Study on Dynamic Compressive Mechanical Behavior of Solid Propellant
The Split Hopkinson Pressure Bar (SHPB) is an ideal tool in carrying out high-speed loading to materials. It can afford many loading means to measure material’s properties under dynamic load. Therefore, this paper was mainly carried out to investigate the dynamic mechanical behavior of a solid propellant by SHPB. And the stress-strain curves at four strain rates, such as 0.001 s-1, 0.01 s-1, 1 280 s-1 and 8 000 s-1 were obtained. Thus, nonlinear viscoelastic ZWT constitutive model was adopted to describe its mechanical properties for the further study and application of the solid propellant. The results showed that the curves manifested that the solid propellant presented viscoinelasticity, strain-hardening and strong strain rate sensitivity of compressive properties both the quasi-static and dynamic compressive tests. The compressive property of the solid propellant presented high strain-rate sensitive. The stress strain curve under dynamic loading was much more linear than the response under quasi-static loading with the increase of strain rate. Based on the experimental data and simulation result, a constitutive relation was employed to describe the mechanical behavior of solid propellant under different strain rates.
solid propellant Split Hopkinson Pressure Bar (SHPB) high strain rate mechanical behavior ZWT constitutive relation
DENG Qiong MIAO Yinggang QI Wei
School of Aeronautics, Northwestern Polytechnical University, Xian 710072, Shaanxi, China
国际会议
2009 International Autumn Seminar on Propellants,Ezplosives and Pyrotechnics(2009国际推进剂、炸药、烟火技术秋季研讨会)
昆明
英文
1-5
2009-09-22（万方平台首次上网日期，不代表论文的发表时间）