Nonlinear Viscosity Law in Finite-Element Analysis of High Damping Rubber Bearings and Expansion Joints
Nonlinear Viscosity Law in Finite-Element Analysis of High Damping Rubber Bearings and Expansion Joints
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DOI：
10.1061/(asce)em.1943-7889.0000888
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发表时间：
2015-06
期刊：
影响因子：
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通讯作者：
A. Amin;A. R. Bhuiyan;T. Hossain;Y. Okui
中科院分区：
文献类型：
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作者：
A. Amin;A. R. Bhuiyan;T. Hossain;Y. Okui
摘要提出了一种简单的计算策略，用于橡胶类材料有限应变粘超弹性模型的有限元实现。本构模型具有很强的物理意义，因为通过内部变量（例如，过去的最大过应力和当前变形）。为了模拟特殊一维边值问题的应力-应变响应，提出了一种求解橡胶粘性诱导应变率效应的一阶微分方程的方法.该方案是成功的再现高阻尼橡胶试样的实验结果。此外，更广泛的适用性所提出的策略在模拟验证的数值结果与独立的实验上的全尺寸高阻尼橡胶支座具有不同的几何形状和加载速率。分析了形状因子对支座响应的影响。
AbstractA simple computational strategy for finite-element implementation of a finite-strain viscohyperelasticity model for rubber-like materials was developed. The constitutive model has had a strong physical significance because of the explicit consideration of the nonlinear dependence of viscosity through internal variables (e.g., past maximum overstress and current deformation). To simulate the stress-strain response for particular one-dimensional boundary value problems, a scheme for solving the first-order differential equation representing the viscosity-induced strain-rate effect of rubber was proposed. The scheme was successful in reproducing experimental results obtained from high-damping rubber specimens. In addition, the wider applicability of the proposed strategy in simulation was tested by verifying the numerical results with independent experiments on full-scale high-damping rubber bearings with different geometries and loading rates. The effect of shape factor on bearing responses was exam...