超声端点反射法检测PBX表面裂纹深度  

Crack Depth Detection of PBX Section by Ultrasonic Edge Peak Echo Method

作　　者：宗和厚[1] 张伟斌[1] 肖丽[1] 周海强[1] 杨占锋[1] 

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

出　　处：《含能材料》2016年第2期166-170,共5页Chinese Journal of Energetic Materials

基　　金：自然科学基金青年基金(11204279)

摘　　要：炸药件表面裂纹对其力学性能及爆轰性能具有重要影响,能否通过加工余量去除表面裂纹,关键在于裂纹深度的准确定量。本研究基于超声波端点反射基本原理,建立了奥克托今(HMX)基高聚物黏结炸药(PBX)表面裂纹深度定量检测方法。设计制作了不同深度裂纹的模拟试块,校验了超声端点反射法裂纹深度定量精度。发现实验测量重复性好,实测深度与真实深度之间的差值小于1.0 mm。对比了含自然裂纹的炸药件超声检测和微焦点CT成像技术检测结果。其裂纹深度结果一致性好,表明端点反射法测量裂纹深度是可靠的。分析了超声检测误差来源。结果表明,超声端点反射法检测的裂纹深度与其裂纹实际深度较接近,误差在±1.0 mm之内。The surface cracks of explosive parts have important influence on its mechanical properties and detonation properties and can remove the surface cracks by machining margin, and the accuracy of crack depth is the key. Based on the basic principle of ultrasonic wave edge peak echo, a quantitative detection method of surface crack depth for HMX based polymer bonded explosive （PBX） was established. The simulation test blocks with different-depth cracks were designed and manufactured. The quantitative precision of crack depth of ultrasonic edge peak echo method was checked. A better experiment repeatability was found. The different value between measured depth and actual one is less than 1.0 mm. The detection results of crack depth of explosive obtained by ultrasonic testing and micro focus X-μCT imaging technique were compared. The crack height results have good consistency, indicating that the edge peak echo method for measuring crack depth is reliable. The ultrasonic testing error sources are analyzed. Results show that the crack depths detected by the edge peak echo method are close to actual crack depths, with the error within ±1.0 mm.

关 键 词：高聚物黏结炸药(PBX) 表面裂纹 裂纹深度 端点反射法 

分 类 号：TQ560.1[化学工程—炸药化工]