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An experimental study of the indentation behaviour of Al foam

Xinzhu Wang ; Chongqing University
Xianghe Peng
Zaoyang Guo

Puni tekst: engleski PDF 556 Kb

str. 15-21

preuzimanja: 597



The indentation response of a closed-cell Al foam
under the flat-end cylindrical indenter was
experimentally investigated. The effects of indenter
sizes, relative density of Al foam and boundary
condition on the mechanical and energy absorption
characteristics of indentation were also
investigated. Experimental results show that the
indentation load-displacement response obtained
using the flat-end cylindrical indenter is similar to
that observed under uniaxial compression. Crosssectional
views of the indented specimens show that
the deformation is confined only to the region
directly under the indenter with very little lateral
spread, and that the indentation deformation of Al
foam is non-uniform. The tear energy and energy
absorbing efficiency of Al foam is not related with
the indenter diameter and relative density of Al
foam. By increasing the indenter diameter or
decreasing relative density, the indentation
hardness is linearly decreased, but the energy
absorbing capability linearly increases with an
increase in indenter diameter or an increase in
relative density. At a certain indentation depth
range, the difference between rigid foundation and
the indentation response of Al foam under simply
supported conditions can be ignored.

Ključne riječi

Al foam, indentation, tear energy, energy absorbing

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