Mechanical properties and energy absorption characteristic of magnesium foam under static and dynamic compression

Mechanical properties and energy absorption characteristic of the magnesium foam under static and dynamic compression were studied by an experiment. The micro-deformation features under quasi-static compression condition and the stress-strain curves under the different strain rates were obtained. The influence laws of relative density, cell size and strain rate on mechanical properties such as stress-strain model, yield strength, flow stress and energy absorption per unit volume W were discussed by the characterized energy absorption characteristic with energy absorption per unit volume of W. The investigated results show that the cell size has obvious effects on the mechanical properties and energy absorption characteristic of the magnesium foam, in which a moderate cell size range exists; yield strength and energy absorption per unit volume of W increase with the increase of relative density of the magnesium foam. The investigated results can provide theoretical basis and reference for investigating dynamic destroy of the multi-hole material and its engineering design.