基于Hopkinson压杆实验技术的含能材料动态力学性能测试方法研究进展

Progress in Experimental Determination of Dynamic Mechanical Behaviors of Energetic Materials Based on Split Hopkinson Pressure Bar

评述了基于Hopkinson压杆实验技术的高度变率下含能材料动态力学性能测试方法的研究进展。鉴于含能材料的低杨氏模量、密度、波阻,采用Hopkinson压杆测试其力学性能时存在一些问题,如应力平衡、波阻抗匹配等。研究表明,常规的Hopkinson压杆试验装置不能得到准确、可信的试验数据,采用波形整形、压电晶体等方法可以解决应力平衡和波阻抗不匹配等问题。Hopkinson压杆实验技术还能为含能材料在高应变率下本构关系的建立以及损伤模式的分析提供实验结果,并指出了今后含能材料力学性能研究的若干方向。附参考文献44篇。

The progress in experimental determination of mechanical behavior of energetic materials（EMs） at high strain rate based on Split Hopkinson Pressure Bar （SHPB） technique is reviewed.Due to the low Young′s modulus,density and wave resistance of EMs,there are some difficulties,such as stress equilibrium and mismatch of wave resistance when SHPB is employed to measure the mechanical properties of EMs.It has been proved by many researchers that to achieve accurate and reliable experimental results,conventional SHPB is no longer applicable.New techniques such as pulse shaper,piezoelectricity crystals can be added to SHPB experiments to solve the problems of stress equilibrium and mismatch of wave resistance,etc.The SHPB technique can also been used to provide experimental results for establishment of material constitutive equation and research on failure pattern or damage evolution.In the end,several future topics are proposed with 44 references.