随着金属泡沫在工程应用中的增加,对它们在不同应变速率下的动态行为进行研究是有必要的。采用熔体发泡法制备闭孔粉煤灰泡沫铝,并对其在应变速率从700 s~(-1)增加到1950 s~(-1)时的应力—应变行为进行研究。使用商用有限元软件Abaqus/Explicit对分离式霍普金森压杆(SHPB)的数学模型进行模拟。实验和模拟结果证实了数学模型是可用的。研究了应变速率对抗压强度和能量吸收的影响,得到了多种应变率下的应力—应变曲线。结果表明,闭孔粉煤灰泡沫铝对应变速率是敏感的。 As metal foams increase in engineering applications, it is necessary to study their dynamic behavior at different strain rates. The closed-cell fly ash aluminum foam was prepared by melt blowing method and its stress-strain behavior was investigated when the strain rate increased from 700 s ~ (-1) to 1950 s ~ (-1). A mathematical model of a split Hopkinson pressure bar (SHPB) was simulated using commercial finite element software Abaqus / Explicit. The experimental and simulation results confirm that mathematical models are available. The effect of strain rate on compressive strength and energy absorption was studied. The stress-strain curves at various strain rates were obtained. The results show that closed-cell fly ash aluminum foam is sensitive to strain rate.