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发明公开
CN110823695A 基于宏观力学模型的复合固体推进剂填料/基体界面作用老化性能评价方法 有权

基于宏观力学模型的复合固体推进剂填料/基体界面作用老化性能评价方法
摘要：
本发明公开了一种基于宏观力学模型的复合固体推进剂中填料/基体界面作用老化性能评价方法，具体步骤如下：1)获得不同老化时间的固体推进剂应力-应变单轴拉伸曲线(σ(t)-λ(t)曲线)；2)通过应力-应变单轴拉伸曲线获得某一定应变λ下对应的应力值σ(t)；3)通过试样获得不同老化时间的固体推进剂试样的交联密度Ve(t)；4)根据式(1)计算得到不同老化时间t对应的某一定应变λ下的Kλ(t)；5)获得Kλ(t)随老化时间t的变化规律。Kλ(t)值越大，填料与基体的界面作用越强。本发明是基于复合材料宏观力学模型的复合固体推进剂中填料/基体界面老化性能评价方法，是不同于现有技术的新方法。
摘要（英）：

The invention discloses a method for evaluating the interface interaction aging performance of a filler/a matrix in a composite solid propellant based on a macromechanics model. The method comprises the following specific steps of 1) obtaining stress-strain uniaxial stretch curves (sigma (t)-lambda (t) curves) of the solid propellant at different aging time; 2) obtaining a corresponding stress value sigma (t) under a certain strain lambda through the stress-strain uniaxial stretch curves; 3) obtaining the crosslinking density Ve (t) of a solid propellant sample at different aging times throughthe sample; 4) calculating corresponding K lambda (t) under a certain strain lambda at different aging time t according to a formula (1); and 5) obtaining a change rule of the K lambda (t) along withthe aging time t. The larger the value of K lambda (t) is, the stronger the interface interaction of the filler and the matrix is. The method for evaluating the interface interaction aging performance of the filler/the matrix in the composite solid propellant based on the macromechanics model is a new method different from the prior art.

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