铜与低碳钢冲击连接的仿真模拟  

Simulation of impact connection between copper and low carbon steel

作　　者：孙标 廖秋慧[1] 何建萍[1] SUN Biao;LIAO Qiu-hui;HE Jian-ping(College of Materials and Engineering,Shanghai University of Engineering and Science,Shanghai 201600,China)

机构地区：[1]上海工程技术大学材料工程学院,上海201600

出　　处：《材料热处理学报》2021年第10期157-166,共10页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51775327)。

摘　　要：为实现铜与低碳钢的连接,一种新型连接方法被提出,即旋转冲击连接,用铜作为旋转子弹,低碳钢作为基板,子弹以一定的碰撞速度和角度冲击基板实现连接。为了获得冲击连接形成所需的合适冲击速度和角度,利用SPH(Smoothed-particle hydrodynamics)粒子法模拟冲击连接过程。结果表明:子弹冲击连接时可以形成稳定界面波形的冲击速度范围为150~380 m/s,冲击角度范围为0°~6°。同时分析了冲击角度和速度对界面波形成的原因和影响,表明子弹在低速度(150~380 m/s)和低冲击角度(0°~6°)时界面机理符合应力波机理与复板流刻入机理;高速度(480~928 m/s)和高冲击角度(7°~10°)时符合流体力学的机理。In order to realize the connection between copper and low carbon steel,a new connection method was proposed,namely rotary impact connection.Copper was used as the rotary bullet,low carbon steel as the base plate,and the bullet impacts the base plate with a certain impact speed and angle to realize the connection.In order to obtain the appropriate impact velocity and angle for the formation of impact connection,the SPH(smoothed particle hydrodynamics)particle method was used to simulate the impact connection process.The results show that the ranges of impact velocity and impact angle of the interface wave which can be stably formed during bullet impact connection are 150-380 m/s and 0°-6°,respectively.The reasons and effects of impact angle and velocity on the formation of interface wave were analyzed.The results show that the interface mechanism of the bullet at low velocity(150-380 m/s)and low impact angle(0°-6°)is consistent with the stress wave mechanism and clad flow engraving mechanism,and high velocity(480-928 m/s)and high impact angle(7°-10°)conform to the mechanism of hydrodynamics.

关 键 词：冲击连接 数值模拟 SPH粒子法 界面波形 

分 类 号：TG457[金属学及工艺—焊接]