非线性超声技术检测TATB基PBX微损伤  

Detection of Micro-damages in TATB-based Polymer Bonded Explosive by Nonlinear Ultrasonic Technique

作　　者：杨占锋[1,2] 田勇 周海强[1] 张伟斌[1] 李敬明[1] 李卫彬[3] YANG Zhan feng;TIAN Yong;ZHOU Hai qiang;ZHANG Wei bin;LI Jing ming;LI Wei bin(Institute of Chemical Materials, CAEP, Mianyang 621999, China;Department of Graduate Students, CAEP, Beijing 100088, China;Department of Aeronautics, School of Aerospace Engineering, Xiamen University, Xiamen 361005, China)

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621999 [2]中国工程物理研究院北京研究生院,北京100088 [3]中国厦门大学航空航天学院航空系,福建厦门361005

出　　处：《含能材料》2017年第12期970-975,共6页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(11204279);国家自然科学基金委员会-中国工程物理研究院NSAF联合基金重点支持项目(U1330202);中央高校基础研究基金(20720140511)

摘　　要：针对高聚物粘结炸药(PBX)初始损伤及疲劳损伤问题,利用自行建立的非线性超声测试装置,对模压成型的两种密度三氨基三硝基苯(TATB)基PBX圆柱形试样及其在压缩疲劳过程中的非线性超声参量进行了测试,用断貌分析和计算机断层扫描(CT)验证了非线性超声检测结果。结果表明,与内部初始损伤程度较低的TATB基PBX试样相比,内部存在明显界面损伤的TATB基PBX试样的非线性超声系数明显偏高,非线性超声系数与TATB基PBX初始损伤程度之间有一定的相关性;在TATB基PBX试样疲劳加载至即将产生微裂纹时,非线性超声系数急剧增加并在产生宏观裂纹时达到极值,显示非线性超声参量可监测TATB基PBX疲劳损伤发展过程;TATB基PBX初始损伤程度不同其疲劳损伤速度和发展过程也不尽相同。Aiming at the problem of initial damage and fatigue damage for polymer bonded explosive(PBX),the nonlinear ultra-sonic parameters of two kinds of triamino trintrobenzene(TATB)-based PBX cylindrical specimens with different density formed by compression molding and these specimens in the process of compressive fatigue were tested by self-established nonlinear ultrasonic testing device.The nonlinear ultrasonic testing results were verified by fracture surface analysis and computer tomography(CT)testing.Compared with TATB-based PBX specimens with less initial interfacial micro-damage degree,the nonlinear ultrasonic co-efficients of the TATB-based PBX specimens with obvious interfacial damage are obviously higher.There is a certain relevance be-tween the nonlinear ultrasonic coefficient and the initial damage degree of TATB-based PBX.When the microscopic crack is nearly generated in the TATB-based PBX,the nonlinear ultrasonic coefficient increases sharply and reaches maximum,revealing that the nonlinear ultrasonic parameters can monitor the fatigue damage developing process.There is a certain difference in fatigue damage rate and developing process for TATB-based PBX specimens with different initial micro-damage degree.

关 键 词：高聚物粘结炸药(PBX) 微损伤 疲劳 超声检测 非线性参量 

分 类 号：TQ560.72[化学工程—炸药化工]