爆炸与冲击2017，Vol.37Issue(4)：699-704,6.DOI:10.11883/1001-1455(2017)04-0699-06
含氦泡金属铝层裂响应的数值分析
Numerical analysis of spall response in aluminum with helium bubbles
摘要
Abstract
The creation of helium atoms is one of the main damaging mechanisms in neutron irradiated metals and is therefore a major concern in related scientific research.Recent researches under static loading conditions showed that the creation of helium atoms in metals is of great academic signifi cance,for their precipitation into bubbles can cause substantial deterioration of the mechanical properties of materials.In this paper,based on experimental results so far published,a damage model is adopted combining inertial effect,initial void size and damage,to investigate the influence of helium bubbles in aluminum on its dynamic spall properties.The numerical calculation results show that the damage growth is insensitive to the pressure inside the bubble and the temperature produced by plastic deformation;the inner stress decreases more quickly and the porosity increases more slowly with the increase of the initial damage;the damage increases more slowly with the increase of the initial size of the helium bubble due to the inertial effect.Therefore,the study on the spall response of metals with helium bubbles should focus on the initial size of the helium bubble,the initial damage and the inertial effect at high loading rates.关键词
氦泡/层裂响应/铝/数值分析Key words
helium bubbles/spall response/aluminum/numerical analysis分类
数理科学引用本文复制引用
张凤国,胡晓棉,王裴,邵建立,周洪强,冯其京..含氦泡金属铝层裂响应的数值分析[J].爆炸与冲击,2017,37(4):699-704,6.基金项目
国家自然科学基金项目(U1530261,11372052,11572054) （U1530261,11372052,11572054）
计算物理重点实验室基金项目 （）
