Crack representation method, device, equipment, storage medium and product

Abstract

The invention discloses a crack representation method, device and equipment, a storage medium and a product, and relates to the technical field of crack propagation, the crack representation method comprises the following steps: establishing a finite element grid based on cracks; determining a spatial position description point in the crack according to each finite element in the finite element grid; constructing a crack point vector based on the spatial position description points in the finite element; selecting a reference point in the finite element, and constructing a reference vector based on the reference point and the spatial position description point; and representing the crack based on the crack point vector and the reference vector. According to the method, the crack point vector and the reference vector are determined, and the crack is represented based on the crack point vector and the reference vector, so that a level set method does not need to be adopted, and simpler and more convenient description of the crack is realized.

Description

Technical Field

[0001] The present application relates to the field of crack propagation technology, and in particular to a crack representation method, device, equipment, storage medium and product. Background Art

[0002] In the field of crack propagation, the Extended Finite Element Method (XFEM) is a commonly used fatigue crack propagation simulation method. It is based on the unit decomposition method and strengthens the conventional finite element unit displacement function so that the unit displacement function can reflect the discontinuity and singularity of the displacement field and strain field. The XFEM network division is independent of the crack, and there is no need to re-divide the grid when performing crack propagation analysis. Since XFEM was proposed, this method has received widespread attention, especially in the simulation technology of crack propagation. BLKarihaloo proved that by introducing appropriate strengthening functions into the conventional finite element unit displacement function, XFEM can be used to simulate various discontinuous fields, such as steps, intersections, singularities, etc. Amir R. Khoei and Yu Tiantang comprehensively summarized the research results, basic theories, and application methods of XFEM in recent years, and elaborated in detail how to use XFME to calculate fracture mechanics problems. Since the XFEM unit mesh is independent of the crack, more and more fatigue crack propagation studies have adopted this method. Many commercial software, such as Abaqus6.14, Ansys18.0, HyperWorks14.0, Alof3.0.1, etc.

[0003] In these studies or commercial software, the level set method is used to describe cracks. The level set method is a numerical technique used for interface tracking and shape modeling. It embeds the evolving curve or surface as a zero level set into a higher-dimensional level set function, and achieves the purpose of evolving the zero level set by evolving the function in the higher dimension. This method can perform numerical calculations on a Cartesian grid without parameterizing the curve or surface, thereby conveniently tracking the topological changes of the object, such as splitting and merging. Therefore, it is widely used in XFEM to describe the evolution of cracks. However, the processing of high-dimensional level set functions is usually not simple, especially whether the implementation in program design is complex. Summary of the invention

[0004] The main purpose of this application is to provide a crack representation method, device, equipment, storage medium and product, aiming to solve the problem that the existing crack description method requires high-dimensional level set function processing to achieve complex technical problems.

[0005] To achieve the above objectives, the present application proposes a crack representation method, which includes:

[0006] Establish finite element mesh based on cracks;

[0007] Determining a spatial position description point in the crack according to each finite element in the finite element grid;

[0008] Constructing a crack point vector based on the spatial position description point within the finite element;

[0009] Selecting a reference point in the finite element, and constructing a reference vector based on the reference point and the spatial position description point;

[0010] The crack is represented based on the crack point vector and the reference vector.

[0011] In one embodiment, the step of constructing a crack point vector based on the spatial position description point in the finite element comprises:

[0012] determining a growth direction of the crack;

[0013] Based on the growth direction, vectors are constructed for the spatial position description points within each of the finite elements to obtain crack point vectors.

[0014] In one embodiment, the step of selecting a reference point in the finite element and constructing a reference vector based on the reference point and the spatial position description point includes:

[0015] Determining a first crack point and a second crack point of the crack point vector based on the growth direction; the second crack point is an end point of the crack point vector, and the first crack point is a starting point of the crack point vector;

[0016] A reference point is selected in the finite element, and a reference vector is constructed based on the reference point and the first crack point.

[0017] In one embodiment, the step of representing the crack based on the crack point vector and the reference vector comprises:

[0018] Determine the coordinate system vector of the reference point;

[0019] Determining components and unit step function values ​​based on the coordinate system vector, the crack point vector and the reference vector;

[0020] The crack is represented by the components and the unit step function value.

[0021] In one embodiment, the step of determining a spatial position description point in the crack according to each finite element in the finite element grid comprises:

[0022] Determining the inflection point of the crack and the intersection point between the crack and the boundary of each finite element;

[0023] The inflection point and the boundary intersection point are used as the spatial position description point of the crack.

[0024] In one embodiment, the step of selecting a reference point in the finite element and constructing a reference vector based on the reference point and the spatial position description point includes:

[0025] Selecting a reference point within the finite element;

[0026] Determining an integration point based on the spatial position description point;

[0027] A reference vector is constructed based on the reference point and the integration point.

[0028] In addition, to achieve the above-mentioned purpose, the present application also proposes a crack indication device, the crack indication device comprising:

[0029] A mesh building module for building finite element meshes based on cracks;

[0030] A description point determination module, used to determine a spatial position description point in the crack according to each finite element in the finite element grid;

[0031] A vector construction module, used to construct a crack point vector based on the spatial position description point in the finite element;

[0032] The vector construction module is further used to select a reference point in the finite element and construct a reference vector based on the reference point and the spatial position description point;

[0033] A crack representation module is used to represent the crack based on the crack point vector and the reference vector.

[0034] In addition, to achieve the above objectives, the present application also proposes a crack representation device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the crack representation method described above.

[0035] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the crack representation method described above are implemented.

[0036] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, wherein the computer program product includes a computer program, and when the computer program is executed by a processor, the steps of the crack representation method described above are implemented.

[0037] One or more technical solutions proposed in this application have at least the following technical effects:

[0038] The present application establishes a finite element grid based on the crack; determines the spatial position description points in the crack according to each finite element in the finite element grid; constructs a crack point vector based on the spatial position description points in the finite element; selects a reference point in the finite element, and constructs a reference vector based on the reference point and the spatial position description point; and represents the crack based on the crack point vector and the reference vector. Since the crack point vector and the reference vector are determined, and then the crack is represented based on the crack point vector and the reference vector, there is no need to use the level set method, and a simpler description of the crack is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0041] Figure 1 A schematic diagram of a process flow provided for the first embodiment of the crack representation method of the present application;

[0042] Figure 2 A schematic diagram of a spatial position description point in one implementation of the crack representation method of the present application;

[0043] Figure 3 A schematic diagram of a process flow provided for the second embodiment of the crack representation method of the present application;

[0044] Figure 4 This is a schematic diagram of the module structure of the crack representation device according to an embodiment of the present application;

[0045] Figure 5 Schematic diagram of the device structure of the hardware operating environment involved in the crack representation method in the embodiment of the present application.

[0046] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0048] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0049] The main solution of the embodiment of the present application is: establish a finite element grid based on the crack; determine the spatial position description point in the crack according to each finite element in the finite element grid; construct a crack point vector based on the spatial position description point in the finite element; select a reference point in the finite element, and construct a reference vector based on the reference point and the spatial position description point; represent the crack based on the crack point vector and the reference vector.

[0050] At present, the existing technology uses the level set method to describe cracks. When describing three-dimensional cracks, the level set method needs to calculate the signed distance function from the unit node and the integration point to the crack surface, and the implementation process is relatively complicated.

[0051] Based on the characteristics of shell elements, this application proposes a shell element crack representation method suitable for extended finite element elements. The method is to determine the spatial position description points of the cracks in each finite element, and to construct crack point vectors and reference vectors based on the spatial description points and the selected reference points, respectively, so as to perform calculations based on the crack point vectors and the reference vectors to achieve the representation of the cracks. Compared with the existing crack description methods, the embodiments of this application use a relatively simple vector product method to describe the cracks, which greatly simplifies the program design work of crack tracking.

[0052] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a virtual device, etc. The following takes a crack representation device as an example to illustrate this embodiment and the following embodiments.

[0053] Based on this, the present application embodiment provides a crack representation method, referring to Figure 1 , Figure 1 This is a schematic flow chart of the first embodiment of the crack representation method of the present application.

[0054] In this embodiment, the crack representation method includes steps S10 to S50:

[0055] Step S10, establishing a finite element mesh based on the crack;

[0056] Step S20, determining a spatial position description point in the crack according to each finite element in the finite element grid.

[0057] It is understood that finite element mesh is a fundamental component in finite element analysis. It refers to the division of a complex set model into multiple smaller, simpler regions or units, which are called finite elements in finite element analysis. Each finite element can be connected to each other through nodes to form a complete mesh structure.

[0058] It should be noted that, for each finite element in the finite element grid, it may correspond to four boundaries, and for two adjacent finite elements, their boundaries may overlap each other. For each finite element in the finite element network, its boundary may intersect with the crack, and the intersection point may be used as a spatial position description point.

[0059] In addition, it should be noted that a crack may usually have an inflection point, and the inflection point of the crack may also be used as a point describing the spatial position.

[0060] Step S30, constructing a crack point vector based on the spatial position description point in the finite element.

[0061] It should be noted that for a finite element, it may include several spatial position description points, and for each spatial position description point, a corresponding crack point vector can be constructed. Figure 2 As shown, Figure 4 This is a schematic diagram of a spatial position description point in an implementation method of the present application. Figure 2 In the figure, there are five spatial position description points on the crack. For these spatial position description points, the right-hand rule can be used to sort the node numbers, which are numbered a, b, c, d, and e (according to the growth direction of the crack). In each finite element, the crack point vector can be constructed. The crack growth direction can be described by the crack point vector.

[0062] It should be explained that in the embodiment of the present application and the following embodiments, the description of "inside a finite element" may include points on the boundary of the finite element.

[0063] It can be understood that the growth direction of the crack is also the direction in which the crack expands in the material. By understanding the growth direction of the crack, material damage or failure can be predicted, thereby improving the safety and reliability of the material. That is, the step of constructing a crack point vector based on the spatial position description point in the finite element includes: determining the growth direction of the crack; constructing a vector for the spatial position description point in each of the finite elements based on the growth direction to obtain a crack point vector.

[0064] Step S40, selecting a reference point in the finite element, and constructing a reference vector based on the reference point and the spatial position description point;

[0065] Step S50, representing the crack based on the crack point vector and the reference vector.

[0066] It should be noted that the above-mentioned reference point can be any point in the finite element. Based on the spatial position of the reference point and the spatial position of the spatial description point, a reference vector can be constructed. Based on the reference vector and the above-mentioned crack point vector, calculation can be performed to represent the crack without the need for complex high-dimensional level set function processing, thereby reducing the difficulty of crack growth simulation.

[0067] The embodiment of the present application establishes a finite element grid based on the crack; determines the spatial position description point in the crack according to each finite element in the finite element grid; constructs a crack point vector based on the spatial position description point in the finite element; selects a reference point in the finite element, and constructs a reference vector based on the reference point and the spatial position description point; and represents the crack based on the crack point vector and the reference vector. Since the crack point vector and the reference vector are determined, and then the crack is represented based on the crack point vector and the reference vector, there is no need to use the level set method, and a simpler description of the crack is achieved.

[0068] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 3 , the step of constructing a crack point vector based on the spatial position description point in the finite element comprises:

[0069] The step of selecting a reference point in the finite element and constructing a reference vector based on the reference point and the spatial position description point comprises:

[0070] Step S321, determining a first crack point and a second crack point of the crack point vector based on the growth direction; the second crack point is an end point of the crack point vector, and the first crack point is a starting point of the crack point vector;

[0071] Step S322, selecting a reference point in the finite element, and constructing a reference vector based on the reference point and the first crack point.

[0072] It should be noted that along the growth direction of the crack, the upstream and downstream points of each spatial position description point can be determined in sequence. Figure 2 The spatial positions shown in the figure describe points a, b, c, d, and e. Among them, a, b, c, and e are the intersection points of the crack and the boundary of the finite element, and d is the inflection point of the crack. For point a, its corresponding downstream points are b, c, d, and e; for point b, its corresponding upstream point is a, and its downstream points are c, d, and e; for the upstream and downstream points of other points, you can refer to the above, and the embodiments of this application will not be repeated.

[0073] It can be understood that based on the spatial position description points on the crack in each finite element, the crack can be divided into several crack units, such as crack segment ab, crack segment bc, and crack segment cde.

[0074] It should be noted that within the finite element containing the crack segment ab, the crack point vector can be constructed And it can be specifically expressed as:

[0075]

[0076] Among them, X b and X a They respectively represent the coordinate positions of spatial position description point b and spatial position description point a.

[0077] It should be noted that, within the finite element, any point i can be selected as the reference point. And construct the vector from point i to point a (i.e., the first crack point) Among them, X i Indicates the coordinate position of reference point i.

[0078] Further, the step of representing the crack based on the crack point vector and the reference vector comprises:

[0079] Determine the coordinate system vector of the reference point;

[0080] Determining components and unit step function values ​​based on the coordinate system vector, the crack point vector and the reference vector;

[0081] The crack is represented by the components and the unit step function value.

[0082] It should be noted that when the crack point vector and the reference vector are determined, the components and the unit step function value can be calculated based on the crack point vector and the reference vector. Specifically, the calculation method of the components can be as follows:

[0083]

[0084] Among them, V i3 is the node coordinate system vector V3 at the reference point i.

[0085] The value of the unit step function can be calculated as follows:

[0086]

[0087] It can be understood that when the component is less than 0, the value of the unit step function is -1; when the component is greater than 0, the value of the unit step function can be +1.

[0088] In one implementation of the present application, for a finite element including multiple spatial position description points, such as for a finite element including a crack segment cde, a crack point vector can be constructed. and Specifically:

[0089]

[0090] Among them, X c , X d , X e They respectively represent the coordinate positions of the spatial position description points c, d, and e.

[0091] In one implementation of the embodiment of the present application, an integral point in the spatial position description point can be determined in a finite element, and a reference vector can be constructed based on the reference point and the integral point. Specifically, the step of selecting a reference point in the finite element and constructing a reference vector based on the reference point and the spatial position description point includes:

[0092] Selecting a reference point within the finite element;

[0093] Determining an integration point based on the spatial position description point;

[0094] A reference vector is constructed based on the reference point and the integration point.

[0095] It should be noted that the embodiment of the present application does not impose any specific restrictions on the selection method of the integral points.

[0096] In one implementation of the embodiment of the present application, the selection of the integral point can be determined based on the reference point. Specifically, the positional relationship between the reference point and each spatial position description point can be determined. If a spatial position description point is in the upstream direction of the reference point, the spatial position description point can be used as an integral point. The above upstream direction is also the opposite direction of the crack growth direction. For example, when the crack growth direction is to grow to the right, the upstream direction of the reference point can include the upper left, the left, and the lower left.

[0097] For the reference point i in the finite element, the vectors to the integration points c and d are:

[0098]

[0099] Furthermore, the corresponding components can be calculated:

[0100]

[0101] Furthermore, its unit step function value can be shown as follows:

[0102]

[0103] In this embodiment, when the first condition is satisfied (the first condition is: the first component Less than zero, second component Less than zero) or the second condition (the second condition is: the first component Second Component With the third component The unit step function value can be -1 when the third condition is met (the third condition is: the first component Greater than zero, second component greater than zero) or the fourth condition (the fourth condition is: the first component Second Component With the third component When the product of is less than zero), the unit step function value can be +1.

[0104] Furthermore, the step of determining the spatial position description point in the crack according to each finite element in the finite element grid comprises:

[0105] Step S21, determining the inflection point of the crack and the intersection point between the crack and the boundary of each finite element;

[0106] Step S22: taking the inflection point and the boundary intersection as a spatial position description point of the crack.

[0107] It should be noted that the above boundary intersection point is also the intersection point between the crack and the boundary of the finite element. The boundary intersection point can also be regarded as a point within the finite element.

[0108] It is understandable that during the crack growth process, the direction may change due to various factors such as the internal microstructure of the material, stress distribution, loading conditions, etc. This sudden change or turning in direction is the inflection point of the crack.

[0109] The embodiment of the present application determines the first crack point and the second crack point of the crack point vector based on the growth direction; selects a reference point in the finite element, and constructs a reference vector based on the reference point and the first crack point. The present application constructs a crack point vector and a reference vector, and calculates the component and unit step function values. The above calculation process needs to be calculated when performing the unit stiffness matrix integration, and there is no need to add additional calculation processes, thereby simplifying the crack representation.

[0110] This application also provides a crack indication device, please refer to Figure 4 , the crack indicating device comprises:

[0111] A mesh building module 10, used for building a finite element mesh based on cracks;

[0112] A description point determination module 20, for determining a spatial position description point in the crack according to each finite element in the finite element grid;

[0113] A vector construction module 30, for constructing a crack point vector based on the spatial position description point within the finite element;

[0114] The vector construction module 30 is further used to select a reference point in the finite element and construct a reference vector based on the reference point and the spatial position description point;

[0115] The crack representation module 40 is used to represent the crack based on the crack point vector and the reference vector.

[0116] The crack representation device provided by the present application adopts the crack representation method in the above embodiment, which can solve the problem that the existing crack description method needs to perform high-dimensional level set function processing to achieve complex technical problems. Compared with the prior art, the beneficial effects of the crack representation device provided by the present application are the same as the beneficial effects of the crack representation method provided by the above embodiment, and other technical features in the crack representation device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0117] The present application provides a crack representation device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the crack representation method in the above-mentioned embodiment 1.

[0118] Reference below Figure 5 , which shows a schematic diagram of a crack indication device suitable for implementing the embodiments of the present application. The crack indication device in the embodiments of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The crack representation device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0119] like Figure 5As shown, the crack representation device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the crack representation device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 may allow the crack representation device to communicate with other devices wirelessly or by wire to exchange data. Although the crack representation device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have alternatively.

[0120] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0121] The crack representation device provided by the present application adopts the crack representation method in the above embodiment, which can solve the problem that the existing crack description method needs to perform high-dimensional level set function processing to achieve complex technical problems. Compared with the prior art, the beneficial effects of the crack representation device provided by the present application are the same as the beneficial effects of the crack representation method provided by the above embodiment, and the other technical features in the crack representation device are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0122] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0123] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0124] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer program) stored thereon, and the computer-readable program instructions are used to execute the crack representation method in the above-mentioned embodiment.

[0125] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0126] The computer-readable storage medium may be included in the crack representation device; or may exist independently without being assembled into the crack representation device.

[0127] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the crack representation device, the crack representation device:

[0128] Establish finite element mesh based on cracks;

[0129] Determining a spatial position description point in the crack according to each finite element in the finite element grid;

[0130] Constructing a crack point vector based on the spatial position description point within the finite element;

[0131] Selecting a reference point in the finite element, and constructing a reference vector based on the reference point and the spatial position description point;

[0132] The crack is represented based on the crack point vector and the reference vector.

[0133] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0134] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0135] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0136] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned crack representation method, and can solve the problem that the existing crack description method needs to perform high-dimensional level set function processing and realize complex technical problems. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the crack representation method provided in the above-mentioned embodiment, and will not be repeated here.

[0137] The present application also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the crack representation method as described above are implemented.

[0138] The computer program product provided by the present application can solve the problem that the existing crack description method needs to process high-dimensional level set functions and realize complex technical problems. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as those of the crack representation method provided by the above embodiment, which will not be described in detail here.

[0139] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A crack representation method, characterized in that: The method comprises: Establish finite element mesh based on cracks; Determining a spatial position description point in the crack according to each finite element in the finite element grid; Constructing a crack point vector based on the spatial position description point within the finite element; Selecting a reference point in the finite element, and constructing a reference vector based on the reference point and the spatial position description point; The crack is represented based on the crack point vector and the reference vector.

2. The crack representation method according to claim 1, characterized in that: The step of constructing a crack point vector based on the spatial position description point in the finite element comprises: determining a growth direction of the crack; Based on the growth direction, vectors are constructed for the spatial position description points within each of the finite elements to obtain crack point vectors.

3. The crack representation method according to claim 2, characterized in that: The step of selecting a reference point in the finite element and constructing a reference vector based on the reference point and the spatial position description point comprises: Determining a first crack point and a second crack point of the crack point vector based on the growth direction; the second crack point is an end point of the crack point vector, and the first crack point is a starting point of the crack point vector; A reference point is selected in the finite element, and a reference vector is constructed based on the reference point and the first crack point.

4. The crack representation method according to claim 3, characterized in that: The step of representing the crack based on the crack point vector and the reference vector comprises: Determine the coordinate system vector of the reference point; Determining components and unit step function values ​​based on the coordinate system vector, the crack point vector and the reference vector; The crack is represented by the components and the unit step function value.

5. The crack representation method according to claim 1, characterized in that: The step of determining a spatial position description point in the crack according to each finite element in the finite element grid comprises: Determining the inflection point of the crack and the intersection point between the crack and the boundary of each finite element; The inflection point and the boundary intersection point are used as the spatial position description point of the crack.

6. The crack representation method according to claim 1, characterized in that: The step of selecting a reference point in the finite element and constructing a reference vector based on the reference point and the spatial position description point comprises: Selecting a reference point within the finite element; Determining an integration point based on the spatial position description point; A reference vector is constructed based on the reference point and the integration point.

7. A crack display device, characterized in that: The crack indicating device comprises: A mesh building module for building finite element meshes based on cracks; A description point determination module, used to determine a spatial position description point in the crack according to each finite element in the finite element grid; A vector construction module, used to construct a crack point vector based on the spatial position description point in the finite element; The vector construction module is further used to select a reference point in the finite element and construct a reference vector based on the reference point and the spatial position description point; A crack representation module is used to represent the crack based on the crack point vector and the reference vector.

8. A crack indication device, characterized in that: The device comprises: a memory, a processor, and a crack representation program stored in the memory and executable on the processor, wherein the crack representation program is configured to implement the steps of the crack representation method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium stores a crack representation program, and when the crack representation program is executed by the processor, the steps of the crack representation method according to any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the crack representation method according to any one of claims 1 to 6 are implemented.

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