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Finite element simulation of explosively-driven plate impact with application to explosive welding

机译:爆炸驱动板冲击的有限元模拟及其在爆炸焊接中的应用

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Explosive welding is an area of study that represents a truly multidisciplinary research as it deals with the dynamics of collision at high velocities and pressures, the transient fluid like behavior of metals at extremely high strain-rates, metallurgical and other physical aspects of colliding metals, modeling of material behavior, sources of high rate energy and the geometrical parameters of colliding system of metals. This paper describes work carried out to numerically analyze a two plate welding process using a finite element engineering package and the verification of the results using data from two plate welding tests. The numerical simulations identify factors such as the level of strain induced in the plates and the direction of the shear stress at the collision zone, in the surface of flyer plates as indicators of bond strength. The phenomenon of jetting is computationally reproduced.
机译:爆炸焊接是一个真正的多学科研究领域,涉及高速和高压下的碰撞动力学,极高应变速率下的金属等瞬态流体行为,碰撞金属的冶金学和其他物理方面,材料行为,高能能量来源以及金属碰撞系统的几何参数的模型。本文介绍了为使用有限元工程软件包对两板焊接过程进行数值分析而进行的工作,以及使用来自两板焊接测试的数据对结果进行验证的工作。数值模拟确定了诸如在板中引起的应变的水平以及在碰撞板中在飞板表面上的剪切应力的方向等因素,作为粘结强度的指标。喷射现象在计算上​​得以再现。

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