Research of Explosive Welding: Numerical Simulation and Analysis

Abstract:

To improve understanding of explosive welding and relate the effect of the process variables on the physical parameters, the smooth particle hydrodynamics (SPH) method in the LS-DYNA 12.0 finite element program was adopt to simulate the process of two-layer steel explosive welding. Temperature field near the stagnation point was calculated according to the work-heat transfer theory. Finally, the formation mechanism of the interface wave was analyzed under the condition that strain field, temperature field etc. were considered. The results show that: the phenomenon of jetting and the interfacial waves observed in explosive welding were quite well reproduced in these simulations; the changing collision angle with propagation distance is directly responsible for the change in interface morphology from wavy to smooth at the welding front; the maximum stress ,strain and temperature are localised at the wavy interface zone; the maximum temperatures near the interface will be high enough under proper conditions and this will be helpful for the formation of the jet and the wavy interface.

• Periodical: Advanced Materials Research (Volume 668)
• Pages: 560-564
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.668.560
• Online since: March 2013
• Authors: Xiao Xu Wang, Jin Xiang Wang, Yong He
• Keywords: Explosive Welding, Plastic Flow, SPH Method, Wavy Interface

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