Two-material optimization of plate armour for blast mitigation using hybrid cellular automata |
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| Authors: | J Goetz H Tan J Renaud A Tovar |
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| Affiliation: | 1. Department of Aerospace and Mechanical Engineering , University of Notre Dame , Notre Dame , IN , 46556 , USA jgoetz@nd.edu;3. Department of Aerospace and Mechanical Engineering , University of Notre Dame , Notre Dame , IN , 46556 , USA;4. Department of Mechanical Engineering , Indiana University-Purdue University Indianapolis , Indianapolis , IN , 46202 , USA |
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| Abstract: | With the increased use of improvised explosive devices in regions at war, the threat to military and civilian life has risen. Cabin penetration and gross acceleration are the primary threats in an explosive event. Cabin penetration crushes occupants, damaging the lower body. Acceleration causes death at high magnitudes. This investigation develops a process of designing armour that simultaneously mitigates cabin penetration and acceleration. The hybrid cellular automaton (HCA) method of topology optimization has proven efficient and robust in problems involving large, plastic deformations such as crash impact. Here HCA is extended to the design of armour under blast loading. The ability to distribute two metallic phases, as opposed to one material and void, is also added. The blast wave energy transforms on impact into internal energy (IE) inside the solid medium. Maximum attenuation occurs with maximized IE. The resulting structures show HCA's potential for designing blast mitigating armour structures. |
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