Effect of pore density on the compressive response of open-cell Al foams

Abstract

The effects of pore density and matrix on the quasi-static and dynamic compressive behaviours of the high porosity open-cell aluminium foams were examined. The results show that pore density has little effect on the collapse strength of the samples under quasi-static conditions. However, as the strain rate increases, the collapse strength decreases with increasing pore density. The different matrix material also shows distinct strain rate response characteristics, which is related to their respective microstructures. The strain-rate sensitivity is mainly attributed to the micro-inertia effect caused by the larger aspect ratio of the cell edges, which was verified by the more transverse elongation of the dynamic compression samples. Moreover, the energy absorption capacity is also discussed in the present paper.

KEYWORDS:

• High porosity open-cell aluminium foam
• compression behaviour
• strain rate sensitivity
• energy absorption

Acknowledgements

This work is jointly supported by the National Natural Science Foundation of China (Grant Nos 12062025, 51701206 and 12064044), Ph.D. Research Launch Project of Yan'an University (No.YDBK2018-20) and Natural Science Foundation of Shaanxi Province (No. 2019JQ-833).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by National Natural Science Foundation of China: [Grant Number 12062025]; National Natural Science Foundation of China: [Grant Number 51701206]; National Natural Science Foundation of China: [Grant Number 12064044]; Natural Science Foundation of Shaanxi Province [Grant Number 2019JQ-833]; Ph.D. Research Launch Project of Yan'an University: [Grant Number YDBK2018-20].