应变率对泡沫Al-Mg合金压缩性能的影响

在应变率分别为10^-3s^-1,600s^-1和1600s^-1条件下对开孔泡沫Al-Mg合金进行了压缩试验，测量了不同应变率下材料的压缩应力．应变(σ-ε)曲线，研究了应变率的变化对这种Al合金泡沫的压缩性能和吸能性的影响。试验结果表明：这种开孔结构的泡沫Al-Mg合金具有明显的应变率效应，随应变率的提高，其屈服强度和流动应力升高；因此，与静态下相比，动态压缩下的吸能性上升，而对应的应力也随之提高。

The Effect of Strain Rate on the Compressive properties of Foamed Al-Mg Allog

The compressive experiments on the foamed Al-Mg alloy foam were conducted under the strain rate ranging from 10. -3s. -1to 1 600 s. -1.The compressive stress-strain curves of the material were measured at different strain rate.The effects of strain rate on the compressive properties and energy absorption capacity of the foams were investigated.The experimental results indicate that the foamed Al-Mg alloy exhibits a significant strain rate effect in dynamic compression,the yield strength and the flow stress of the material increase with increasing strain rate;as a result,the energy absorption capacity of the foam is enhanced,while the stress created in the foam increases under dynamic compression,in comparison to static compression.