Compressive behavior and deformation mechanism of aluminum foam under different temperature

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (5) : 16-19.

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Compressive behavior and deformation mechanism of aluminum foam under different temperature

WANG Peng-fei, XU Song-lin, HU Shi-sheng

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Abstract

Using the Hopkinson bar and MTS devices to study the dynamic and quasi-static compression behavior in different temperature conditions. The compressive stress strain curve of the Aluminum foam was found to be strongly temperature dependent. It is obvious that the curve under high temperatures was close to that under low temperatures and exhibited a consistent relationship of time-temperature equivalent. At low temperatures the matrix material reveals more brittle characteristic and causes the cell structures to collapse abruptly, and results in a notable “stress drop” and remarkable vibration. But when raising the ambient temperature, the material tends to exhibit ductile property, and deformation of cell structure is mainly through plasticity buckling instead of abrupt collapse.

Key words

metal foam / temperature / strain rate / Hopkinson bar / buckling / stress drop / time-temperature equivalence

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WANG Peng-fei;XU Song-lin;HU Shi-sheng. Compressive behavior and deformation mechanism of aluminum foam under different temperature [J]. Journal of Vibration and Shock, 2013, 32(5): 16-19