PBX模拟材料内应力激光超声掠面纵波检测方法研究  

Study on Detection Method of Internal Stress in PBX Simulated Material by Laser Ultrasonic Skimming Surface Longitudinal Wave

作　　者：周海强[1] 裴翠祥[2] 刘文文 弋东驰 杨占锋[1] ZHOU Hai-qiang;PEI Cui-xiang;LIU Wen-wen;YI Dong-chi;YANG Zhan-feng(Institute of Chemical Materials,CAEP,Mianyang 621999,China;State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi′an Jiaotong University,Beijing Institute of Technology,Xi′an 710049,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]西安交通大学航天航空学院,机械结构强度与振动国家重点实验室,陕西西安710049

出　　处：《含能材料》2018年第9期786-790,816,共6页Chinese Journal of Energetic Materials

基　　金：中物院化工材料研究所科技创新基金(KJCX-201506),国家自然科学基金资助(11502192)。

摘　　要：为了验证激光超声技术检测高聚物粘结炸药(PBX)内应力的可行性,建立了基于激光超声掠面纵波的PBX模拟材料内部应力状态新型高效无损检测方法。搭建了PBX模拟材料试件应力在线激光超声无损检测实验平台。测量了不同加载状态下激光超声掠面纵波信号。结果表明,PBX模拟试件在受到1 MPa以上应力时,超声掠面纵波的传播方向与应力方向平行时声速变化明显。声速相对变化量与应力呈近似线性增加的关系,随着应力的增加,超声掠面纵波的声速随之增加。初步验证了激光超声掠面纵波对于PBX模拟材料内部应力状态检测的可行性。To verify the feasibility of detecting the internal stress of polymer bonded explosive(PBX)by laser ultrasonic technology,a new and high efficiency nondestructive testing method for internal stress state of PBX simulation material based on laser ultrasonic skimming surface longitudinal wave was established.An experimental platform of on-line laser ultrasonic nondestructive testing used for PBX simulation specimen stress was built.The longitudinal wave signal of laser ultrasonic skimming surface was measured under different loading conditions.Results show that when the PBX simulation specimen is subjected to stresses above 1MPa,the velocity of sound changes obviously when the propagation direction of ultrasonic skimming surface longitudinal wave is parallel to the stress direction.The relation between the relative change quantity of sound velocity and the stress increases approximately linearly.With the increase of stress,the sound velocity of ultrasonic skimming surface longitudinal wave increases.The feasibility of detecting the internal stress state of PBX simulation material by laser ultrasonic skimming surface longitudinal wave is preliminarily verified.

关 键 词：高聚物粘结炸药(PBX) 内应力 无损检测 激光超声 表面波 声弹性 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]