Experimental and numerical investigations on deformation of cylindrical shell panels to underwater explosion

Article type: Research Article

Authors: Ramajeyathilagam, K. | Vendhan, C.P. | Rao, V. Bhujanga

Affiliations: Shock and Vibration Center, Naval Science and Technological Laboratory, Visakhapatnam 530027, India | Ocean Engineering Department, Indian Institute of Technology Madras, Chennai, 600036, India

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Abstract: Experimental and numerical investigations on cylindrical shell panels subjected to underwater explosion loading are presented. Experiments were conducted on panels of size 0.8 × 0.6 × 0.00314 m and shell rise-to-span ratios h/l =0.0, 0.05, 0.1 , using a box model set-up under air backed conditions in a shock tank. Small charges of PEK I explosive were employed. The plastic deformation of the panels was measured for three loading conditions. Finite element analysis was carried out using the CSA/GENSA [DYNA3D] software to predict the plastic deformation for various loading conditions. The analysis included material and geometric non-linearities, with strain rate effects incorporated based on the Cowper-Symonds relation. The numerical results for plastic deformation are compared with those from experiments.

Journal: Shock and Vibration, vol. 5, no. 4, pp. 253-270, 2001