A tire failure point simulation analysis method, application, device and computer program product

Abstract

The present invention relates to the technical field of computer simulation design of tires, and in particular to a simulation analysis method, application, device and computer program product of tire failure points. A simulation analysis method of tire failure points, the method comprising the following steps: 1) Modeling the tire using modeling software and simulation software, meshing the model material distribution diagram, assigning material properties, applying air pressure and load, and performing load analysis; setting the angular velocity of the model and performing rolling analysis; obtaining the stress, strain, and strain energy values ​​of all rubber material units of the model; 2) Using a program to perform computational processing on the data, reading the simulation model data information, visualizing the model and providing an interactive function for the user to select the required analysis unit, and obtaining tire failure evaluation parameters. The present invention only requires virtual simulation modeling operations, which is simpler, low-carbon and environmentally friendly than physical testing. It plays a guiding role in optimizing and improving the design of tire products.

Description

Technical Field

[0001] The present invention relates to the technical field of tire computer simulation design, and in particular to a tire failure point simulation analysis method, application, equipment and computer program product. Background Art

[0002] In the first half of 2021, the total production of commercial vehicles in China was 2.73 million units, a year-on-year increase of 15.7%; the sales volume of commercial vehicles was 2.884 million units, a year-on-year increase of 20.9%. Automobiles make human transportation efficient, and the movement of automobiles depends on tires. Tires are the only parts of automobiles that are in contact with the ground. With the exchange of information, tire performance and safety are gradually valued by drivers. Tire failure is one of the core parts of tire performance research. Tires bear and transmit all the forces between vehicles and roads, and produce complex deformations under the action of various external forces. Friction caused by deformation leads to energy loss, generates a lot of heat, increases tire temperature and reduces strength. Tire damage, excluding uncontrollable road factors and operating conditions, is mostly the result of thermal coupling. Therefore, studying the working conditions of tires and mastering the laws of tire damage are important for improving tire performance, extending tire service life and protecting the personal safety of users.

[0003] At present, there are mainly two methods for measuring and evaluating tire failure points: test method and finite element simulation method. The test method can roughly obtain the actual results, but it is necessary to make and test the test tire, which is costly, long, not environmentally friendly, and cannot obtain the internal mechanical characteristics of the tire; the finite element simulation method is low-cost, short-cycle, and can intuitively obtain the deformation and stress state of the tire, which is convenient for analyzing the influence of structure and material on tire deformation. At present, the simulation analysis research mainly focuses on the overall deformation and stress of the tire. As a composite rubber material, the stress condition of the tire is very complex, and the six component data contained in stress and strain are complicated. This has limited guiding role in tire failure analysis, and it is not possible to analyze possible failure points through corresponding indicators to further optimize the design scheme. Summary of the invention

[0004] In order to solve the above problems in the prior art, the purpose of the present invention is to provide a tire failure point simulation analysis method, which realizes the analysis of the failure points caused by the tire product design scheme itself.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A tire failure point simulation analysis method, the method comprising the following steps:

[0007] 1) Model the tire using modeling software and simulation software, mesh the model material distribution map, assign material properties, apply air pressure and load, and perform load analysis; set the angular velocity of the model and perform rolling analysis; obtain the stress, strain, and strain energy values ​​of all rubber material units in the model;

[0008] 2) Using the program to process the data, read the simulation model data information, visualize the model and provide interactive functions for users to select the required analysis units to obtain tire failure evaluation parameters;

[0009] The failure evaluation parameter X is defined as:

[0010] X=AΩ+Bλ+CE

[0011] In the formula, ABC are weight coefficients, C is 0.2-0.3, A and B are 0.1-0.7;

[0012]

[0013] N is the number of sections of the simulation model, Ω 11 is the stress in the x-axis direction of the model, Ω 22 is the stress in the y-axis direction of the model, Ω 33 is the stress in the z-axis direction of the model, Ω 12 is the stress along the y-axis in the xy plane of the model, Ω 23 is the stress along the z-axis in the yz plane of the model, Ω 13 is the stress along the z-axis in the xz plane of the model;

[0014]

[0015] N is the number of sections of the simulation model, λ 11 is the stress in the x-axis direction of the model, λ 22 is the stress in the y-axis direction of the model, λ 33 is the stress in the z-axis direction of the model, λ 12 is the stress along the y-axis in the xy plane of the model, λ 23 is the stress along the z-axis in the yz plane of the model, λ 13 is the stress along the z-axis in the xz plane of the model;

[0016] E=Max(E N )-Min(E N )

[0017] Max(E N ) is the maximum strain energy in all sections of the unit, Min(E N ) is the minimum strain energy in all sections of the unit.

[0018] Preferably, in step 1), the tire material distribution map is meshed into polygonal units with sides ≤ 4, the skeleton material is divided into two-node one-dimensional units, and properties are assigned to the materials of each component to establish a tire finite element model.

[0019] Preferably, the materials of the components include apex glue, upper apex glue, lower apex glue, inner lining layer, cap layer 1, cap layer 2, wrapping cloth, wrapping cloth 1, wrapping cloth 2, wrapping cloth 3, wrapping cloth 4, base glue, interlayer glue, sub-mouth protective glue, sealant, nylon, cord 1 and cord 2.

[0020] Preferably, in the step 1), an air pressure of 800-950 KPa is applied to the inner cavity of the tire, and inflation analysis is performed using Abaqus software; based on the two-dimensional inflation analysis, the tire section is rotated 360 degrees, and the section is divided in the circumferential direction, and one circle is divided into 70-80 sections. The tire rim is fixed, and a load of 3000-4000 kg and an angular velocity of 40-60 s are applied to the road surface, so that the road surface moves toward the rim direction, a rolling analysis is performed, and the stress and strain values ​​of all rubber material units are output.

[0021] Preferably, A is 0.4-0.6, B is 0.2-0.4, and C is 0.2-0.3.

[0022] Preferably, the larger the value of the failure evaluation parameter X is, the higher the energy loss and the more severe the deformation amplitude of the tire model part where the unit is located in this simulation model compared with the tire model parts where other units are located, and the more likely it is to become a damage point during tire operation.

[0023] Furthermore, the invention also discloses application of the method in designing an all-steel radial tire.

[0024] Furthermore, the present invention also discloses a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the method.

[0025] Furthermore, the present invention also discloses a computer-readable storage medium on which a computer program or instruction is stored, wherein the method is implemented when the computer program or instruction is executed by a processor.

[0026] Furthermore, the present invention also discloses a computer program product, including a computer program or instructions, which implement the method when executed by a processor.

[0027] The present invention adopts the above technical solution and innovatively proposes a tire performance prediction and evaluation method, which only requires virtual simulation modeling calculation, which is simpler, low-carbon and environmentally friendly than physical testing. The mathematical model for parameter calculation is proposed by combining tire design theory and a large amount of actual test data, which plays a guiding role in product design optimization and improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A tire finite element model diagram established for a specific embodiment of the present invention.

[0029] Figure 2 This is a finite element model diagram of inflation analysis performed using Abaqus software according to a specific embodiment of the present invention.

[0030] Figure 3 This is a finite element model diagram of a tire section rotated 360 degrees in a specific embodiment of the present invention, and the section is divided in the circumferential direction, so that one circle is divided into 74 sections.

[0031] Figure 4 A data graph of stress and strain values ​​for all rubber material elements is output for this embodiment of the invention.

[0032] Figure 5 The data diagram of the true stress and strain values ​​of the units at the same position and different angles around the tire is extracted by using the program of the present invention.

[0033] Figure 6 This is a result diagram obtained by analyzing tire failure evaluation parameters according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0034] The specific implementation modes of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] The present invention takes 315 / 60R22.5 tire as an example, and divides the tire material distribution map into grids, which are divided into polygonal units with edges ≤ 4 ( Figure 1 ), the skeleton material is divided into two-node one-dimensional units, and the properties of each component material are assigned (Table 1) to establish a tire finite element model. 900Kpa air pressure is applied to the tire cavity, and inflation analysis is performed using Abaqus software. The results are as follows Figure 2 shown.

[0036] Based on the two-dimensional inflation analysis, the tire section is rotated 360 degrees and divided into 74 sections in the circumferential direction ( Figure 3 ), and fix the tire rim, apply a load of 3550kg and an angular velocity of 48.209s to the road surface, make the road surface move toward the rim, perform rolling analysis, and output the stress and strain values ​​of all rubber material units ( Figure 4 ).

[0037] Table 1

[0038]

[0039] The program of the present invention is used to extract the true stress and strain values ​​of the unit at different angles at the same position around the tire (including 11 directions, 22 directions, 33 directions, 12 directions, 13 directions and 23 directions, such as Figure 5 The parameter X result is obtained by calculating the strain value through the above formula X=AΩ+Bλ+CE. In the formula, ABC are weight coefficients, A=0.5, B=0.3, and C=0.2.

[0040]

[0041] N is the number of sections of the simulation model, Ω 11 is the stress in the x-axis direction of the model, Ω 22 is the stress in the y-axis direction of the model, Ω 33 is the stress in the z-axis direction of the model, Ω 12 is the stress along the y-axis in the xy plane of the model, Ω 23 is the stress along the z-axis in the yz plane of the model, Ω 13 is the stress along the z-axis in the xz plane of the model;

[0042]

[0043] N is the number of sections of the simulation model, λ 11 is the stress in the x-axis direction of the model, λ 22 is the stress in the y-axis direction of the model, λ 33 is the stress in the z-axis direction of the model, λ 12 is the stress along the y-axis in the xy plane of the model, λ 23 is the stress along the z-axis in the yz plane of the model, λ 13 is the stress along the z-axis in the xz plane of the model;

[0044] E=Max(E N )-Min(E N )

[0045] Max(E N ) is the maximum strain energy in all sections of the unit, Min(E N ) is the minimum strain energy in all sections of the unit.

[0046] By analyzing the tire failure evaluation parameters obtained by the above technology, it can be concluded that the X value of the belt layer endpoint and the triangle and ladle contact point of the model tire is relatively large when it is rolling steadily ( Figure 6), the possibility of failure and damage during tire operation is relatively higher. The structure and formula of related components can be adjusted based on the conclusion, which is consistent with the experience of previous test results.

[0047] The above is a description of the embodiments of the present invention. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the present invention. Various modifications to these embodiments will be apparent to professionals and technicians in the field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown in this article, but will conform to the widest range consistent with the principles and novelties disclosed herein.

Claims

1. A tire failure point simulation analysis method, characterized in that: The method comprises the following steps: 1) Use modeling software and simulation software to model the tire, mesh the model material distribution map, assign material properties, apply air pressure and load, and perform load analysis; set the angular velocity of the model and perform rolling analysis; Obtain the stress, strain, and strain energy values ​​of all rubber material units in the model; 2) Use the program to process the data, read the simulation model data information, visualize the model and provide interactive functions for users to select the required analysis units to obtain tire failure evaluation parameters; The failure evaluation parameter X is defined as: X=AΩ+Bλ+CE In the formula, ABC are weight coefficients, C is 0.2-0.3, A and B are 0.1-0.7; N is the number of sections of the simulation model, Ω 11 is the stress in the x-axis direction of the model, Ω 22 is the stress in the y-axis direction of the model, Ω 33 is the stress in the z-axis direction of the model, Ω 12 is the stress along the y-axis in the xy plane of the model, Ω 23 is the stress along the z-axis in the yz plane of the model, Ω 13 is the stress along the z-axis in the xz plane of the model; N is the number of sections of the simulation model, λ 11 is the stress in the x-axis direction of the model, λ 22 is the stress in the y-axis direction of the model, λ 33 is the stress in the z-axis direction of the model, λ 12 is the stress along the y-axis in the xy plane of the model, λ 23 is the stress along the z-axis in the yz plane of the model, λ 13 is the stress along the z-axis in the xz plane of the model; Max(E N ) is the maximum strain energy in all sections of the unit, Min(E N ) is the minimum strain energy in all sections of the unit.

2. A tire failure point simulation analysis method according to claim 1, characterized in that: In step 1), the tire material distribution map is meshed into polygonal units with edges ≤ 4, the skeleton material is divided into two-node one-dimensional units, and properties are assigned to the materials of each component to establish a tire finite element model.

3. A tire failure point simulation analysis method according to claim 1, characterized in that: The materials of each component include apex glue, upper apex glue, lower apex glue, inner lining layer, cap layer 1, cap layer 2, wrapping cloth, wrapping cloth 1, wrapping cloth 2, wrapping cloth 3, wrapping cloth 4, base glue, interlayer glue, sub-mouth protective glue, sealant, nylon, cord 1 and cord 2.

4. A tire failure point simulation analysis method according to claim 1, characterized in that: In step 1), an air pressure of 800-950Kpa is applied to the inner cavity of the tire, and an inflation analysis is performed using Abaqus software; based on the two-dimensional inflation analysis, the tire section is rotated 360 degrees, and the section is divided circumferentially, with one circle divided into 70-80 sections. The tire rim is fixed, and a load of 3000-4000kg and an angular velocity of 40-60s are applied to the road surface, so that the road surface moves toward the rim direction, a rolling analysis is performed, and the stress and strain values ​​of all rubber material units are output.

5. A tire failure point simulation analysis method according to claim 1, characterized in that: A is 0.4-0.6, B is 0.2-0.4, and C is 0.2-0.

3.

6. A tire failure point simulation analysis method according to claim 1, characterized in that: The larger the failure evaluation parameter X value is, the higher the energy loss and the more severe the deformation amplitude of the tire model where the unit is located in this simulation model compared with the tire model where other units are located, and the more likely it is to become a damage point during tire operation.

7. Application of the method according to any one of claims 1 to 6 in the design of all-steel radial tires.

8. A computer device comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: When the computer program or instruction is executed by a processor, the method described in any one of claims 1 to 6 is implemented.

10. A computer program product comprising a computer program or instructions, characterized in that When the computer program or instruction is executed by a processor, the method described in any one of claims 1 to 6 is implemented.

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