the section arrangement mode, model construction is conducted on the layered geometric model through ABAQUS software, and a layered yarn finite element model is obtained; calculating the twist angle of each layer of the layered yarn finite element model based on the length, the twist degree and the diameter of the concentric circle in the section of each layer; based on the twist angle of each layer, the elasticity modulus of each layer of simulated yarn of the layered yarn finite element model is obtained, and the diameter, length, twist, fiber diameter, density, fiber elasticity modulus and section arrangement mode of the yarn to be measured and the elasticity modulus of each layer of simulated yarn are input into the layered yarn finite element model for a single yarn stretching simulation experiment. According to the method, the accuracy and the simulation speed of twisted single yarn modeling are improved.

Description

Technical Field

[0001] The present application belongs to the field of finite element analysis technology, and in particular relates to a method and device for modeling and simulating twisted single yarn stretching. Background Art

[0002] With the rapid development of computers, more and more people in the industry are working on realistic simulations of textile properties. In textile simulations, yarn, as the basic unit of fabric, directly determines the final fabric simulation quality. Therefore, to promote the application of yarn in fabrics, yarn simulation has become particularly important.

[0003] Currently, there are many studies on yarn simulation, such as constructing simplified geometric models of single yarns and ply yarns, conducting tensile fracture simulation studies on ring-spun yarns, conducting tensile fracture experiments on cotton fibers, studying the effects of yarn diameter and tensile speed on fracture strength, and studying the effects of different yarn tensile lengths and tensions. Existing simulation methods are mainly of two types. One is to directly model the fiber morphology, but the modeling process is complex and the simulation calculation is slow. The other is to construct a simplified model for simulation experiments. This method has simple modeling and fast simulation calculations, but the resulting yarn mechanical properties data have large errors. Different yarns have different fiber morphologies and rich twist characteristics. Existing methods have low accuracy and slow speed when simulating yarns, and are unable to quickly characterize the mechanical properties of yarns. Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a method and apparatus for modeling and simulating twisted single yarn stretching, which improves the accuracy of modeling and simulation speed of twisted single yarn.

[0005] In a first aspect, the present application provides a method for modeling and simulating the stretching of a twisted single yarn, the method comprising:

[0006] Obtaining the diameter, length, twist, fiber diameter, density, fiber elastic modulus, and cross-sectional arrangement of the yarn to be tested, and constructing a geometric model of the yarn to be tested, wherein the yarn cross-section includes multiple concentric circles, and the cross-sectional arrangement is the fiber arrangement in the yarn cross-section;

[0007] The geometric model is layered based on the fiber diameter and cross-sectional arrangement, each concentric circle is evenly divided into preset numerical portions, and the diameter of the concentric circles in each cross-sectional layer is calculated;

[0008] The layered geometric model is constructed using ABAQUS software to obtain a layered yarn finite element model;

[0009] Calculate the twist angle of each layer of the layered yarn finite element model based on the length, twist and diameter of the concentric circles in each layer cross section;

[0010] Based on the twist angle of each layer, the elastic modulus of each layer of simulated yarn in the layered yarn finite element model is obtained. The diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement of the yarn to be tested and the elastic modulus of each layer of simulated yarn are input into the layered yarn finite element model to carry out a single yarn tensile simulation experiment to obtain single yarn tensile simulation data, which includes stress and strain.

[0011] According to one embodiment of the present application, constructing a geometric model of the yarn to be tested includes:

[0012] Obtain the diameter, length, twist, fiber diameter and cross-sectional arrangement of the yarn to be tested;

[0013] Taking the diameter of the yarn to be tested as the diameter and the length of the yarn to be tested as the height, a cylindrical model is constructed to obtain the geometric model of the yarn to be tested.

[0014] According to one embodiment of the present application, the geometric model is layered based on the fiber diameter and cross-sectional arrangement, and each concentric circle is evenly divided into preset numerical portions, including:

[0015] Construct a yarn radius formula based on the number of fiber layers, fiber radius, and yarn radius;

[0016] Obtaining the yarn radius of each layer based on the yarn radius formula;

[0017] Layering the geometric model based on the yarn radius of each layer;

[0018] Divide each concentric circle into a preset number of equal parts based on the angle.

[0019] According to one embodiment of the present application, the calculation of the twist angle of each layer of the layered yarn finite element model based on the length, twist and diameter of the concentric circles in each layer cross section includes:

[0020] Based on the length, twist and the diameter of the concentric circles in each layer cross section, the twist angle of each layer of the layered yarn finite element model is obtained by the twist angle calculation formula. The twist angle calculation formula is as follows:

[0021] β i =tan -1 (2πR i ×T tex ÷h)

[0022] Among them, β i is the twist angle of the i-th layer, R i is the radius of the concentric circle in the i-th layer section, T tex is the number of twist turns and h is the yarn length.

[0023] According to one embodiment of the present application, obtaining the elastic modulus of each layer of simulated yarn in the layered yarn finite element model based on the twist angle of each layer includes:

[0024] Based on the twist angle and fiber elastic modulus of each layer, the elastic modulus of each layer of the simulated yarn in the layered yarn finite element model is obtained by the elastic modulus calculation formula. The elastic modulus calculation formula is as follows:

[0025] E i =cosβ i 4 E0

[0026] Among them, E i is the elastic modulus of the simulated yarn in the i-th layer, β i is the twist angle of the i-th layer, and E0 is the fiber elastic modulus.

[0027] According to one embodiment of the present application, the method of inputting the diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement, and elastic modulus of each layer of simulated yarn of the yarn to be tested into a layered yarn finite element model to perform a single yarn tensile simulation experiment includes:

[0028] Meshing the layered yarn finite element model, setting constraints and analysis steps, wherein the constraints are that one end is fixed and the other end is stretched;

[0029] The diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement and elastic modulus of each layer of simulated yarn of the yarn to be tested are input into the layered yarn finite element model to carry out single yarn tensile simulation experiments.

[0030] According to one embodiment of the present application, the method further includes:

[0031] Draw stress-strain curve based on stress and strain;

[0032] The total elastic modulus of the yarn to be tested was calculated based on the stress-strain curve.

[0033] In a second aspect, the present application provides a twisted single yarn stretching modeling and simulation device, the device comprising:

[0034] An acquisition module is used to acquire the diameter, length, twist, fiber diameter, density, fiber elastic modulus and cross-sectional arrangement of the yarn to be tested, and construct a geometric model of the yarn to be tested, wherein the yarn cross-section includes multiple concentric circles, and the cross-sectional arrangement is the fiber arrangement in the yarn cross-section;

[0035] A first processing module is configured to divide the geometric model into layers based on the fiber diameter and cross-sectional arrangement, divide each concentric circle into a preset number of equal parts, and calculate the diameter of the concentric circles in each cross-sectional layer;

[0036] The second processing module is used to construct a model of the layered geometric model using ABAQUS software to obtain a layered yarn finite element model;

[0037] a third processing module for calculating the twist angle of each layer of the layered yarn finite element model based on the length, twist, and diameter of concentric circles in the cross section of each layer;

[0038] The simulation module is used to obtain the elastic modulus of each layer of simulated yarn in the layered yarn finite element model based on the twist angle of each layer, and input the diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement and elastic modulus of each layer of simulated yarn of the yarn to be tested into the layered yarn finite element model to perform a single yarn tensile simulation experiment to obtain single yarn tensile simulation data, which includes stress and strain.

[0039] In a third aspect, the present application provides an electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the twisted single yarn stretching modeling and simulation method as described in the first aspect above is implemented.

[0040] In a fourth aspect, the present application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the twisted single yarn stretching modeling and simulation method as described in the first aspect above.

[0041] In a fifth aspect, the present application provides a chip comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the twisted single yarn stretching modeling and simulation method as described in the first aspect.

[0042] In a sixth aspect, the present application provides a computer program product, comprising a computer program, which, when executed by a processor, implements the twisted single yarn stretching modeling and simulation method as described in the first aspect above.

[0043] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application.

[0044] The present invention provides a twisted single yarn stretching modeling and simulation method, which has the following beneficial effects compared with the prior art:

[0045] (1) The present invention constructs a geometric model of the yarn by obtaining the diameter, length, twist, fiber diameter, density, fiber elastic modulus and cross-sectional arrangement of the yarn to be tested, and performs finite element analysis and simulation experiments on the geometric model through ABAQUS software, which effectively improves the accuracy of single yarn tensile simulation. The elastic modulus of the yarn is calculated by the twist angle and input into the layered yarn finite element model for single yarn tensile simulation experiment, which improves the convergence of the layered yarn finite element model and reduces the simulation error rate. It can quickly characterize the influence of yarn twisting characteristics on yarn mechanical properties, can quickly simulate yarn performance, and reflect the internal performance of the yarn, laying a foundation for studying the influence of twisting characteristics on yarn performance.

[0046] (2) The present invention calculates the yarn radius of each layer by constructing a yarn radius formula and performs layered processing on the geometric model, which can more conveniently express the stress gradient of the yarn, make the influence of material properties on yarn performance more obvious, and realize the rapid simulation of the tensile performance of twisted single yarn.

[0047] (3) The present invention calculates the elastic modulus of each layer of simulated yarn based on the twist angle and fiber elastic modulus of each layer and adopts the elastic modulus calculation formula, thereby effectively improving the simulation accuracy of the tensile performance of the single yarn. By calculating the elastic modulus of each layer of yarn and inputting it into the layered yarn finite element model for tensile simulation, the twisting characteristics can be reflected more accurately in the yarn simulation model, thereby improving the calculation accuracy of the yarn simulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0049] Figure 1 1 is a flow chart of a method for modeling and simulating the stretching of a twisted single yarn provided in an embodiment of the present application;

[0050] Figure 2 Schematic diagram of the structure of the yarn cross section provided in the embodiment of the present application;

[0051] Figure 3 Schematic diagram of the structure of the layered yarn finite element model provided in the embodiment of the present application;

[0052] Figure 4 This is a structural diagram of the material direction provided in the embodiment of the present application;

[0053] Figure 5 Schematic diagram of the geometric model of the yarn to be tested provided in the embodiment of the present application;

[0054] Figure 6 is a schematic diagram of a stress-strain curve provided in an embodiment of the present application;

[0055] Figure 7 is a stress cloud diagram of yarn simulation provided in an embodiment of the present application;

[0056] Figure 8 Schematic diagram of yarn tensile fracture experiment provided in the embodiment of the present application;

[0057] Figure 9 This is a comparison chart of tensile breaking strength-time of yarns with different twists provided in the examples of the present application;

[0058] Figure 10 Schematic diagram of the structure of the twisted single yarn stretching modeling and simulation device provided in an embodiment of the present application;

[0059] Figure 11 It is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0060] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0061] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0062] Below, in combination with the accompanying drawings, the twisted single yarn stretching modeling and simulation method, twisted single yarn stretching modeling and simulation device, electronic device and readable storage medium provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0063] The twisted single yarn stretching modeling and simulation method can be applied to a terminal, and can be specifically executed by hardware or software in the terminal.

[0064] The terminal includes, but is not limited to, a portable communication device such as a mobile phone or tablet computer having a touch-sensitive surface (e.g., a touch screen display and / or a touch pad). It should also be understood that, in some embodiments, the terminal may not be a portable communication device, but a desktop computer having a touch-sensitive surface (e.g., a touch screen display and / or a touch pad).

[0065] In the following embodiments, a terminal including a display and a touch-sensitive surface is described. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, a mouse, and a joystick.

[0066] The embodiment of the present application provides a method for modeling and simulating the stretching of a twisted single yarn. The execution subject of the method can be an electronic device or a functional module or functional entity in the electronic device that can implement the method for modeling and simulating the stretching of a twisted single yarn. The electronic devices mentioned in the embodiment of the present application include but are not limited to mobile phones, tablet computers, computers, cameras and wearable devices, etc. The following describes the method for modeling and simulating the stretching of a twisted single yarn provided in the embodiment of the present application by taking the electronic device as an example of the execution subject.

[0067] Figure 1 Schematic diagram of the process of modeling and simulating the twisted single yarn stretching method provided in the embodiment of the present application. Figure 1 As shown, the twisted single yarn stretching modeling and simulation method includes: step 110, step 120, step 130, step 140 and step 150.

[0068] Step 110: Obtain the diameter, length, twist, fiber diameter, density, fiber elastic modulus, and cross-sectional arrangement of the yarn to be tested, and construct a geometric model of the yarn to be tested, wherein the yarn cross-section includes multiple concentric circles, and the cross-sectional arrangement is the fiber arrangement in the yarn cross-section;

[0069] It is easy to understand that the yarn to be tested is obtained, and the diameter, length, twist, fiber diameter and cross-sectional arrangement of the yarn are measured by measuring tools, and the geometric model of the yarn to be tested is constructed with the yarn diameter as the diameter and the yarn length as the height.

[0070] Step 120: Layering the geometric model based on the fiber diameter and cross-sectional arrangement, dividing each concentric circle into a preset number of equal parts, and calculating the diameter of the concentric circles in each cross-sectional layer;

[0071] For example, the geometric model is layered according to the diameter of each fiber and the fiber arrangement in the yarn cross section. Figure 2 Schematic diagram of the cross section of the yarn provided in the embodiment of the present application. Figure 2As shown, the yarn cross section is divided into multiple concentric circles. The diameter of each concentric circle gradually increases according to the fiber diameter and fiber arrangement. The diameter of each layer of concentric circles in the geometric model is calculated, and then each concentric circle is divided into 20 parts, each with an angle of 18 degrees.

[0072] Step 130: constructing the layered geometric model using ABAQUS software to obtain a layered yarn finite element model;

[0073] Further, Figure 3 Schematic diagram of the structure of the layered yarn finite element model provided in the embodiment of the present application. Figure 3 As shown, according to the concentric circle diameter of each layer of the yarn geometric model, the radius of each layer is input into the numerical simulation software ABAQUS to construct the model and layer it, and a layered yarn finite element model is obtained.

[0074] Step 140: Calculate the twist angle of each layer of the layered yarn finite element model based on the length, twist, and diameter of the concentric circles in each layer cross section;

[0075] In some embodiments, the step of calculating the twist angle of each layer of the layered yarn finite element model based on the length, twist, and diameter of concentric circles in each layer cross section comprises:

[0076] Based on the length, twist and the diameter of the concentric circles in each layer cross section, the twist angle of each layer of the layered yarn finite element model is obtained by the twist angle calculation formula. The twist angle calculation formula is as follows:

[0077] β i =tan -1 (2πR i ×T tex ÷h)

[0078] Among them, β i is the twist angle of the i-th layer, R i is the radius of the concentric circle in the i-th layer section, T tex is the number of twist turns and h is the yarn length.

[0079] The formula for calculating the number of twist turns is as follows:

[0080] T tex =T÷h

[0081] Where T is the yarn twist and h is the yarn length.

[0082] In this embodiment, the twist angle of each layer of yarn is calculated by using the twist angle calculation formula based on the length, twist of the yarn and the diameter of the concentric circles in each cross section, which effectively improves the simulation accuracy of the yarn tensile performance, can more accurately simulate the mechanical properties of the yarn, make the yarn tensile simulation process more accurate, and improve the simulation accuracy.

[0083] Step 150: Obtain the elastic modulus of each layer of simulated yarn in the layered yarn finite element model based on the twist angle of each layer, input the diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement of the yarn to be tested, and the elastic modulus of each layer of simulated yarn into the layered yarn finite element model to perform a single yarn tensile simulation experiment, and obtain single yarn tensile simulation data, wherein the single yarn tensile simulation data includes stress and strain.

[0084] In some embodiments, obtaining the elastic modulus of each layer of simulated yarn in the layered yarn finite element model based on the twist angle of each layer includes:

[0085] Based on the twist angle and fiber elastic modulus of each layer, the elastic modulus of each layer of the simulated yarn in the layered yarn finite element model is obtained by the elastic modulus calculation formula. The elastic modulus calculation formula is as follows:

[0086] E i =cosβ i 4 E0

[0087] Among them, E i is the elastic modulus of the simulated yarn in the i-th layer, β i is the twist angle of the i-th layer, and E0 is the fiber elastic modulus.

[0088] In this embodiment, the elastic modulus of each layer of simulated yarn is calculated by using the elastic modulus calculation formula based on the twist angle and fiber elastic modulus of each layer, thereby effectively improving the simulation accuracy of the tensile performance of the single yarn. By calculating the elastic modulus of each layer of yarn and inputting it into the layered yarn finite element model for tensile simulation, the twisting characteristics can be reflected more accurately in the yarn simulation model, thereby improving the calculation accuracy of the yarn simulation.

[0089] Finally, the diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement of the yarn to be tested, and the elastic modulus of each layer of simulated yarn are input into the layered yarn finite element model. The layered yarn finite element model is meshed and constraint conditions are set. Figure 4 This is a schematic diagram of the structure of the material direction provided in the embodiment of the present application, such as Figure 4 As shown in the figure, according to the anisotropy of the mechanical properties of the fiber material, the material direction and other parameters of each model are set to carry out a single yarn stretching simulation experiment.

[0090] According to the twisted single yarn stretching modeling and simulation method provided in the embodiments of the present application, a geometric model of the yarn is constructed by obtaining the diameter, length, twist, fiber diameter, density, fiber elastic modulus and cross-sectional arrangement of the yarn to be tested, and finite element analysis and simulation experiments are performed on the geometric model through ABAQUS software, which effectively improves the accuracy of the single yarn stretching simulation. The elastic modulus of the yarn is calculated by the twist angle and input into the layered yarn finite element model for single yarn stretching simulation experiments, which improves the convergence of the layered yarn finite element model and reduces the simulation error rate. It can quickly characterize the influence of yarn twisting characteristics on yarn mechanical properties, can quickly simulate yarn performance, and reflect the internal performance of the yarn, laying the foundation for studying the influence of twisting characteristics on yarn performance.

[0091] In some embodiments, constructing a geometric model of the yarn to be tested includes:

[0092] Obtain the diameter, length, twist, fiber diameter and cross-sectional arrangement of the yarn to be tested;

[0093] Taking the diameter of the yarn to be tested as the diameter and the length of the yarn to be tested as the height, a cylindrical model is constructed to obtain the geometric model of the yarn to be tested.

[0094] It is easy to understand that the diameter of the yarn to be tested is taken as the diameter, the length of the yarn to be tested is taken as the height, and a cylindrical model is constructed to obtain the geometric model of the yarn to be tested. Figure 5 is a schematic structural diagram of the geometric model of the yarn to be tested provided in the embodiment of the present application, such as Figure 5 As shown, Figure 5 (a) is a schematic diagram of the geometric model of the yarn to be tested. Figure 5 (b) is a schematic diagram of the twist angle of the yarn to be tested.

[0095] In this embodiment, by obtaining the diameter, length, twist, fiber diameter and cross-sectional arrangement of the yarn to be tested, and constructing a cylindrical model with the diameter and length of the yarn as parameters, the geometric properties of the yarn to be tested can be more accurately characterized, which facilitates the subsequent prediction of the correlation between the twisting structure characteristics and the tensile modulus of the single yarn, making subsequent simulation calculations more accurate.

[0096] In some embodiments, the geometric model is layered based on the fiber diameter and cross-sectional arrangement, and each concentric circle is evenly divided into preset numerical portions, including:

[0097] Construct a yarn radius formula based on the number of fiber layers, fiber radius, and yarn radius;

[0098] Obtaining the yarn radius of each layer based on the yarn radius formula;

[0099] Layering the geometric model based on the yarn radius of each layer;

[0100] Divide each concentric circle into a preset number of equal parts based on the angle.

[0101] It is easy to understand that the geometric model is divided into i layers according to the fiber diameter and fiber arrangement. The layering formula is as follows:

[0102]

[0103] Where D is the yarn diameter, r is the fiber radius, and i is the number of layers.

[0104] Furthermore, a yarn radius formula is constructed based on the number of fiber layers, fiber radius, and yarn radius. The calculation formula is as follows:

[0105] R i =(2i-1)×r

[0106] Where i is the number of fiber layers, r is the fiber radius, R i is the radius of the yarn in layer i.

[0107] In this embodiment, by constructing a yarn radius formula to calculate the yarn radius of each layer and performing layered processing on the geometric model, the stress gradient of the yarn can be more conveniently represented, the influence of material properties on yarn performance can be more obvious, and rapid simulation of the tensile properties of twisted single yarn can be achieved.

[0108] In some embodiments, the step of inputting the diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement, and elastic modulus of each layer of simulated yarn of the yarn to be tested into a layered yarn finite element model to perform a single yarn tensile simulation experiment includes:

[0109] Meshing the layered yarn finite element model, setting constraints and analysis steps, wherein the constraints are that one end is fixed and the other end is stretched;

[0110] The diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement and elastic modulus of each layer of simulated yarn of the yarn to be tested are input into the layered yarn finite element model to carry out single yarn tensile simulation experiments.

[0111] For example, the layered yarn finite element model is meshed in ABAQUS, and 78,000 C3D8R type meshes are divided. The model is divided into 20 parts and the material directions are marked according to the anisotropy of the yarn material. The constraint conditions of the model are set, one end is fixed and the other end is stretched, the overall strain is 20%, and appropriate analysis steps are set to carry out single yarn stretching simulation experiments.

[0112] In this embodiment, by inputting various data of the yarn to be tested into the layered yarn finite element model to carry out a single yarn stretching simulation experiment, combined with the grid division, constraint condition setting and analysis step setting, the behavior of the yarn during the stretching process can be simulated more accurately, the simulation speed is improved, and the rapid characterization of the mechanical properties of the single yarn by the yarn twisting characteristics and fiber material properties is achieved.

[0113] In some embodiments, the method further comprises:

[0114] Draw stress-strain curve based on stress and strain;

[0115] The total elastic modulus of the yarn to be tested was calculated based on the stress-strain curve.

[0116] For example, the single yarn stretching simulation data is recorded, and the stress-strain curve is drawn according to the stress gradient in the model. Figure 6 is a schematic diagram of the stress-strain curve provided in the embodiment of the present application, such as Figure 6 As shown in the figure, according to the stress-strain curve, the stress during the yarn stretching simulation is calculated using the stress formula:

[0117]

[0118] Where σ is stress, F is force, and S is the cross-sectional area of ​​the yarn.

[0119] The strain in the yarn stretching simulation process is calculated using the strain formula, which is as follows:

[0120]

[0121] Where ε is the strain, Δ h is the stretched length and h is the yarn length.

[0122] Figure 7 This is a stress cloud diagram of yarn simulation provided by the embodiment of the present application, such as Figure 7 As shown in the figure, the stress change of yarn during yarn stretching is studied based on the single yarn stretching simulation stress cloud diagram, and the elastic modulus of the whole yarn is calculated. The calculation formula is as follows:

[0123]

[0124] Among them, E 总 is the total elastic modulus.

[0125] Figure 8 Schematic diagram of the yarn tensile fracture experiment provided in the embodiment of the present application. Figure 8 As shown, tensile breaking tests of yarns with various twists were conducted, and the breaking strengths of the tensile breaking tests of yarns with various twists were recorded. Figure 9This is a comparison chart of tensile breaking strength-time of yarns with different twists provided in the examples of the present application, such as Figure 9 As shown, the maximum breaking strength is obtained according to the breaking strength-time comparison diagram, and the actual stress is obtained based on the maximum breaking strength. The calculation formula is as follows:

[0126]

[0127] Among them, σ0 is the actual stress, F0 is the maximum breaking strength, and S0 is the actual cross-sectional area.

[0128] The actual strain is calculated as follows:

[0129]

[0130] Where ε0 is the actual strain and h0 is the actual length of the yarn.

[0131] The actual elastic modulus is obtained according to the actual strain and actual stress. The calculation formula is as follows:

[0132]

[0133] The total elastic modulus obtained by simulation is compared with the actual elastic modulus to verify the feasibility and accuracy of this method.

[0134] In this embodiment, by drawing a stress-strain curve and calculating the total elastic modulus of the yarn to be tested based on it, the mechanical properties of the yarn during the stretching process can be evaluated more accurately, effectively improving the calculation accuracy of the yarn elastic modulus.

[0135] The twisted single yarn stretching modeling and simulation method provided in the embodiments of the present application can be executed by a twisted single yarn stretching modeling and simulation device. In the embodiments of the present application, the twisted single yarn stretching modeling and simulation device is used as an example to illustrate the twisted single yarn stretching modeling and simulation method provided in the embodiments of the present application.

[0136] The present application also provides a twisted single yarn stretching modeling and simulation device, such as Figure 10 As shown, the twisted single yarn tensile modeling and simulation device includes: an acquisition module 1010 , a first processing module 1020 , a second processing module 1030 , a third processing module 1040 and a simulation module 1050 .

[0137] An acquisition module 1010 is configured to acquire the diameter, length, twist, fiber diameter, density, fiber elastic modulus, and cross-sectional arrangement of the yarn to be tested, and construct a geometric model of the yarn to be tested, wherein the yarn cross-section includes a plurality of concentric circles, and the cross-sectional arrangement is the fiber arrangement in the yarn cross-section;

[0138] A first processing module 1020 is configured to divide the geometric model into layers based on the fiber diameter and cross-sectional arrangement, divide each concentric circle into a preset number of equal parts, and calculate the diameter of the concentric circles in each cross-sectional layer;

[0139] The second processing module 1030 is used to construct a model of the layered geometric model using ABAQUS software to obtain a layered yarn finite element model;

[0140] A third processing module 1040 is configured to calculate the twist angle of each layer of the layered yarn finite element model based on the length, twist, and diameter of the concentric circles in each layer cross section;

[0141] Simulation module 1050 is used to obtain the elastic modulus of each layer of simulated yarn in the layered yarn finite element model based on the twist angle of each layer, and input the diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement and elastic modulus of each layer of simulated yarn of the yarn to be tested into the layered yarn finite element model to perform a single yarn tensile simulation experiment to obtain single yarn tensile simulation data, which includes stress and strain.

[0142] According to the twisted single yarn stretching modeling and simulation method provided in the embodiments of the present application, a geometric model of the yarn is constructed by obtaining the diameter, length, twist, fiber diameter, density, fiber elastic modulus and cross-sectional arrangement of the yarn to be tested, and finite element analysis and simulation experiments are performed on the geometric model through ABAQUS software, which effectively improves the accuracy of the single yarn stretching simulation. The elastic modulus of the yarn is calculated by the twist angle and input into the layered yarn finite element model for single yarn stretching simulation experiments, which improves the convergence of the layered yarn finite element model and reduces the simulation error rate. It can quickly characterize the influence of yarn twisting characteristics on yarn mechanical properties, can quickly simulate yarn performance, and reflect the internal performance of the yarn, laying the foundation for studying the influence of twisting characteristics on yarn performance.

[0143] The twisted single yarn stretching modeling and simulation device provided in the embodiment of the present application can achieve Figures 1 to 9 To avoid repetition, the various processes implemented in the embodiment of the twisted single yarn stretching modeling and simulation method are not described here.

[0144] In some embodiments, as Figure 11 As shown, an embodiment of the present application also provides an electronic device 1100, including a processor 1101, a memory 1102, and a computer program stored in the memory 1102 and executable on the processor 1101. When the program is executed by the processor 1101, each process of the above-mentioned twisted single yarn stretching modeling and simulation method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0145] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0146] An embodiment of the present application also provides a non-transitory computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the various processes of the above-mentioned twisted single yarn stretching modeling and simulation method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0147] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0148] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the above-mentioned twisted single yarn stretching modeling and simulation method.

[0149] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0150] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, which is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-mentioned twisted single yarn stretching modeling and simulation method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0151] It should be understood that the chip mentioned in the embodiments of the present application can also be called a device-level chip, a device chip, a chip device, or an on-chip device chip, etc.

[0152] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0153] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course, by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the twisted single yarn stretching modeling and simulation method of each embodiment of the present application.

[0154] In the description of this application, "first feature" and "second feature" may include one or more such features.

[0155] In the description of this application, “plurality” means two or more.

[0156] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

[0157] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0158] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A method for modeling and simulating the tensile strength of a twisted single yarn, characterized in that: The method comprises: Obtaining the diameter, length, twist, fiber diameter, density, fiber elastic modulus, and cross-sectional arrangement of the yarn to be tested, and constructing a geometric model of the yarn to be tested, wherein the yarn cross-section includes multiple concentric circles, and the cross-sectional arrangement is the fiber arrangement in the yarn cross-section; The geometric model is layered based on the fiber diameter and cross-sectional arrangement, each concentric circle is evenly divided into preset numerical portions, and the diameter of the concentric circles in each cross-sectional layer is calculated; The layered geometric model is constructed using ABAQUS software to obtain a layered yarn finite element model; Calculate the twist angle of each layer of the layered yarn finite element model based on the length, twist and diameter of the concentric circles in each layer cross section; Based on the twist angle of each layer, the elastic modulus of each layer of simulated yarn in the layered yarn finite element model is obtained. The diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement of the yarn to be tested and the elastic modulus of each layer of simulated yarn are input into the layered yarn finite element model to carry out a single yarn tensile simulation experiment to obtain single yarn tensile simulation data, which includes stress and strain.

2. The method for modeling and simulating the tensile strength of a twisted single yarn according to claim 1, wherein: The method of constructing a geometric model of the yarn to be tested comprises: Obtain the diameter, length, twist, fiber diameter and cross-sectional arrangement of the yarn to be tested; Taking the diameter of the yarn to be tested as the diameter and the length of the yarn to be tested as the height, a cylindrical model is constructed to obtain the geometric model of the yarn to be tested.

3. The method for modeling and simulating the tensile strength of a twisted single yarn according to claim 1, wherein: The geometric model is layered based on the fiber diameter and cross-sectional arrangement, and each concentric circle is evenly divided into preset numerical portions, including: Construct a yarn radius formula based on the number of fiber layers, fiber radius, and yarn radius; Obtaining the yarn radius of each layer based on the yarn radius formula; Layering the geometric model based on the yarn radius of each layer; Divide each concentric circle into a preset number of equal parts based on the angle.

4. The method for modeling and simulating the tensile strength of a twisted single yarn according to claim 1, wherein: The method of calculating the twist angle of each layer of the layered yarn finite element model based on the length, twist and diameter of the concentric circles in each layer cross section includes: Based on the length, twist and the diameter of the concentric circles in each layer cross section, the twist angle of each layer of the layered yarn finite element model is obtained by the twist angle calculation formula. The twist angle calculation formula is as follows: b i =tan -1 (2πR i ×T tex (h) Among them, β i is the twist angle of the i-th layer, R i is the radius of the concentric circle in the i-th layer section, T tex is the number of twist turns and h is the yarn length.

5. The method for modeling and simulating the tensile strength of a twisted single yarn according to claim 1, wherein: The method of obtaining the elastic modulus of each layer of simulated yarn in the layered yarn finite element model based on the twist angle of each layer includes: Based on the twist angle and fiber elastic modulus of each layer, the elastic modulus of each layer of the simulated yarn in the layered yarn finite element model is obtained by the elastic modulus calculation formula. The elastic modulus calculation formula is as follows: AND i =cosβ i 4 E0 Among them, E i is the elastic modulus of the simulated yarn in the i-th layer, β i is the twist angle of the i-th layer, and E0 is the fiber elastic modulus.

6. The method for modeling and simulating the tensile strength of a twisted single yarn according to claim 1, wherein: The method includes inputting the diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement of the yarn to be tested, and the elastic modulus of each layer of simulated yarn into a layered yarn finite element model to perform a single yarn tensile simulation experiment, including: Meshing the layered yarn finite element model, setting constraints and analysis steps, wherein the constraints are that one end is fixed and the other end is stretched; The diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement and elastic modulus of each layer of simulated yarn of the yarn to be tested are input into the layered yarn finite element model to carry out single yarn tensile simulation experiment.

7. The method for modeling and simulating the tensile strength of a twisted single yarn according to claim 1, wherein: The method further comprises: Draw stress-strain curve based on stress and strain; The total elastic modulus of the yarn to be tested was calculated based on the stress-strain curve.

8. A twisted single yarn stretching modeling and simulation device, implemented by the twisted single yarn stretching modeling and simulation method according to any one of claims 1 to 7, characterized in that: The device comprises: An acquisition module is used to acquire the diameter, length, twist, fiber diameter, density, fiber elastic modulus and cross-sectional arrangement of the yarn to be tested, and construct a geometric model of the yarn to be tested, wherein the yarn cross-section includes multiple concentric circles, and the cross-sectional arrangement is the fiber arrangement in the yarn cross-section; A first processing module is configured to divide the geometric model into layers based on the fiber diameter and cross-sectional arrangement, divide each concentric circle into a preset number of equal parts, and calculate the diameter of the concentric circles in each cross-sectional layer; The second processing module is used to construct a model of the layered geometric model using ABAQUS software to obtain a layered yarn finite element model; a third processing module for calculating the twist angle of each layer of the layered yarn finite element model based on the length, twist, and diameter of concentric circles in the cross section of each layer; The simulation module is used to obtain the elastic modulus of each layer of simulated yarn in the layered yarn finite element model based on the twist angle of each layer, and input the diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement and elastic modulus of each layer of simulated yarn of the yarn to be tested into the layered yarn finite element model to perform a single yarn tensile simulation experiment to obtain single yarn tensile simulation data, which includes stress and strain.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the twisted single yarn stretching modeling and simulation method as described in any one of claims 1 to 7 is implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the twisted single yarn tensile modeling and simulation method according to any one of claims 1 to 7 is implemented.

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