加速度载荷下推进剂力学行为研究进展

Research progress in dynamic mechanical behaviorof solid propellant charge under axiallaunching acceleration load

为探究加速度载荷条件下固体推进剂及装药的力学行为,首先分析了加速度载荷条件下固体推进剂装药力学响应呈材料非线性、几何非线性和边界条件非线性的特点,并从宽泛应变率力学性能试验、线性与非线性粘弹性本构模型、失效准则、结构力学响应、装药检测验证等五方面,对加速度载荷条件下固体推进剂动态力学行为进行了综述。结果表明,完善深化加速度载荷下固体推进剂中应变率力学性能试验及装药检测验证方法,建立考虑温度、应变率、热化学反应的非线性本构模型等是发展抗过载推进剂的关键。在此基础上,梳理了下一步研究的重点,认为加速度载荷下推进剂装药失效机理、多层结构的热化学与力学的耦合仿真、抗过载推进剂装药设计准则等将是下一步的研究重点。

To study dynamic mechanical behavior of solid propellant and charge under axial launching acceleration load.The dynamic behavior of solid propellant charge under axial launching acceleration load presents dynamic mechanical behaviors of material nonlinear,geometrically nonlinear and boundary condition nonlinear based on the working process.From the aspect of mechanical properties testing under a wide range of strain rates,constitutive models,failure criteria,mechanical response analysis and validation tests relating to dynamic mechanical behaviors of solid propellant charge,a summary was conducted.The analysis results show that past researches on dynamic mechanical behavior of solid propellant charge are focused on mechanical properties tests and validation test methods,constitutive models for temperature,strain rate and thermal chemical reaction.On this basis,the future key research directions are also briefly presented,proposing that failure criteria and mechanism,numerical study coupled thermochemics with mechanics of multilayer structure,standard rules of solid propellant charge under acceleration load are the focus of future research.