为研究固体火箭发动机推进剂/衬层粘接界面层的作用特点,以推进剂/衬层粘接试件为例,采用二维粘弹性有限元方法,探讨不同中间相厚度、模量、泊松比时粘接系统的结构响应。结果表明:中间相模量越大,推进剂的应力集中现象越显著;随着中间相厚度的增加,推进剂的应力集中程度明显减弱;中间相的泊松比对粘接系统的应力影响较小。研究结果为界面设计提供依据。

The adhesive system of propellant-liner with interphase is taken as a research object to investigate the influence of interphase. The structure response in various thicknesses, elastic modulus and Poisson's ratio of the interphase was calculated by two-dimensional viscoelastic finite element method. The results show that the stress concentration of the propellant weakens distinctly when the thickness increases. The bigger the elastic modulus is, the more serious the stress concentration of the propellant is. The Poisson's ratio has little effect on the stress of the system. The numerical simulation results supply references to interface design.