Investigation of hydroxyl-terminated polybutadiene propellant breaking characteristics and mechanism impacted by submerged cavitation water jet

作     者：Wenjun Zhou Meng Zhao Bo Liu Youzhi Ma Youzhi Zhang Xuanjun Wang Wenjun Zhou;Meng Zhao;Bo Liu;Youzhi Ma;Youzhi Zhang;Xuanjun Wang

作者机构：Zhijian LaboratoryRocket Force University of EngineeringXi’an710025China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2024年第33卷第3期

页      面：559-572页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Program for National Defense Science and Technology Foundation Strengthening the Youth Foundation of Rocket Force University of Engineering(Grant No.2021QN-B014) 

主　　题：Submerged cavitation water jet Hydroxyl-terminated polybutadiene propellant Breaking characteristics Failure modes 

摘      要：A submerged cavitation water jet(SCWJ)is an effective method to recycle solid propellant from obsolete solid engines by the breaking *** propellant s breaking modes and mechanical process under SCWJ impact are *** study aims to understand those impact breaking *** hydroxyl-terminated polybutadiene(HTPB)propellant was chosen as the research material,and a self-designed test system was used to conduct impact tests at four different working *** high-speed camera characterized crack propagation,and the DIC method calculated strain change during the impact ***,micro and macro fracture morphologies were characterized by scanning electron microscope(SEM)and computed tomography(CT)*** results reveal that the compressive strain concentration region locates right below the nozzle,and the shear strain region distributes symmetrically with the jet axis,which increases to 4% at first 16th ms,the compressive strain rises to 2% and 6% in the axial and transverse direction,*** two tensile cracks formed first at the compression strain concentrate region,and there generate many shear cracks around the tensile cracks,and those shear cracks that develop and aggregate cause the cracks to become wider and cut through the tensile cracks,forming the tensile-shear cracks and the impact parts eventually *** HTPB propellant forms a breaking hole shaped conical after impact 10 *** mass loss increases by 17 times at maximum,with the working pressure increasing by three ***,the damage value of the breaking hole remaining on the surface increases by 7.8 times while 2.9 times in the depth of the breaking *** breaking efficiency is closely affected by working *** failure modes of HTPB impacted by SCWJ are classified as tensile crack-dominated and tensile-shear crack-dominated damage mechanisms.