固体推进剂粘弹泊松比的研究

A Study on the Viscoelastic Poisson's Ratio of Solid Propellants

分析了弹性油松比和粘弹油松比的不同概念和意义．推导出了拉伸松弛模量Ｅ（ｔ），体积松弛模量Ｋ（ｔ）和粘弹泊松比ν（ｔ）的相互积分方程关系式及其求解ν（ｔ）的数值积分算法．以Ｅ（ｔ），Ｋ（ｔ）的实测结果作为算例依据，求得一种改性双基推进剂的粘弹泊松比ν（ｔ）的结果、变化规律及其数学表达式．

in the concept and meaning of elastic and viscoelastic Poisson's ratio are analyzed. The integral equation between the tensile stress relaxation modulus E(t),volume relaxation modulus K(t) and viscoelastic poisson's ratio v(t) are derived. A method of calculation for the numeric integral for solving v(t) are obtained. Based on experimental results of E(t) and K(t), a law for their variation and formula on viscoelastic poisson's ratio, taking a modified double propellant as a real example are given.