Study on the mechanism of spallation in an Al-Li alloy

摘要：

　　In order to study the spalling phenomenon of Al-Li alloys, a modified Johnson-Cook constitutive model was first presented based on experimental data.Then, a damage evolution equation based on the concept of damage evolution is proposed and applied as thespallation criterion for Al-Li alloy material.The relative parameters of the spallation criterion were obtained by comparing the results of numerical simulation with flyer-plate-impact experiments.The consistency between the numerical simulation results and the experimental results verifies the correctness of the constitutive model and the spallation criterion proposed in this paper.The results can provide a theoretical basis for the study of the mechanism of spallation in an Al-Li alloy.

关键词： Constitutive model Numerical simulation Aluminium alloy Spallation criterion

作者: Rui-yuan HUANG Shi-chao LI Dong JIANG Liang-liang HU

作者单位: National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing Beijing Institute of Space Long March Vehicle, Beijing 100076, China

会议类型: 国际会议

会议名称: 2018 International Conference on Defence Technology (2018国际防务技术会议)

会议地点: 北京

会议语种:英文

页码: 422-426

在线出版日期: 2018-10-21（万方平台首次上网日期，不代表论文的发表时间）