Abstract：Cellular metallic materials possessing relatively long stress plateau, can absorb a lot of energy and have significant applications in the design of structural crashworthiness. In this paper, experimental studies and numerical simulations prove that: a) Under intense impact loads, the output stress of the aluminum foam with open cells is larger than the input one, which may severely damage the substance under protection, but the foam is not fully consolidated yet. This provides an opposite proof to our purpose of using cellular material as crash material and must be taken into account. b) With the increase of the thickness of test pieces, the occurrence of stress enhancement is prolonged. c) Under different impact loads, the trends of the stress time history curves of the aluminum foam materials with different cell sizes and relative densities are basically the same and stress enhancement happens in all these materials. This investigation provides a basis for the reliability evaluation of protective devices and the design of new cellular metallic materials.
康 锦 霞1 赵 隆 茂2. 开孔铝泡沫材料应力增强的研究[J]. 振动与冲击, 2015, 34(9): 189-195.
Kang jinxia1,Zhao longmao2. INVESTIGATION ON THE STRESS ENHANCEMENT OF ALUMINUM FOAM WITH OPEN CELLS. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(9): 189-195.
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