Damage prediction of clamped circular plates subjected to contact underwater explosion |
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| Affiliation: | 1. Naval Science & Technological Laboratory, Visakhapatnam 530 027, India;2. Department of Metallurgical Engineering & Materials Science, Indian Institute of Technology, Bombay 400 076, India;1. School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China;3. Hubei Key Laboratory of Naval Architecture and Ocean Engineering Hydrodynamic, Wuhan 430074, China;4. China Ship Scientific Research Center, Wuxi 214082, China;5. Maritime Defense Technologies Innovation Center, Wuxi 214082, China;6. Institute of Advanced Manufacturing Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;1. College of Shipbuilding Engineering, Harbin Engineering University, Harbin, Heilongjiang, China;2. Navy Academy, Beijing, China;1. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240, PR China;2. Institute of Vibration, Shock and Noise, Shanghai Jiao Tong University, Shanghai, 200240, PR China |
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| Abstract: | Contact explosion damage prediction of circular steel plates is of interest to the naval architects and warship designers. During contact explosion, a fraction of the explosive energy goes for plastic deformation and fracture of the plate. Experiments were conducted on air backed circular high strength low alloy (HSLA) steel plates to establish this fraction. There was a large amount of plastic deformation preceding fracture in the contact exploded plates. The deformation contour was found to be spherical showing maximum absorption of energy for the depth of bulge attained. The radius of penetration of the test plate was obtained by applying the terminal strain to fracture and the non-uniform strain distribution in the target plate. A case history is presented where the current predictions are compared with the existing empirical methodology and experimental data. |
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