Abstract: A three-phase viscoelastic constitutive model is proposed and verified for prediction of the mechanical properties of NEPE high energetic propellants.The relationships between mechanical properties of NEPE propellants and the formulation,particle size,gradation,modulus and tensile strength of matrix,etc.are constructed mathematically.The results show that the predictions of this model is in good agreement with experimental measurements for both tensile strength and elongation of NEPE high energetic propellants.

Key words: NEPE propellants;Mechanical property;Modeling

摘要： 将颗粒填充聚合物三相结构(颗粒相-中间相-基体相)和粘弹模型相结合,提出了NEPE高能固体推进剂三相结构粘弹模型,建立了NEPE高能推进剂力学性能与其配方组成、固体填料粒径及级配、弹性母体(基体)的拉伸强度和模量、界面层模量等参数的数学关系,进行了编程计算,其拉伸强度和伸长率90%的计算值和测试结果相对误差小于20%。

关键词: NEPE推进剂;力学性能;模拟