Indentation of aluminium foam at low velocity

Xiaopeng Shi, Yinggang Miao, Shuangyan Liu, Yulong Li, Guoxing Lu

科研成果: 书/报告/会议事项章节会议稿件同行评审

2 引用 (Scopus)

摘要

The indentation behaviour of aluminium foams at low velocity (10 m/s ∼ 30 m/s) was investigated both in experiments and numerical simulation in this paper. A flat-ended indenter was used and the force-displacement history was recorded. The Split Hopkinson Pressure bar was used to obtain the indentation velocity and forces in the dynamic experiments. Because of the low strength of the aluminium foam, PMMA bar was used, and the experimental data were corrected using Bacon's method. The energy absorption characteristics varying with impact velocity were then obtained. It was found that the energy absorption ability of aluminium foam gradually increases in the quasi-static regime and shows a significant increase at ∼10 m/s velocity. Numerical simulation was also conducted to investigate this process. A 3D Voronoi model was used and models with different relative densities were investigated as well as those with different failure strain. The indentation energy increases with both the relative density and failure strain. The analysis of the FE model implies that the significant change in energy absorption ability of aluminium foam in indentation at ∼10 m/s velocity may be caused by plastic wave effect.

源语言英语
主期刊名DYMAT 2015 - 11th International Conference on the Mechanical and Physical Behaviour of Materials Under Dynamic Loading
编辑Ezio Cadoni
出版商EDP Sciences
ISBN(电子版)9782759818174
DOI
出版状态已出版 - 7 9月 2015
活动11th International Conference on the Mechanical and Physical Behaviour of Materials Under Dynamic Loading, DYMAT 2015 - Lugano, 瑞士
期限: 7 9月 201511 9月 2015

出版系列

姓名EPJ Web of Conferences
94
ISSN(印刷版)2101-6275
ISSN(电子版)2100-014X

会议

会议11th International Conference on the Mechanical and Physical Behaviour of Materials Under Dynamic Loading, DYMAT 2015
国家/地区瑞士
Lugano
时期7/09/1511/09/15

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