鞋底-鞋垫减震性能材料测试有限元仿真分析

Finite Element Simulation Analysis of Material Testing for Shock-Absorbing Performance of Sole-Insole

文章研究了鞋底-鞋垫减震性能材料测试有限元仿真分析方法及有效性。以不同硬度材料的鞋底-鞋垫组合为研究对象,采用3D扫描和逆向工程技术获取了鞋底-鞋垫与冲击头的有限元模型。对鞋底-鞋垫材料标准件进行压缩力学性能测试,获取不同鞋底-鞋垫材料的力-位移曲线,拟合鞋底、鞋垫常用的橡胶材料和乙烯醋酸乙烯酯材料本构模型,定义鞋底-鞋垫材料参数。采用三维动态有限元技术,仿真了6种高度下18种鞋底-鞋垫组合冲击测试,采用Bland-Altman差值分析法,验证有限元仿真与材料冲击测试法在鞋底-鞋垫减震性能冲击力峰值指标上的一致性。有限元仿真分析可以代替Impact Plus 5.0冲击试验机获取不同硬度鞋底-鞋垫组合减震性能的冲击力峰值指标,分析其减震性能,并依此指导鞋底-鞋垫组合材料的选用及减震结构优化,提高鞋底-鞋垫整体减震性能。

This paper studied the method and effectiveness of finite element simulation analysis for testing the shock absorption performance of shoe soles and insoles.The finite element model of the sole-insole and impact head was obtained by using 3D scanning and inverse engineering techniques with different hardness materials of the sole-insole combination as the research object.The force-displacement curves of different sole-insole materials were obtained by compressive mechanical performance tests on the standard parts of the sole-insole materials,and the ontological models of rubber and Ethylene Vinyl Acetate materials commonly used for soles and insoles were fitted to define the parameters of the sole-insole materials.A three-dimensional dynamic finite element technique was used to simulate the impact tests of 18 sole-insole combinations at six heights.The Bland-Altman difference analysis method was used to verify the consistency between the finite element simulation and the material impact testing method in terms of the peak impact force index of the shock absorption performance of the sole-insole.The finite element simulation analysis can replace the Impact Plus 5.0 impact testing machine to obtain the peak impact force index of different sole-insole cushion combination damping performance,analyze the damping performance,and guide the selection of sole-shoe cushion combination materials and the optimization of damping structure,so as to improve the overall damping performance of sole-shoe cushion.