Damage accumulation model for aluminium-closed cell foams subjected to fully reversed cyclic loading

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Abstract

Although metal foams are a relatively new material, substantial knowledge has been accumulated about their mechanical properties and behaviour under monotonic loads and tension-tension and compression-compression cyclic loads. However, there are very few reports of the behaviour of metal foams under tension-compression-reversed loading. In this paper, we examine some of the rare published data regarding the tension-compression cyclic response of metal foams, develop a statistical model of the fatigue lifetime and propose two damage accumulation models for aluminium-closed cell foams subjected to a fully reversed cyclic loading. In developing these models a fatigue analysis and a failure criterion for the material are needed; the fatigue models considered are the Coffin-Manson and the statistical Weibull model, and the failure criterion used is the one described by Ingraham et al. (Ingraham, M.D., DeMaria, C.J., Issen, K.A. and Morrison, D.J.L. (2009). Mater. Sci. Eng. A. 504:150-156). The models developed are compared with the experimental published data by Ingraham et al. (Ingraham, M.D., DeMaria, C.J., Issen, K.A. and Morrison, D.J.L. (2009). Mater. Sci. Eng. A. 504:150-156) and a final analysis was performed to determine whether it is preferable to use the total or plastic strain amplitude for the fatigue analysis.

Original languageEnglish
Pages (from-to)1021-1034
Number of pages14
JournalFatigue and Fracture of Engineering Materials and Structures
Volume34
Issue number12
DOIs
StatePublished - Dec 2011
Externally publishedYes

Keywords

  • damage accumulation
  • fatigue model
  • metal foams

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