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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >An improved rheology model for the description of the rate-dependent cyclic behavior of high damping rubber bearings
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An improved rheology model for the description of the rate-dependent cyclic behavior of high damping rubber bearings

机译：改进的流变模型，用于描述高阻尼橡胶轴承的速率相关的循环行为

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摘要

An improved rheology model, inspired from explicit experiments is conceived to represent rate-dependent cyclic shear behavior of high damping rubber bearings at subzero and room temperatures. Total stress has been decomposed into nonlinear rate independent elasto-plastic stress, nonlinear elastic stress and nonlinear visco-elasto-plastic overstress branches. To represent nonlinear viscosity behavior, 'overstress branch' has been generalized by putting linear elastic spring in parallel to nonlinear elasto-plastic model, placed in series with nonlinear dashpot. Constitutive relations for model elements have been designated for respective fundamental phenomenon observed in constant strain rate experiments. An optimum calculation approach is developed to determine a unique set of overstress parameters capable not only of representing constant strain rate cyclic tests but also sinusoidal tests with variable input strain rates. Essential abilities of the proposed model and adequacy of estimated parameters have been confirmed by comparing numerical simulation results with experiments conducted at -30 degrees C, -10 degrees C and 23 degrees C. (C) 2015 Elsevier Ltd. All rights reserved.
机译：改进的流变模型受显式实验的启发，被认为可以代表零阻尼和室温下高阻尼橡胶轴承的速率相关循环剪切行为。总应力已分解为与速率无关的非线性弹塑性应力，非线性弹性应力和非线性粘弹塑性过应力分支。为了表示非线性粘度行为，通过将线性弹性弹簧与非线性弹塑性模型（与非线性阻尼器串联）并联，来概括“超应力分支”。对于在恒定应变率实验中观察到的各个基本现象，已经指定了模型元素的本构关系。开发了一种最佳计算方法来确定一组独特的过应力参数，这些参数不仅可以表示恒定的应变率循环测试，而且还可以表示输入应变率可变的正弦测试。通过将数值模拟结果与在-30摄氏度，-10摄氏度和23摄氏度下进行的实验进行比较，已证实了所提出模型的基本能力和估计参数的充分性。（C）2015 Elsevier Ltd.保留所有权利。

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