中低应变率下闭孔泡沫铝动态力学性能研究

To explore dynamic mechanical properties and energy absorption characteristics of closed cell aluminum foam, based on universal material testing machines and high speed hydraulic servo material testing machines, dynamic mechanical properties of closed cell aluminum foam under quasi-static state and medium strain rate (0.001-100 s^-1) were tested at room temperature to analyze features of stress-strain curves and energy absorption characteristics of closed cell aluminum foam under different strain rates, different relative densities and different foam aluminum matrix properties. The results showed that pure aluminum matrix aluminum foam under medium and low strain rates has no strain rate effect; aluminum foam with high brittleness and smaller relative density has better energy absorption characteristics; plastic and brittle matrix aluminum foam deformation bands reveal "V" and "X" shapes, respectively; brittle matrix aluminum foam also has no strain rate effect.