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工程力学  2014 

一种钢板材料动态拉伸本构方程确定以及试件尺度效应研究

DOI: 10.6052/j.issn.1000-4750.2012.09.0669, PP. 236-242

Keywords: Hopkinson拉伸试验,数值模拟,动态拉伸本构方程,试件尺度效应,QP980CR钢

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Abstract:

采用数值模拟方法,优化设计了Hopkinson拉伸实验中,QP980CR钢的片状试件尺度。对所设计的试件,在MTS(810材料试验机)上进行了准静态拉伸试验,在Hopkinson拉杆装置上进行了不同应变率及不同温度的动态拉伸试验。由准静态及动态拉伸试验结果,确定了试件材料的J-C型动态拉伸本构方程。基于确定的试件动态拉伸本构方程,采用数值模拟方法,研究了Hopkinson拉伸试验中,试件的形状和尺度对测试结果的影响。

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