Experiments on curved sandwich panels under blast loading |
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Authors: | Jianhu Shen Guoxing Lu Zhihua Wang Longmao Zhao |
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Affiliation: | 1. Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, John Street, Hawthorn, Vic 3122, Australia;2. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;3. Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, 79 West Yingze Street, Taiyuan 030024, China |
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Abstract: | In this paper curved sandwich panels with two aluminium face sheets and an aluminium foam core under air blast loadings were investigated experimentally. Specimens with two values of radius of curvature and different core/face sheet configurations were tested for three blast intensities. All the four edges of the panels were fully clamped. The experiments were carried out by a four-cable ballistic pendulum with corresponding sensors. Impulse acting on the front face of the assembly, deflection history at the centre of back face sheet, and strain history at some characteristic points on the back face were obtained. Then the deformation/failure modes of specimens were classified and analysed systematically. The experimental data show that the initial curvature of a curved sandwich panel may change the deformation/collapse mode with an extended range for bending dominated deformation, which suggests that the performance of the sandwich shell structures may exceed that of both their equivalent solid counterpart and a flat sandwich plate. |
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Keywords: | Sandwich shell Blast loading Deformation/failure modes Metal foam |
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