固体火箭技术2026，Vol.49Issue(4)：562-569,8.DOI:10.7673/j.issn.1006-2793.2026.04.009
复合推进剂药柱拔模过程的力学响应实验与仿真研究
Experimental and simulation of mechanical response of composite propellant grain during the mandrel drawing process
马梓煜 1王克俭 1唐秋凡 2李吉祯 2罗锦达 1王笑 1黄翰哲 1王志伟1
作者信息
- 1. 北京化工大学 机电工程学院,北京 100029
- 2. 西安近代化学研究所,西安 710065
- 折叠
摘要
Abstract
In the mandrel drawing process of composite propellant grain forming,interfacial adhesion and friction between the mandrel and the grain are key factors affecting structural integrity of the grain.In order to explore the mechanical response of the grain under different working conditions,the material properties of the grain,as well as the friction coefficient and interfacial adhesion strength between the grain and the mandrel were obtained through experiments,and the finite element simulation model for the mandrel-drawing process was established.In this study,a linear viscoelastic constitutive model and a bilinear cohesive zone model were adopted to characterize the material mechanical behavior and the interfacial debonding process,respectively.By simulating the mandrel-drawing process under different temperatures(30,40,50℃)and mandrel-drawing speeds(1,2,3 mm/s),the evolutionary laws of the mandrel-drawing force and the stress-strain distribution of the propellant grains were systematically analyzed.The results show that the mandrel-drawing process of the propellant grains can be divided into three stages:bonding,debonding,and separation.Stress concentration occurs at the contact end of the grain inner wall,the fillet transition zone,and the dynamic contact point with the mandrel.Both stress and strain gradually accumulate as the mandrel is drawn out.Within the tested parameter range,when the temperature increases from 30 ℃to 50 ℃,the maximum mandrel-drawing force decreases from 117.0 N to 85.8 N,while the maximum stress remains stable at 0.118 MPa,and the maximum strain rises from 0.020 to 0.035.As the mandrel-drawing speed increases from 1 mm/s to 3 mm/s,the maximum mandrel-drawing force increases from 117.0 N to 133.2 N,while the maximum stress still stays at 0.118 MPa,and the maximum strain drops from 0.020 to 0.012.关键词
复合推进剂/装药芯模/拔模/力学响应/黏聚力模型Key words
composite propellant/mandrel for propellant loading/drawing the mandrel/mechanical response/cohesion force models分类
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马梓煜,王克俭,唐秋凡,李吉祯,罗锦达,王笑,黄翰哲,王志伟..复合推进剂药柱拔模过程的力学响应实验与仿真研究[J].固体火箭技术,2026,49(4):562-569,8.
