基于拉压不同模量弹性理论的子午线轮胎有限元分析

Finite Element Analysis of Radial Tire Based on Elastic Theory of Different Modulus in Tension and Compression

汽车行驶过程中轮胎各部位受力状态随着整车载荷转换而变化。作为子午线轮胎关键受力部件的带束层,其在受拉和受压时呈现出不同的变形状态与力学性能。基于拉压不同模量弹性理论,通过编写UPFs(User Programmable Features)材料子程序,对ANSYS软件进行二次开发,将带束层材料设置为不同的拉伸弹性模量与压缩弹性模量,模拟子午线轮胎充气和越障滚动工况。结果表明,考虑轮胎骨架材料在拉伸与压缩时的不同力学特性,更符合轮胎实际结构特征。该方法对准确仿真轮胎受力状态及轮胎结构设计优化有一定的参考价值。

When the vehicle is running,the stress state of each part of the tire changes with the load conversion of the whole vehicle.The belt layer,which is the key stress component of radial tires,exhibits different deformation states and mechanical properties when under tension and compression.Based on the elastic theory of different modulus in tension and compression,the material subprogram of UPFs(User Programmable Features)was compiled,and the secondary development of ANSYS software was carried out.The belt material was set to different tensile modulus and compressive modulus to simulate the inflation and obstacle crossing rolling conditions of radial tire.The results showed that it was more consistent with the actual structural characteristics of the tire by considering the different mechanical properties of tire skeleton material in tension and compression.This method had certain reference value for accurately simulating the tire stress state and tire structure design optimization.