Experimental and numerical investigations on laser-welded corrugated-core sandwich panels subjected to air blast loading |
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| Institution: | 1. School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. High Velocity Impact Dynamics Lab, Harbin Institute of Technology, Harbin 150080, China;3. Naval Academy of Armament, Beijing, 100161, China;1. State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi''an Jiaotong University, Xi''an 710049, China;2. Department of Engineering Physics, Xi''an Research Institute of High-Tech, Xi''an 710025, China |
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| Abstract: | Experimental investigations on the laser-welded triangular corrugated core sandwich panels and equivalent solid plates subjected to air blast loading are presented. The experiments were conducted in an explosion tank considering three levels of blast loading. Results show that the maximum deflection, core web buckling and core compaction increased as the decrease of stand-off distance. Back face deflections of sandwich panels were found to be nearly half that of equivalent solid plates at the stand-off distances of 100 mm and 150 mm. At the closest stand-off distance of 50 mm, the panel was found to fracture and fail catastrophically. Autodyn-based numerical simulations were conducted to investigate the dynamic response of sandwich panels. A good agreement was observed between the numerical calculations and experimental results. The model captured most of the deformation/failure modes of panels. Finally, the effects of face sheet thickness and core web thickness on the dynamic response of sandwich panel were discussed. |
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| Keywords: | Metallic sandwich panel Triangular corrugated core Air blast loading Deformation mode Laser welding |
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