Abstract
In this paper, a 2D numerical model that is more physically realistic was established to simulate the complete process of Ti/Al explosive welding. Basing on the ANSYS/AUTODYN software package, the smoothed particle hydrodynamics (SPH) and arbitrary Lagrangian-Eulerian (ALE) were used for running this simulation. The numerical model can capture the typical physics in the explosive welding process, including the expansion of explosives, flyer plate bending, the impact of metal plates, jetting, and the wavy interface. The variable physical parameters during the explosive welding process were discussed. Most parts of the jet originated from the aluminum plate. According to the model, the jet velocity reached 7402 m/s. The pressure at the detonation point was too small to make the two plates to bond. The pressure could reach an order of magnitude of 107 kPa when the detonation energy tended to be stable and was far more than the yield strength of both materials, which resulted in an obvious narrow region of plastic strain emerging close to the collision zone. The signs of shear stresses between the two plates were the opposite. The interface morphology changed from straight to wave along the propagation of the detonation wave in the simulation, which was consistent with the experimental results.
Highlights
Laminated metal composites have broad development prospects and have been applied in many fields, such as aerospace, equipment manufacturing, and chemical industries [1,2,3]
Driven impact welding belongs to the field of multidisciplinary research, which relates to complex chemical reactions, physical processes, and metallurgical processes [5]
The entire kinematic process of real explosive welding was reproduced by using the current model
Summary
Laminated metal composites have broad development prospects and have been applied in many fields, such as aerospace, equipment manufacturing, and chemical industries [1,2,3]. The SPH method to study and the mechanisms their simulations, the changing physical processes involving shear stress and effective plastic strain and the physical phenomenon of the explosion welding of titanium and its alloys. In their simulations, of changing materials physical were clearly shown. Yuan et al.wavy interface and the phenomenon of jetting were reproduced, but the detailed mechanism ofthe the studied the process of 6061 Al/AZ31B explosive welding using SPH. Ti/Al work is motived the research involving numerical simulation of a Ti/Al bimetal explosive process are reproduced physical parameters, suchtoasreality collision velocity, compositewelding fabricated by explosive welding.and. This paper may provide a new contribution in the field of Ti/Al laminated composite manufacturing
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