高强石墨材料的动态本构模型
Dynamic Constitutive Model of High-Strength Graphite Material
摘 要
利用分离式Hopkinson压杆试验装置对SMF-800高强石墨进行了冲击压缩试验,获得了不同应变速率(618,868,1 185 s-1)下的应力-应变曲线;采用损伤型朱-王-唐粘弹性本构模型和一维弹脆性损伤本构模型分别对应力-应变曲线进行拟合,并对拟合结果进行了对比.结果表明:高强石墨材料的破坏应力和应变随着应变速率的增大而不断增大;损伤型朱-王-唐粘弹性本构模型比一维弹脆性本构模型更能有效描述高强石墨材料的动态力学性能,在应变速率为618,868,1 185 s-1时,前者拟合曲线的相关指数分别为0.992 15,0.999 52,0.972 15.
动态力学性能
分离式Hopkinson压杆
朱-王-唐粘弹性本构模型
high-strength graphite
dynamic mechanical property
split Hopkinson pressure bar(SHPB)
ZWT viscoelastic constitutive model
Abstract
Impact compression tests of high-strength graphite SMF-800 were carried out using a split Hopkinson pressure bar(SHPB) testing system,and the stress and strain curves at strain rates of 618,868 s-1and 1 185 s-1 were obtained.And the stress-strain curves were fitted by the damage ZWT viscoelastic constitutive model and the one dimensional elastic brittle damage constitutive model,and fitting results were compared.The results show that the destruction stress and strain increase with the increase of strain rate.The damage ZWT viscoelastic constitutive model is more effective than the one dimensional elastic brittle damage constitutive model to describe the dynamic mechanical properties of the high-strength graphite material.Moreover,the fitting related indexes of the damage ZWT viscoelastic constitutive model were up to 0.992 15,0.999 52 and 0.972 15,respectively,at strain rates of 618,868 s-1and 1 185 s-1.
中图分类号 TH145.1
所属栏目 物理模拟与数值模拟
基金项目 国家科技重大专项基金资助项目(2012ZX04003051-5)
收稿日期 2013/10/25
修改稿日期 2014/10/10
网络出版日期
作者单位点击查看
备注唐文波(1986-),男,湖南邵阳人,硕士研究生.
引用该论文: TANG Wen-bo,LIU De-shun,TANG Si-wen,LI Peng-nan. Dynamic Constitutive Model of High-Strength Graphite Material[J]. Materials for mechancial engineering, 2015, 39(3): 84～88
唐文波,刘德顺,唐思文,李鹏南. 高强石墨材料的动态本构模型[J]. 机械工程材料, 2015, 39(3): 84～88
被引情况:
【1】王文东,薛春,熊蜀冰, "γ射线辐照前后高强石墨的摩擦学行为及其磨损机制",机械工程材料 40, 66-69(2016)
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