2018年1月25日
Finite Element Analysis on the Unloading Elastic Modulus of Aluminum Foams by Unit-cell Model
IOP Conference Series: Materials Science and Engineering
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- 巻
- 288
- 号
- 1
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1088/1757-899X/288/1/012069
- 出版者・発行元
- Institute of Physics Publishing
This paper presents finite element analyses (FEA) on the unloading elastic moduli of aluminum foams under uniaxial loading and bending conditions. The unit-cell model of Gibson and Ashby was utilized in the FEA with elasto-perfectly plastic material. Compression, tension, and bending tests simulations were carried out using Abaqus software. The non-linearity effect caused by structural imperfection/buckling of unit-cell was incorporated. From the compressive test simulation, it was confirmed that the results showed good agreement with the referred experimental data. This means that the developed FE model can be regarded as an RVE model of aluminum foams. Then, the deformation characteristic and elastic modulus obtained from all simulations were compared and examined. As the results, the elastic modulus obtained from bending test demonstrated higher value than that of under uniaxial loads. This discrepancy increases gradually as the relative density decreases. The mechanism responsible for generating the discrepancy in stiffness was discussed. Furthermore, this work points out the necessity of measuring both Young's and flexural moduli for designing an engineering structure using foam materials especially when accuracy and precision are demanded.
- リンク情報
- ID情報
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- DOI : 10.1088/1757-899X/288/1/012069
- ISSN : 1757-899X
- ISSN : 1757-8981
- eISSN : 1757-899X
- ORCIDのPut Code : 46418665
- SCOPUS ID : 85041691574