The cohesive law for the particle/matrix interfaces in high explosives
The cohesive law for the particle/matrix interfaces in high explosives
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DOI：
10.1016/j.jmps.2005.01.009
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发表时间：
2005-08-01
影响因子：
5.3
通讯作者：
Geubelle, PH
中科院分区：
文献类型：
--
作者：
Tan, H;Liu, C;Geubelle, PH
颗粒/基体界面的脱粘对复合材料的宏观行为有重要影响。基于内聚区模型的复合材料界面脱粘有大量的分析和数值研究，该模型假设了颗粒/基体界面上的法向（和剪切）牵引力与打开（和滑动）位移之间的唯象关系。然而，有很少或没有实验来确定复合材料中颗粒/基体界面的内聚规律。本文提出了一种测定PBX 9501炸药中颗粒/基体界面结合力的方法。在PBX 9501炸药的改进紧凑拉伸实验中，利用数字图像相关技术获得了宏观裂纹尖端的应力和位移。我们使用扩展的Mori-Tanaka方法（该方法考虑了界面脱粘的影响）和结合能在宏观和微观尺度上的等效性，将宏观尺度的紧凑拉伸实验与颗粒/基体界面的微观结合定律联系起来。这种方法使我们能够定量地确定微观内聚定律中的关键参数，即线性模量，内聚强度，和软化模量的颗粒/基质界面的高爆炸性PBX 9501。本研究表明，Ferrante et al.的[1982年金属粘附中的普遍结合能关系。收入：J.M. Georges（Ed.），粘附和润滑的微观方面，爱思唯尔，阿姆斯特丹，pp. 19-30.]主要针对双金属界面建立的内聚定律不适用于高爆PBX 9501。(c)2005爱思唯尔有限公司保留所有权利。
The debonding of particle/matrix interfaces has an important effect on the macroscopic behavior of composite materials. There are extensive analytical and numerical studies on interface debonding in composite materials based on cohesive zone models which assume a phenomenological relation between the normal (and shear) traction(s) and opening (and sliding) displacement(s) across the particle/matrix interface. However, there are little or no experiments to determine the cohesive law for particle/matrix interfaces in composite materials. In this paper, we develop a method to determine the cohesive law for particle/matrix interfaces in the high explosive PBX 9501. We use the digital image correlation technique to obtain the stress and displacement around a macroscopic crack tip in the modified compact tension experiment of PBX 9501. We use the extended Mori-Tanaka method (which accounts for the effect of interface debonding) and the equivalence of cohesive energy on the macroscale and microscale to link the macroscale compact tension experiment to the microscale cohesive law for particle/matrix interfaces. Such an approach enables us to quantitatively determine key parameters in the microscale cohesive law, namely the linear modulus, cohesive strength, and softening modulus of particle/matrix interfaces in the high explosive PBX 9501. The present study shows that Ferrante et al.'s [1982 Universal binding energy relations in metallic adhesion. In: J.M. Georges (Ed.), Microscopic Aspects of Adhesion and Lubrication, Elsevier, Amsterdam, pp. 19-30.] cohesive law, which is established primarily for bimetallic interfaces, is not suitable to the high explosive PBX 9501. (c) 2005 Elsevier Ltd. All rights reserved.