Deformation mechanism of closed-cell aluminum foam under uniaxial compression

被引：0

作者：

Zhu Y. ^{[1
]}

Sun Y. ^{[1
]}

机构：

[1] Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2017年 / 34卷 / 08期

关键词：

Closed-cell aluminum foam; Compressive response; Deformation mechanisms; Finite element modelling; X-ray computed tomography;

D O I：

10.13801/j.cnki.fhclxb.20161116.002

中图分类号：

学科分类号：

摘要：

A three-dimensional (3-D) finite element model of the actual structure of closed-cell aluminum foam was reconstructed based on X-ray computed tomography. The mechanical response and deformation mechanism of aluminum foam under quasi-static uniaxial compression were investigated through numerical simulations and experiments, especially the deformation mode of the foam in plateau stage and densification stage. The results show that at the beginning of plateau stage, the deformation band occurs and the dominant deformation mode of cell edges and cell walls is plastic bending. During plateau stage, the deformation mode switches to plastic wrinkling and buckling. As densification stage starts, the cells within deformation band are seriously collapsed, and are 'biconcave disks'. The numerical simulations are consistent with experimental measurements. Thus, the model is validated, providing a basis for further investigation on the influence of corresponding physical factors (e.g. relative density and loading speed, et al) and deformation mechanism on the energy absorption capability of closed-cell aluminum foam. © 2017, Chinese Society for Composite Materials. All right reserved.

引用

页码：1810 / 1816

页数：6

共 29 条

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