橡胶减震器在使用过程中呈现时变蠕变特性，影响其工作性能及使用寿命。基于超弹力学及损伤力学理论，建立橡胶材料考虑损伤效应的唯象蠕变本构模型；根据试验结果，识别模型关键参数，开展材料本构模型与有限元模拟的相容性研究，构建橡胶减震器非线性时变蠕变数值模拟方法。采用Von Mises屈服准则来评估橡胶材料的蠕变残余变形，发展一种考虑永久变形的修正蠕变本构模型。研究成果可为橡胶减震器的时变性能分析及寿命预测提供理论基础。
The rubber shock absorber presents time-depending creep characteristics in the use process, which affects its working performance and service life. Based on the theory of hyperelasticity and damage mechanics, the phenomenological creep constitutive model of rubber material considering damage effect is established; based on the test results, the key parameters of the model are identified; the compatibility between material constitutive model and finite element simulation is studied, and the nonlinear time-depending creep numerical simulation method of rubber shock absorber is constructed. Von Mises yield criterion is used to evaluate the residual creep deformation of rubber materials. A modified creep constitutive model considering permanent deformation is developed. The research results can provide theoretical basis for time-depending performance analysis and life prediction of rubber shock absorbers.
2021,43(1): 95-101 收稿日期：2020-04-26
DOI：10.3404/j.issn.1672-7649.2021.01.017
分类号：TG15
作者简介：马永(1978-),男,高级工程师。主要研究方向为水下发射技术
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