火炸药学报2024，Vol.47Issue(4)：354-364,11.DOI:10.14077/j.issn.1007-7812.202312011
高频空化冲击作用下HTPB固体推进剂的细观损伤机制
Mesoscale Damage Mechanism of HTPB Solid Propellants by High Frequency Cavitation Impact
摘要
Abstract
In order to study the thermal-mechanical coupling behaviors and mesoscale damage mechanism of HTPB solid propel-lants under high frequency cavitation impact,a three-dimensional full gradaed HTPB solid propellant mesoscale modeling was proposed considering the actual interface between particle and matrix.Different from the traditional meso-mechanical model in which virtual cohesive force interface element is embedded between particle/matrix interface,the thermo-mechanical coupling meso-mechanical model of solid propellant under the impact of cavitation microjet is further established.The breaking mecha-nism,damage mechanism,local stress strain and temperature distribution of solid propellant were analyzed.The results show that the AP particles break directly when the cavitating microjet acts on the AP particles.With the increase of impact degree,the interface layer between AP particles and HTPB matrix is fractured by impact.The maximum stress and strain values of solid propellant after cavitation microjet impact are 34.27MPa and 1.314,respectively.The stress wave transmission path change due to the obstruction of AP particles,Al particles,and interface phases.The maximum temperature value of the cavitation impact solid propellant process shows a gradually increasing trend due to the gradual accumulation of fracture energy,internal energy and friction energy.The maximum temperature value is 24.59 ℃.The solid propellant at a position far away from the cavitation microjet has no obvious temperature rise due to the low heat transfer coefficient.关键词
材料力学/HTPB复合固体推进剂/空化冲击/绿色回收/全级配/细观损伤/界面相/FDP算法Key words
material mechanics/HTPB composite solid propellants/cavitation impact/green recycling/full gradation/me-soscale damage/interface phase/Force-Directed Placement algorithm分类
武器工业引用本文复制引用
赵蒙,刘博,周文君,张有智,慕晓刚,王煊军..高频空化冲击作用下HTPB固体推进剂的细观损伤机制[J].火炸药学报,2024,47(4):354-364,11.基金项目
火箭军工程大学青年基金(No.2021QN-B014) （No.2021QN-B014）
国防科技基础加强计划资助 （）
