Tension testing of silicone rubber at high strain rates
Tension testing of silicone rubber at high strain rates
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高应变率下硅橡胶的拉伸测试
DOI：
10.1016/j.polymertesting.2016.01.021
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发表时间：
2016-04-01
期刊：
影响因子：
5.1
通讯作者：
Zan, Xiang
中科院分区：
文献类型：
--
作者：
Guo, Lingmei;Lv, Yanan;Zan, Xiang
在较宽的应变速率范围内研究了应变速率对填充硅橡胶拉伸行为的影响。采用非接触式光学测量技术，准确获取了准静态加载条件下拉伸试样的变形信息。提出了一种研究橡胶类材料在高应变率下拉伸响应的实验方法。动态拉伸试验采用分离式霍普金森拉杆（SHTB）系统。设计了特定的试件几何形状和夹具连接方式，以满足Hopkinson杆试验中一维试验原理的要求。获得了硅橡胶在高达1400 s（-1）的高应变率下的动态拉伸应力-应变响应。实验结果表明，所采用的实验技术是测试软材料在高应变率下拉伸响应的合理方法，硅橡胶的拉伸行为对应变率有很大的依赖性。在给定的伸长率下，刚度和名义应力的值都随着应变速率的增加而增加。根据不可压缩假设，提出了一种基于唯象的粘超弹性本构模型，用于描述硅橡胶在较宽应变率范围内的拉伸行为。(C)2016爱思唯尔有限公司版权所有
The effect of strain rate on the tension behavior of filled silicone rubber was investigated over a wide range of strain rates. A non-contact optical measurement technique was used to accurately capture the deformation information of the tensile specimen under quasi-static loading conditions. Experimental methodology to investigate the tension response of rubber-like materials at high strain rates is presented. Dynamic tensile tests were performed using a split Hopkinson tension bar (SHTB) system. Specific specimen geometry and grip connection were designed to meet the requirements of one-dimensional experimental principle in the Hopkinson bar tests. The dynamic tensile stress-strain response of silicone rubber at high strain rates up to 1400 s(-1) was obtained. Experiments reveal that the adopted experimental technique is reasonable for testing the tension response of soft materials at high strain rates, and the tensile behavior of silicone rubber is greatly dependent on the strain rate. The values of stiffness and nominal stress at a given elongation all increase with increased strain rate. According to the incompressible assumption, a phenomenological-based visco-hyperelastic constitutive model is proposed to describe the tensile behavior of silicone rubber over a wide range of strain rates. (C) 2016 Elsevier Ltd. All rights reserved.