Journal
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
Volume 74, Issue -, Pages 67-82Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijimpeng.2014.06.008
Keywords
Metal sandwich beam; Soft core; Impulsive loading; Dynamic plasticity; Large deflection
Categories
Funding
- NSFC [11372235, 11102146, 11321062, 11272246]
- National Basic Research Program of China [2011CB610301]
- Fundamental Research Funds for the Central Universities
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A simplified analytical model is proposed to predict the large deflection response of fully clamped metal sandwich beam with soft core subjected to impulsive loading over a central patch. Using the classical yield condition for sandwich cross-section, the dynamic response is uncoupled into two distinct phases: a bending-only phase and a plastic string phase. Analytical solutions for the metal sandwich beams under impulsive loading are then obtained. Comparisons of the analytical predictions with finite element results manifest that the simplified analytical model can accurately capture the dynamic response of sandwich structure with a soft core. Finally, the analytical formulae are employed for the minimum mass design of sandwich structures. (C) 2014 Elsevier Ltd. All rights reserved.
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