摘要
金属爆炸焊接材料的基、复板在炸药爆轰作用下产生的碰撞力是基、复板实现爆炸焊的关键条件。采用瑞利—里兹法计算模型,根据弹性力学的变分原理,将弹性力学问题表述为泛函驻值问题,使泛函驻值的条件对应于所解问题的基本方程和边界条件,从而推导出微分方程及对应的边界条件。计算碰撞点处的瞬时应力场,同时对不同的碰撞角和碰撞压力进行了模拟计算,发现了碰撞点处的应力场分布的基本规律。其应力场分布规律完全可以用于评价和指导实际的工程实践。
The impact pressure produced by explosive detonation is essential condition of the base plate and cladding plate coalescence for metal explosion welding. Based on Rayleigh-Ritz calculating model and elasticity variation principle, elasticity problem is considered as functional arrest ental equation, and boundary condition of the problem is given. Differential equation and corresponding boundary condition are derived. Instantaneous stress field at impact points was calculated, and analog calculating of different collision angles and impact pressures were carried out. Basic law of stress field distribution at impact points was found. The calculating stress field distribution law can be applied to evaluation and guidance of practical engineering.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2006年第10期26-28,93,共4页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(50475109
10172042)
关键词
爆炸焊接
计算模型
碰撞压力
应力场
数值计算
explosive welding
calculation model
impact pressure
stress field
value calculation
