爆轰加载下锡金属连续层裂损伤机理的数值分析

Numerical Analysis of High Explosive-Induced Multiple Layers in Sn Metal

结合实验对所采用的计算程序和损伤模型进行验证,在此基础上开展了爆轰加载下锡材料连续层裂损伤机理研究。结果显示:锡靶板的破坏模式与加载强度、加载波形以及靶板的几何结构相关;材料初始微结构的作用反映在对临界截止孔隙度的影响上,进而影响靶板的损伤破坏;损伤模型中临界截止孔隙度越大,靶板的破坏程度越小。此外,材料拉伸、压缩损伤的计算结果与相应实验结果的对比显示,材料的损伤主要以拉伸损伤破坏为主。

After validating our hydrodynamics program and damage model with the corresponding experimental data,we carried out numerical simulation study on the damage and spall mechanism of Sn under the explosive detonation loading. The numerical results show that the damage in Sn sample is related to the loading intensity,the wave profile and the sample size;the initial mierostructure of the material will act on the critical fracture damage and then affect the damage and spall in the sample, and the damage decreases with the increase of the critical fracture damage. Moreover, the comparison of the numerical results with the experimental results on the tension and compression damages indicates that the tension damage plays a decisive role in material damage.