Study On Indentation Deformation Mechanical Behavior Of Open-cell Aluminum Foams

In this paper, the indentation deformation mechanical behavior as well as the influence of the parameters on the indentation mechanical property of open-cell aluminum foams with different matrixes was investigated. And the indentation deformation mechanism of the foams was discussed.Firstly, the open-cell aluminum foams with different matrixes were prepared by pressure infiltrating process, The quasi-static indentation experiments of the pure aluminum foams and the Al-Si alloy foams were carried on using three types of indenter with different end geometries, i.e. flat-ended punch (FEP), spherical-ended punch (SEP) and conical-ended punch (CEP), respectively. Study mainly focused on the characteristic of the indentation load-displacement response. The results show that the indentation load-displacement curves of the foams closely depends on the sharp of the indenters.Secondly, the quasi-static indentation experiments of the foams with different matrixes were carried on using the flat-ended punch (FEP). Study mainly focused on the influence of the parameters on the indentation mechanical property. The results show great difference in the influence of the cell size on the indentation mechanical property, for the foams with different matrixes. And the influence of the relative density on the indentation mechanical property can be described by the model of Gibson.Lastly, the indentation deformation mechanism and the energy absorption property were discussed. The results show that the indentation macroscopic deformation modality and the indentation microcosmic deformation mechanism of the foams with different matrixes have great difference.