基于试验数据识别的金属橡胶有限元仿真方法

金属橡胶工程应用分析常需要1种可以与商用有限元软件相结合,适用于复杂结构设计的快捷数值仿真方法。针对金属橡胶的有限元仿真问题,基于ANSYS软件,发展了基于试验数据识别的横向各向同性材料参数确定方法,并采用循环加载、模型更新的方法,实现了金属橡胶材料受压过程非线性力学特性的仿真计算。结果表明:该方法对立方体件在无约束状态下受压过程进行模拟时,相对误差在10%之内;安装约束使其刚度增大,仿真与试验结果相比规律吻合,刚度的误差在30%之内;环形金属橡胶件在径向受压时,仿真与试验测得刚度的相对误差在25%之内。

Finite Element Simulation Method of Metal Rubber Based on Tested Parameter Identification

During the metal rubber''s (MR) engineering application, a numerical method with fast solving speed that is suitable forcomplex configurations is required. It is also hoped that the method could be combined with the commercial finite element softwareconsidering the engineers'' requirements. Aiming at solving the finite element simulation problems of MR, the paper developed a parameteridentification method for the transverse isotropy materials based on the tested data. The nonlinear mechanical characteristics of MR duringcompression process were calculated through the looping loading and model updating method. The results reveal that the relative errorbetween predicted and tested result of cubic MR model without constraint is less than 10% and less than 30% for cubic MR underconstraint. The constraint also leads to larger stiffness of MR. The relative error of ring MR model under radial loading is holded within 25%