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高聚物粘结炸药压缩破坏的细观力学实验研究
引用本文:李明,张珏,李敬明,温茂萍.高聚物粘结炸药压缩破坏的细观力学实验研究[J].含能材料,2005,13(2):79-83.
作者姓名:李明  张珏  李敬明  温茂萍
作者单位:1. 中国工程物理研究院化工材料研究所,四川,绵阳,621900
2. 北京大学力学与工程科学系,北京,100871
基金项目:国家自然科学基金(NSFCNo. 10125211),中物院化材所所长基金(No. 42105080106)
摘    要:研究了一种含TATB的高聚物粘结炸药的细观力学行为。带有预制裂纹的炸药试样在电子显微镜腔室的加载平台上进行压缩破坏原位试验,定量分析了其损伤变形局部化特征。利用数字图像相关技术得到了裂纹尖端附近的变形场和位移矢量场分布,表明预制边裂纹的存在对位移场有强烈的扰动。数字相关运算结果发现试样破坏前在预制裂纹尖端有一个错动引起的漩涡矢量场,而裂纹的最终扩展方向有沿着外载荷的方向发展的趋势。

关 键 词:裂纹尖端  边裂纹  矢量场  高聚物  扰动  场分布  位移场  炸药  TATB  试样
文章编号:1006-9941(2005)02-0079-05
收稿时间:2004/6/25 0:00:00

Experimental Investigation to the Damage Localization of PBX Mechanical Failure at Mesoscale
LI Ming,ZHANG Jue,LI Jing-ming and WEN Mao-ping.Experimental Investigation to the Damage Localization of PBX Mechanical Failure at Mesoscale[J].Chinese Journal of Energetic Materials,2005,13(2):79-83.
Authors:LI Ming  ZHANG Jue  LI Jing-ming and WEN Mao-ping
Affiliation:Institute of Chemical Materials, CAEP, Mianyang 621900, China;Department of Mechanics and Engineering Science, Peking University, Beijing 100871, China;Institute of Chemical Materials, CAEP, Mianyang 621900, China;Institute of Chemical Materials, CAEP, Mianyang 621900, China
Abstract:A compressive experiment of in situ of SEM was employed to study the heterogeneous mechanical failure behaviors of plastic bonded explosive containing TATB at mesoscale. Digital pictures of Specimen subjected to quasistatic compressive load were captured for calculating deformation fields and displacement vector fields by the help of digital image correlation algorithm. The vortex field of vectors around the tip of preset crack is observed and the final failure model of specimen obeys the axial splitting which shows the difference from the traditionally accepted point of shearing failure. The localization of damage is visualized via distribution patterns of deformation field and displacement vector field which are affected strongly by the pre-exit crack.
Keywords:solid mechanics  polymer-bonded explosive  localization of damage  digital image correlation  axial splitting
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