Deformation and failure of polymer bonded explosives under diametric compression test
Deformation and failure of polymer bonded explosives under diametric compression test
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DOI：
10.1016/j.polymertesting.2005.12.006
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发表时间：
2006-05-01
期刊：
影响因子：
5.1
通讯作者：
Ding, YS
中科院分区：
文献类型：
--
作者：
Chen, PW;Xie, HM;Ding, YS
研究了颗粒复合材料高聚物粘结炸药（PBX）的拉伸变形与破坏。选择具有不同粘合剂的两种基于HMX的PBX进行研究。直径压缩试验，其中一个圆盘形的样本被径向加载，被选择来产生拉伸破坏的材料。采用常规位移传感器沿水平直径沿着方向测量侧向应变，研究了其准静态拉伸性能和拉伸蠕变性能。采用高分辨率云纹干涉技术，对蠕变过程进行了全场测量。利用扫描电子显微镜对PBX的变形和破坏过程进行了真实的实时微观观察。采用流形元法（MM）模拟了PBX试样在径向压缩条件下的变形和破坏过程，包括裂纹萌生、扩展和最终解理断裂。分析了PBX在径向压缩条件下的变形和破坏机理。本研究所发展的径向压缩实验及技术已被证明适用于PBX拉伸性能的研究。(C)2006爱思唯尔有限公司保留所有权利。
The tensile deformation and failure of polymer bonded explosives (PBXs), a particulate composite, is studied in this paper. Two HMX-based PBXs with different binder were selected for study. A diametric compression test, in which a disc-shaped specimen is loaded diametrically, was chosen to generate tensile failure in the materials. The quasi-static tensile properties and the tensile creep properties were studied by using conventional displacement transducers to measure the lateral strain along the horizontal diameter. The whole-field in-plane creep deformation was measured by using the technique of high resolution moire interferometry. Real time microscopic examination was conducted to monitor the process of deformation and failure of PBXs by using a scanning electron microscope equipped with a loading stage. A manifold method (MM) was used to simulate the deformation and failure of PBX samples under the diametric compression test, including the crack initiation, crack propagation and final cleavage fracture. The mechanisms of deformation and failure of PBXs under diametric compression were analyzed. The diametric compression test and the techniques developed in this research have proven to be applicable to the study of tensile properties of PBXs. (C) 2006 Elsevier Ltd. All rights reserved.