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Identification method for the material parameters of Al alloy under the condition of hypervelocity impact
Hu Zhendong, Huang Hai, Jia Guanghui*
School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ �ڳ�����ײ��������,���������ڴ���Ρ���Ӧ���������µIJ��ϲ�����ȡ��һ���о��ѵ�.��ȷ��Steinberg����ģ�ͺ�Gruneisen״̬����ǰ����,������е�����������,����SPH(Smooth Particle Hydrodynamic)�㷨ʵ�ֳ�����ײ���������ֵģ��,�����Ż�Ŀ��Ϊ�����������ͷ�����֮���������ֵ,����������Ӧ�淨SRSM(Successive Response Surface Method)�����Ͻ�6061��Steinberg����ģ���е�4���ؼ����������Ż�ʶ�����.����ʶ��IJ��ϲ�������������Ľ�����Ƴ̶ȸ���,֤�������ַ�������ȷ�ԺͿɿ���.
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Abstract�� In the research of hypervelocity impact, how to identify the metallic material’s parameters under the extreme distortions and high strain rate is a key problem. Steinberg strength model and Gruneisen equation of state were selected to describe the characteristics of Al6061 under the condition of hypervelocity. The SPH algorithm was applied to simulate the hypervelocity impact. The error between the results of experiment and simulation was defined as the optimization objective and 4 parameters in Steinberg strength model were defined as optimization variables. Four parameters were identified automatically by successive response surface method(SRSM). The optimized parameters have a better simulation results than the initial parameters when comparing with the experiments results.
Keywords�� hypervelocity impacts   numerical simulation   identification     
Received 2007-08-02;
About author: ����(1978-),��,������������,��ʿ��,buaahuzd@sa.buaa.edu.cn.
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����,�ƺ�,�ֹ��.������ײ�����������Ͻ���ϲ���ʶ�𷽷�[J]  �������պ����ѧѧ��, 2008,V34(09): 999-1002
Hu Zhendong, Huang Hai, Jia Guanghui.Identification method for the material parameters of Al alloy under the condition of hypervelocity impact[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(09): 999-1002
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2008/V34/I09/999
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