Investigation of Oblique Blast Loading on Trapezoidal Corrugated Core Sandwich Panels; Experimental and Numerical Study

Subject Areas : Applied Mechanics

H Mohammadi Hooyeh ¹ (Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Eyvanekey, Garmsar, Iran)
A Naddaf Oskouei ² (Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Eyvanekey, Garmsar, Iran)
Tohid Mirzababaie Mostofi ³ ()
Kh Vahedi ⁴ (Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Eyvanekey, Garmsar, Iran)

Received: 2022-11-08 Accepted : 2023-01-07 Published : 2023-03-01

Keywords: Sandwich panels, Oblique blast loading, Coupled Eulerian Lagrangian method, Trapezoidal corrugated core,

Abstract :

In this work dynamic response of trapezoidal corrugated core sandwich panels subjected to oblique blast loading are studied both numerically and experimentally. The stand-off distance which has been determined from sandwich panel to center of the nearest face of the explosive cylinder is considered 300 mm. the experiments was performed at Four blast tube with different included angles of 0°, 15°, 30° and 45° respect to sandwich target plate. The results of numerical simulation, obtained using coupled Eulerian – Lagrangian (CEL) method at ABAQUS/Explicit software. Maximum mid- point deflection of back and front faces are compared with experiment results. The results show that with increasing angle of tilt of explosive the amount of back face deflection at angles of tilt 15°, 30° and 45° respect to the case of 0°, 4.68%, 5.86% and 9.77% decreases respectively. It is found that at the z direction, deformation profile is completely dome-shaped while the profile in the x direction is almost conical. The achieved results can be used to optimization designing of military vehicles and employed for civil infrastructure.

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