摘要
利用非线性显式动力学软件AUTODYN-2D对Monel合金/Cu爆炸复合棒进行二维复合过程模拟。再现了爆炸复合过程,模拟了射流产生、波形界面等爆炸复合的特殊现象,得到了碰撞区域压力、速度、应力、等效塑性应变、等效塑性应变率和温度的分布情况,所得动态参数的模拟结果与理论计算相符。碰撞区域的应变及应变率分布表明:在界面处存在一层剧烈的剪切变形区;碰撞区域温度分布表明:碰撞点及射流最高温度都达到了基体Cu的熔点,说明爆炸复合是一种达到材料熔点的冶金结合,且界面两侧区域均有明显的温度梯度,存在热影响区。
The explosive cladding process of Monel alloy/Cu bar was numerically simulated by nonlinear explicit dynamic software AUTODYN-2D. During the whole process,jetting formation,wavy interface generation and development were computationally reproduced. Pressure,velocity,stress,effective plastic strain,strain rate and temperature distributions in collision region were predicted and numerically analyzed. From the distribution of strain and strain rate in collision region,a very thin layer of severely-shear-deformed zone closing to the bonding interface could be illustrated. The temperature distribution showed melting point of copper was achieved at collision point,and the cladding was a metallurgical bonding process,and temperature gradient in the vicinity of interface revealed heat affected zone.
出处
《焊接技术》
北大核心
2009年第8期8-12,共5页
Welding Technology
基金
国防科工委项目(JPPT-115-128)
