Tension testing of polycarbonate at high strain rates
Tension testing of polycarbonate at high strain rates
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高应变率下聚碳酸酯的拉伸测试
DOI：
10.1016/j.polymertesting.2009.06.002
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发表时间：
2009-10-01
期刊：
影响因子：
5.1
通讯作者：
Wang, Yu
中科院分区：
文献类型：
--
作者：
Fu, Shunqiang;Wang, Yang;Wang, Yu
采用分离式霍普金森拉杆（SHTB）系统对聚碳酸酯进行了动态拉伸试验。采用预置短金属棒产生入射应力脉冲。控制入射脉冲的形状以满足SHTB一维实验原理的要求。获得了聚碳酸酯在高达1750 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，聚碳酸酯的拉伸行为与应变速率有关。其屈服应力和失稳应变均随应变速率的增大而增大。基于热激活理论，对大应变率范围内的屈服行为进行了模拟。实验数据与模型的相关性较好。(C)2009爱思唯尔有限公司版权所有
Dynamic tensile tests were performed on polycarbonate using a split Hopkinson tension bar (SHTB) system. A prefixed short metal bar was used to generate the incident stress pulse. The shape of the incident pulse was controlled to meet the requirement of the one-dimensional experimental principle of SHTB. The dynamic tensile stress-strain responses of polycarbonate at high Strain rates up to a rate of 1750 s(-1) were obtained. Experimental results indicate that the tensile behavior of polycarbonate is dependent on the strain rate. Its yield stress and unstable strain all increase with the increased strain rate. The yield behavior was modeled for a wide range of strain rates based on the thermally activated theory. The correlation between the experimental data and the model is good. (C) 2009 Elsevier Ltd. All rights reserved