不同温度条件下三组元HTPB推进剂细观脱湿行为实验及数值模拟  

Experimental Study and Numerical Simulation of Mesoscale Dewetting Behavior of HTPB Tripropellant under Different Temperature Conditions

作　　者：邹子杰 强洪夫 王哲君 王学仁 李世奇 李易依 ZOU Zi-jie;QIANG Hong-fu;WANG Zhe-jun;WANG Xue-ren;LI Shi-qi;LI Yi-yi(Zhijian Laboratory of Rocket Force University of Engineering,Xi'an 710025,China;Missile Engineering Department of Rocket Force University of Engineering,Xi'an 710025,China;96863 PLA troops,Luoyang 471003,China)

机构地区：[1]火箭军工程大学智剑实验室,陕西西安710025 [2]火箭军工程大学导弹工程学院,陕西西安710025 [3]中国人民解放军96863部队,河南洛阳471003

出　　处：《含能材料》2025年第1期13-23,共11页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(11772352,22205259);陕西省自然科学基金(20190504,2020JQ-486)。

摘　　要：开展了宽温域单轴拉伸条件下HTPB推进剂的原位微CT细观结构表征实验,分析了在-20℃、20℃、50℃3种温度环境中推进剂的细观脱湿损伤行为,并基于HTPB推进剂的细观组分体积占比构建了三维细观代表体积单元模型,分析了模型在不同温度和不同应变率条件下的应力-应变关系和脱湿率-应变关系。结果发现,HTPB推进剂在低温环境下(-20℃)脱湿更为严重,推进剂试件断裂时填料/基体界面脱湿率达到了30%,而孔隙率仅为6%。通过数值模拟发现推进剂在低温及高应变率条件下脱湿更为严重,对推进剂力学性能带来了极大的劣化。经实验和仿真结果对比,本研究所构造的数值模型能够有效预测推进剂的脱湿损伤行为及宏观力学性能。This study conducted in-situ micro-CT characterization experiments on HTPB propellant under wide temperature range and uniaxial tension conditions.The mesoscopic dewetting damage behavior of the propellant with three environmental tempera-tures of-20℃,20℃,and 50℃was analyzed,and a three-dimensional mesoscopic representative volume element model based on the volume proportions of the mesoscopic components of HTPB propellant was constructed.The stress-strain relation-ship and dewetting proportion-strain relationship of the model for different temperatures and strain rates were analyzed.It was found that HTPB propellant had more severe dewetting at low temperatures(-20℃),with the filler/matrix interface dewetting proportion of nearly 30%when the propellant specimen fractured,while the porosity was only 6%.Through numerical simula-tion,it was found that the propellant undergoes more severe dewetting with low temperature and high strain rate,which greatly deteriorates the mechanical properties of the propellant.By comparing experimental and simulation results,the numerical model constructed in this paper can effectively predict the dewetting damage behavior and macroscopic mechanical properties of pro-pellants.

关 键 词：HTPB推进剂 细观结构 力学性能 脱湿损伤 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] V512[航空宇航科学与技术—航空宇航推进理论与工程]