The Identification of Aluminums Johnson-cook Model under Hypervelocity Impact Conditions

摘要：

How to describe the material characteristics under high pressure and high strain rate is a key factor in hypervelocity impact problems using the numerical simulation methods. In this article, a SRSM (Successive response surface method) optimization method combined the physical experiments with SPH( Smooth Particle Hydrodynamic) numerical simulation is adopted to identify these five parameters for aluminum Johnson-cook model. Using the optimized parameters can acquire the batter results than the origin parameters which are tested directly from the lab. The validity and the reliability of material parameters can be improved by this optimization method.

关键词： Hypervelocity Impact SPH Johnson-cook Ls-opt Parameter Identification

作者: Hu Zhendong Huang Hai Jia Guanghui

作者单位: Beijing University of Aeronautics and Astronautics,Beijing 100083 Beijing University of eronautics and Astronautics,Beijing 100083

会议类型: 国际会议

会议名称: The 11th International Space Conference of Pacific-basin Societies(第11届环太平洋国际航天会议)

会议地点: 北京

会议语种:英文

页码: 21-25

在线出版日期: 2007-05-16（万方平台首次上网日期，不代表论文的发表时间）