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含能材料  2014 

底排药的高应变率动态响应实验和仿真

DOI: 10.3969/j.issn.1006-9941.2014.04.020

Keywords: 冲击动力学,底排药,高应变率,朱王唐本构,霍普金森压杆(SHPB)

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Abstract:

利用直径14.5mm铝制霍普金森压杆(SHPB),对直径为10mm的底排药柱试样进行应变率在103s-1量级的单轴压缩试验。实验结果表明底排药具有明显的应变率效应。利用朱王唐粘弹性本构关系,采用最小二乘法,依据实验数据拟合出朱王唐本构材料参数,并利用LS-DYNA软件的二次开发功能将拟合出的朱王唐粘弹性本构嵌入LS-DYNA软件中,进行SHPB的数值仿真模拟,与实验对比表明在应变小于0.03弹性范围内仿真模型能够很好地描述底排药高应变率力学特性。

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