Twisted single yarn stretch modeling and simulation method and apparatus

Abstract

The application discloses a twisted single yarn tensile modeling and simulation method, and belongs to the technical field of finite element analysis. The method comprises the following steps: constructing a geometric model of a yarn to be measured, layering the geometric model based on fiber diameter and cross-section arrangement, constructing a model for the layered geometric model through ABAQUS software to obtain a layered yarn finite element model; calculating the twist angle of each layer of the layered yarn finite element model based on length, twist and the diameter of concentric circles in each layer of cross-section; obtaining the elastic modulus of the simulated yarn of each layer of the layered yarn finite element model based on the twist angle of each layer; inputting the diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-section arrangement and elastic modulus of the simulated yarn of each layer of the yarn to be measured into the layered yarn finite element model to perform a single yarn tensile simulation experiment, and obtaining single yarn tensile simulation data, so that the accuracy and simulation speed of the twisted single yarn modeling are improved.

Description

Technical Field

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

[0002] With the rapid development of computers, more and more industry professionals are focusing on the realistic simulation of textile properties. In the process of textile simulation, yarn, as the basic unit constituting the fabric, directly determines the final simulated fabric effect through its simulation performance. Therefore, yarn simulation has become particularly important in order to promote the application of yarn in fabrics.

[0003] Currently, there is a great deal of research on yarn simulation, such as constructing simplified geometric models of single yarns and ply yarns, conducting tensile fracture simulation studies on ring-spun yarns, performing tensile fracture experiments on cotton fibers to study the influence of yarn diameter and stretching speed on breaking strength, and studying the effects of different yarn stretching lengths and tensions. Existing simulation methods mainly fall into two categories: one is to directly model based on fiber morphology, but this modeling process is complex and simulation calculations are slow; the other is to construct simplified models for simulation experiments. This method is simpler to model and faster to simulate, but the resulting yarn mechanical property data has large errors. Different yarns have different fiber morphologies and rich twisting characteristics, and existing methods suffer from low accuracy and slow speed in yarn simulation, failing to quickly characterize the mechanical properties of yarns. Summary of the Invention

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

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

[0006] The diameter, length, twist, fiber diameter, density, fiber elastic modulus, and cross-sectional arrangement of the yarn to be tested are obtained, and a geometric model of the yarn to be tested is constructed. The cross-section of the yarn includes multiple concentric circles, and the cross-sectional arrangement is the fiber arrangement in the cross-section of the yarn.

[0007] Based on the fiber diameter and cross-sectional arrangement, the geometric model is divided into layers, and each concentric circle is divided into a preset number of equal parts. The diameter of the concentric circles in each layer is then calculated.

[0008] The layered geometric model was constructed using ABAQUS software to obtain the layered yarn finite element model.

[0009] Based on the length, twist, and the diameter of the concentric circles in each layer's cross-section, the twist angle of each layer in the finite element model of the layered yarn is calculated.

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

[0011] According to one embodiment of this application, constructing the 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] Using 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 this application, the step of layering the geometric model based on the fiber diameter and cross-sectional arrangement, dividing each concentric circle into a preset numerical number of equal parts, includes:

[0015] A formula for yarn radius is constructed based on the number of fiber layers, fiber radius, and yarn radius.

[0016] The yarn radius of each layer is obtained based on the yarn radius formula.

[0017] The geometric model is layered based on the yarn radius of each layer;

[0018] Each concentric circle is divided into a preset number of equal parts based on the angle.

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

[0020] Based on the length, twist, and the diameter of the concentric circles in each layer's cross-section, the twist angle of each layer in the finite element model of the layered yarn is obtained using the twist angle calculation formula, as shown below:

[0021] β i =tan -1 (2πR i ×T tex ÷h)

[0022] Where, β i R is the twist angle of the i-th layer. i Let T be the radius of the concentric circles in the i-th layer section. tex is the number of twists, and h is the yarn length.

[0023] According to one embodiment of this application, obtaining the elastic modulus of each simulated yarn layer in the finite element model of the layered yarn 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 simulated yarn layer in the finite element model of the layered yarn is obtained through the elastic modulus calculation formula, which is shown below:

[0025] E i =cosβ i 4 E0

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

[0027] According to one embodiment of this application, 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 into the layered yarn finite element model for single yarn tensile simulation experiments includes:

[0028] The layered yarn finite element model is meshed, and constraints and analysis steps are set. The constraint is 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 are input into the layered yarn finite element model to conduct single yarn tensile simulation experiments.

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

[0031] Plotting stress-strain curves based on stress and strain;

[0032] The total elastic modulus of the yarn under test is calculated based on the stress-strain curve.

[0033] Secondly, this application provides a device for modeling and simulating the stretching of twisted single yarn, the device comprising:

[0034] The 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 to construct a geometric model of the yarn to be tested. The cross-section of the yarn includes multiple concentric circles, and the cross-sectional arrangement is the fiber arrangement in the cross-section of the yarn.

[0035] The first processing module is used 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 layer of cross-section.

[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] The third processing module is used to calculate the twist angle of each layer of the layered yarn finite element model based on the length, twist, and the diameter of the concentric circles in the cross-section of each layer.

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

[0039] Thirdly, this application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the twisted single yarn stretching modeling and simulation method as described in the first aspect above.

[0040] Fourthly, this 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] Fifthly, this application provides a chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being 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, this application provides a computer program product, including a computer program that, 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 this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application.

[0044] The present invention provides a method for modeling and simulating the stretching of twisted single yarn, which has the following advantages over the prior art:

[0045] (1) This invention constructs a geometric model of the yarn by acquiring the diameter, length, twist, fiber diameter, density, fiber elastic modulus, and cross-sectional arrangement of the yarn to be tested. The geometric model is then analyzed and simulated using ABAQUS software, which effectively improves the accuracy of 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, which improves the convergence of the layered yarn finite element model, reduces the simulation error rate, and can quickly characterize the influence of yarn twisting characteristics on yarn mechanical properties. It can also quickly simulate yarn properties and reflect the internal properties of the yarn, laying the foundation for studying the influence of twisting characteristics on yarn properties.

[0046] (2) This 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 represent the stress gradient of the yarn and make the influence of material properties on yarn performance more obvious, thus realizing rapid simulation of the tensile properties of twisted single yarn.

[0047] (3) The present invention calculates the elastic modulus of each layer of simulated yarn by using the elastic modulus calculation formula based on the twist angle and fiber elastic modulus of each layer, which effectively improves the simulation accuracy of single yarn tensile properties. 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, thus improving the calculation accuracy of yarn simulation. Attached Figure Description

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

[0049] Figure 1 This is a flowchart illustrating the twisted single yarn stretching modeling and simulation method provided in the embodiments of this application;

[0050] Figure 2 This is a schematic diagram of the yarn cross-section provided in an embodiment of this application;

[0051] Figure 3 This is a schematic diagram of the structure of the layered yarn finite element model provided in the embodiments of this application;

[0052] Figure 4 This is a structural schematic diagram of the material orientation provided in the embodiments of this application;

[0053] Figure 5 This is a schematic diagram of the geometric model of the yarn to be tested provided in the embodiments of this application;

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

[0055] Figure 7 This is a stress cloud diagram of yarn simulation provided in the embodiments of this application;

[0056] Figure 8 This is an experimental schematic diagram of yarn tensile fracture provided in the embodiments of this application;

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

[0058] Figure 10 This is a schematic diagram of the structure of the twisted single yarn stretching modeling and simulation device provided in the embodiments of this application;

[0059] Figure 11 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0060] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0061] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0062] The following description, in conjunction with the accompanying drawings, details the method, apparatus, electronic device, and readable storage medium for modeling and simulating twisted single yarn stretching provided in this application, through specific embodiments and application scenarios.

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

[0064] The terminal includes, but is not limited to, portable communication devices such as mobile phones or tablets with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads). It should also be understood that, in some embodiments, the terminal may not be a portable communication device, but rather a desktop computer with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads).

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

[0066] The twisted single yarn stretching modeling and simulation method provided in this application embodiment can be executed by an electronic device or a functional module or entity in an electronic device that can realize the twisted single yarn stretching modeling and simulation method. The electronic devices mentioned in this application embodiment include, but are not limited to, mobile phones, tablets, computers, cameras and wearable devices. The twisted single yarn stretching modeling and simulation method provided in this application embodiment will be described below using an electronic device as the execution subject.

[0067] Figure 1 This is a flowchart illustrating the twisted single yarn stretching modeling and simulation method provided in this application embodiment, as shown below. Figure 1 As shown, the twisted single yarn stretching modeling and simulation method includes steps 110, 120, 130, 140 and 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 the geometric model of the yarn to be tested. The cross-section of the yarn includes multiple concentric circles, and the cross-sectional arrangement is the fiber arrangement in the cross-section of the yarn.

[0069] The process is easy to understand: obtain the yarn to be tested, and use measuring tools to measure the yarn's diameter, length, twist, fiber diameter, and cross-sectional arrangement. Construct a geometric model of the yarn to be tested using the yarn diameter as the diameter and the yarn length as the height.

[0070] Step 120: Based on the fiber diameter and cross-sectional arrangement, the geometric model is divided into layers, each concentric circle is divided into a preset number of equal parts, and the diameter of the concentric circles in each layer is calculated.

[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 This is a schematic diagram of the yarn cross-section provided in the embodiments of this application, as shown below. 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 equal parts, each part being 18 degrees.

[0072] Step 130: Use ABAQUS software to construct the layered geometric model to obtain the layered yarn finite element model;

[0073] Furthermore, Figure 3 This is a schematic diagram of the structure of the layered yarn finite element model provided in the embodiments of this application, as shown below. Figure 3 As shown, based on the diameter of the concentric circles in each layer of the yarn geometry model, the radius of each layer is input into the numerical simulation software ABAQUS to construct the model and divide it into layers, thus obtaining a layered yarn finite element model.

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

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

[0076] Based on the length, twist, and the diameter of the concentric circles in each layer's cross-section, the twist angle of each layer in the finite element model of the layered yarn is obtained using the twist angle calculation formula, as shown below:

[0077] β i =tan -1 (2πR i ×T tex ÷h)

[0078] Where, β i R is the twist angle of the i-th layer. i Let T be the radius of the concentric circles in the i-th layer section. tex is the number of twists, and h is the yarn length.

[0079] The formula for calculating the number of twists 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 using the twist angle calculation formula based on the yarn length, twist, and the diameter of the concentric circles in the cross-section of each layer. This effectively improves the simulation accuracy of yarn tensile properties, enabling more accurate simulation of the yarn's mechanical properties and making the yarn tensile simulation process more accurate, thus enhancing the simulation precision.

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

[0084] In some embodiments, obtaining the elastic modulus of each simulated yarn layer in the finite element model of the layered yarn 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 simulated yarn layer in the finite element model of the layered yarn is obtained through the elastic modulus calculation formula, which is shown below:

[0086] E i =cosβ i 4 E0

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

[0088] In this embodiment, the elastic modulus of each simulated yarn layer is calculated using the elastic modulus calculation formula based on the twist angle and fiber elastic modulus of each layer, which effectively improves the simulation accuracy of the tensile properties of single yarn. By calculating the elastic modulus of each yarn layer 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, thus improving the calculation accuracy of the yarn simulation.

[0089] Finally, the diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement, and elastic modulus of each layer of simulated yarn are input into the layered yarn finite element model. The layered yarn finite element model is then meshed, and constraints are set. Figure 4 This is a structural schematic diagram of the material orientation provided in the embodiments of this application, such as... Figure 4 As shown, parameters such as material orientation for each model are set according to the anisotropy of the mechanical properties of fiber materials, and a single yarn stretching simulation experiment is carried out.

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

[0091] In some embodiments, constructing the 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] Using 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] The easy-to-understand approach is to construct a cylindrical model using the diameter of the yarn to be tested as its diameter and its length as its height, thus obtaining the geometric model of the yarn. Figure 5 This is a schematic diagram of the geometric model of the yarn to be tested provided in the embodiments of this 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 using the yarn diameter and length as parameters, the geometric characteristics of the yarn to be tested can be characterized more accurately. This facilitates the subsequent prediction of the correlation between the twisted structure characteristics and the tensile modulus of the single yarn, making the subsequent simulation calculations more accurate.

[0096] In some embodiments, the step of layering the geometric model based on the fiber diameter and cross-sectional arrangement, dividing each concentric circle into a preset number of equal parts, includes:

[0097] A formula for yarn radius is constructed based on the number of fiber layers, fiber radius, and yarn radius.

[0098] The yarn radius of each layer is obtained based on the yarn radius formula.

[0099] The geometric model is layered based on the yarn radius of each layer;

[0100] Each concentric circle is divided 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 based on fiber diameter and fiber arrangement, and 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 formula for calculating the yarn radius is constructed based on the number of fiber layers, fiber radius, and yarn radius, as shown below:

[0105] R i = (2i-1)×r

[0106] Where i is the number of fiber layers, r is the fiber radius, and R i Let be the radius of the i-th layer of yarn.

[0107] In this embodiment, the yarn radius of each layer is calculated by constructing a yarn radius formula, and the geometric model is processed in layers, which makes it easier to represent the stress gradient of the yarn, and makes the influence of material properties on yarn performance more obvious, thus realizing rapid simulation of the tensile properties of twisted single yarn.

[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 into the layered yarn finite element model for single-yarn tensile simulation experiments includes:

[0109] The layered yarn finite element model is meshed, and constraints and analysis steps are set. The constraint is 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 are input into the layered yarn finite element model to conduct single yarn tensile simulation experiments.

[0111] For example, in ABAQUS, the layered yarn finite element model is meshed into 78,000 meshes of type C3D8R. The model is divided into 20 parts, and the material direction is marked according to the anisotropy of the yarn material. The constraints of the model are set, with one end fixed and the other end stretched. The overall strain is 20%. An appropriate analysis step is set to conduct a single yarn stretching simulation experiment.

[0112] In this embodiment, by inputting various data of the yarn under test into the layered yarn finite element model for single yarn stretching simulation experiments, and combining mesh generation, constraint 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 single yarn mechanical properties by yarn twisting characteristics and fiber material properties is realized.

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

[0114] Plotting stress-strain curves based on stress and strain;

[0115] The total elastic modulus of the yarn under test is calculated based on the stress-strain curve.

[0116] For example, record the simulation data of single yarn tension, and plot the stress-strain curve based on the stress gradient in the model. Figure 6 This is a schematic diagram of the stress-strain curve provided in the embodiments of this application, such as... Figure 6 As shown, the stress during the yarn stretching simulation is calculated using the stress formula based on the stress-strain curve:

[0117]

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

[0119] The strain during the yarn stretching simulation is calculated using the strain formula, as shown below:

[0120]

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

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

[0123]

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

[0125] Figure 8 This is an experimental schematic diagram of yarn tensile fracture provided in the embodiments of this application, as shown below. Figure 8 As shown, tensile fracture tests were conducted on yarns with various twists, and the breaking strength of the yarns with different twists was recorded. Figure 9This is a comparison chart of tensile breaking strength-time of yarns with different twists provided in the embodiments of this application, such as... Figure 9 As shown, the maximum fracture strength is obtained from the fracture strength-time comparison diagram, and the actual stress is obtained based on the maximum fracture strength. The calculation formula is as follows:

[0126]

[0127] Where σ0 is the actual stress, F0 is the maximum fracture strength, and S0 is the actual cross-sectional area.

[0128] The formula for calculating actual strain is shown below:

[0129]

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

[0131] The actual elastic modulus is obtained from the actual strain and actual stress, and the calculation formula is as follows:

[0132]

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

[0134] In this embodiment, by plotting stress-strain curves and calculating the total elastic modulus of the yarn under test, the mechanical properties of the yarn during the stretching process can be evaluated more accurately, effectively improving the calculation accuracy of the yarn's elastic modulus.

[0135] The twisted single yarn stretching modeling and simulation method provided in this application can be executed by a twisted single yarn stretching modeling and simulation device. This application uses the twisted single yarn stretching modeling and simulation device executing the twisted single yarn stretching modeling and simulation method as an example to illustrate the twisted single yarn stretching modeling and simulation device provided in this application.

[0136] This application also provides a device for modeling and simulating the stretching of twisted single yarn, such as... Figure 10 As shown, the twisted single yarn stretching 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] The acquisition module 1010 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 to construct a geometric model of the yarn to be tested. The cross-section of the yarn includes multiple concentric circles, and the cross-sectional arrangement is the fiber arrangement in the cross-section of the yarn.

[0138] The first processing module 1020 is used 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 layer of cross-section.

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

[0141] The simulation module 1050 is used to obtain the elastic modulus of each simulated yarn layer in the layered yarn finite element model based on the twist angle of each layer. The diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement, and elastic modulus of each simulated yarn layer of the yarn to be tested are input into the layered yarn finite element model to conduct single yarn tensile simulation experiments and 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 this application, a geometric model of the yarn is constructed by acquiring the diameter, length, twist, fiber diameter, density, fiber elastic modulus, and cross-sectional arrangement of the yarn to be tested. Finite element analysis and simulation experiments are performed on the geometric model using ABAQUS software, which effectively improves the accuracy of 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, reduces the simulation error rate, and can quickly characterize the influence of yarn twisting characteristics on yarn mechanical properties. It can quickly simulate yarn properties and reflect the internal properties of the yarn, laying the foundation for studying the influence of twisting characteristics on yarn properties.

[0143] The twisted single yarn stretching modeling and simulation device provided in this application embodiment can achieve... Figures 1 to 9 The various processes implemented in the example of the twisted single yarn stretching modeling and simulation method will not be repeated here to avoid repetition.

[0144] In some embodiments, such as Figure 11 As shown, this application embodiment 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, it implements the various processes of the above-described twisted single yarn stretching modeling and simulation method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

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

[0146] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described embodiments of the twisted single yarn stretching modeling and simulation method, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

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

[0148] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method for modeling and simulating the stretching of twisted single yarn.

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

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

[0151] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a device-level chip, device chip, chip device, or on-chip device chip, etc.

[0152] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

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

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

[0155] In the description of this application, "multiple" means two or more.

[0156] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0157] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0158] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for modeling and simulating the stretching of twisted single yarn, characterized in that, The method includes: The diameter, length, twist, fiber diameter, density, fiber elastic modulus, and cross-sectional arrangement of the yarn to be tested are obtained, and a geometric model of the yarn to be tested is constructed. The cross-section of the yarn includes multiple concentric circles, and the cross-sectional arrangement is the fiber arrangement in the cross-section of the yarn. Based on the fiber diameter and cross-sectional arrangement, the geometric model is divided into layers, and each concentric circle is divided into a preset number of equal parts. The diameter of the concentric circles in each layer is then calculated. The layered geometric model was constructed using ABAQUS software to obtain the layered yarn finite element model. Based on the length, twist, and the diameter of the concentric circles in each layer's cross-section, the twist angle of each layer in the finite element model of the layered yarn is calculated. Based on the twist angle of each layer, the elastic modulus of each simulated yarn in the layered yarn finite element model is obtained. The diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement, and elastic modulus of each simulated yarn are input into the layered yarn finite element model to conduct single yarn tensile simulation experiments, and single yarn tensile simulation data are obtained. The single yarn tensile simulation data includes stress and strain.

2. The method for modeling and simulating the stretching of twisted single yarn according to claim 1, characterized in that, The construction of the geometric model of the yarn to be tested includes: Obtain the diameter, length, twist, fiber diameter, and cross-sectional arrangement of the yarn to be tested; Using 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 stretching of twisted single yarn according to claim 1, characterized in that, The geometric model is layered based on the fiber diameter and cross-sectional arrangement, and each concentric circle is divided into a preset number of equal parts, including: A formula for yarn radius is constructed based on the number of fiber layers, fiber radius, and yarn radius. The yarn radius of each layer is obtained based on the yarn radius formula. The geometric model is layered based on the yarn radius of each layer; Each concentric circle is divided into a preset number of equal parts based on the angle.

4. The method for modeling and simulating the stretching of twisted single yarn according to claim 1, characterized in that, The calculation of the twist angle of each layer in the finite element model of the layered yarn, based on length, twist, and the diameter of the concentric circles in the cross-section of each layer, includes: Based on the length, twist, and the diameter of the concentric circles in each layer's cross-section, the twist angle of each layer in the finite element model of the layered yarn is obtained using the twist angle calculation formula, as shown below: b i =tan -1 (2πR i ×T tex (h) Where, β i R is the twist angle of the i-th layer. i Let T be the radius of the concentric circles in the i-th layer section. tex is the number of twists, and h is the yarn length.

5. The method for modeling and simulating the stretching of twisted single yarn according to claim 1, characterized in that, The elastic modulus of each simulated yarn layer in the finite element model of the layered yarn, obtained 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 simulated yarn layer in the finite element model of the layered yarn is obtained through the elastic modulus calculation formula, which is shown below: AND i =cosβ i 4 E0 Among them, E i Let β be the elastic modulus of the i-th simulated yarn. i Let E0 be the twist angle of the i-th layer and E0 be the fiber elastic modulus.

6. The method for modeling and simulating the stretching of twisted single yarn according to claim 1, characterized in that, The process involves inputting the diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement, and elastic modulus of each layer of simulated yarn into a layered yarn finite element model for single-yarn tensile simulation experiments, including: The layered yarn finite element model is meshed, and constraints and analysis steps are set. The constraint is 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 are input into the layered yarn finite element model to conduct single yarn tensile simulation experiments.

7. The method for modeling and simulating the stretching of twisted single yarn according to claim 1, characterized in that, The method further includes: Plotting stress-strain curves based on stress and strain; The total elastic modulus of the yarn under test is calculated based on the stress-strain curve.

8. A device for modeling and simulating the stretching of twisted single yarn, implemented using the method for modeling and simulating the stretching of twisted single yarn as described in any one of claims 1 to 7, characterized in that, The device includes: The 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 to construct a geometric model of the yarn to be tested. The cross-section of the yarn includes multiple concentric circles, and the cross-sectional arrangement is the fiber arrangement in the cross-section of the yarn. The first processing module is used 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 layer of cross-section. 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. The third processing module is used to calculate the twist angle of each layer of the layered yarn finite element model based on the length, twist, and the diameter of the concentric circles in the cross-section of each layer. The simulation module is used to obtain the elastic modulus of each simulated yarn layer in the layered yarn finite element model based on the twist angle of each layer. The diameter, length, twist, fiber diameter, density, fiber elastic modulus, cross-sectional arrangement, and elastic modulus of each simulated yarn layer of the yarn to be tested are input into the layered yarn finite element model to conduct single yarn tensile simulation experiments and 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, characterized in that, When the processor executes the program, it implements the twisted single yarn stretching modeling and simulation method as described in any one of claims 1 to 7.

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

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