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首页> 外文期刊>International Journal of Solids and Structures >On the determination of the cohesive zone properties of an adhesive layer from the analysis of the wedge-peel test
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On the determination of the cohesive zone properties of an adhesive layer from the analysis of the wedge-peel test

机译：通过楔形剥离试验的分析确定粘合层的内聚区性能

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An extensive numerical study of the mechanics of the "wedge-peel test" is performed in order to analyze the mode I steady state debonding of A sandwich structure made of two thin plastically deforming metallic plates bonded with an adhesive. The constitutive response of the metallic plates is modeled by J(2) flow theory, and the behavior of the adhesive layer is represented with a cohesive zone model characterized by a maximum separation stress and the fracture energy. A steady-state finite element code accounting for finite rotation has been-developed for the analysis of this problem. Calculations performed with the steady-state formulation are shown to be much faster than simulations involving both crack initiation and propagation within a standard, non-steady-state code. The goal of this study is to relate the measurable parameters of the test to the corresponding fracture process zone characteristics for a representative range of adherent properties and-test conditions. An improved beam bending model for the energy release rate is assessed by comparison with the numerical results. Two procedures are proposed for identifying the cohesive zone parameters from experimental measurements. (C) 2003 Elsevier Science Ltd. All rights reserved. [References: 22]
机译：为了分析“楔形剥离试验”的力学原理，进行了广泛的数值研究，以分析由两个薄的塑性变形的金属薄板通过粘合剂粘结而成的三明治结构的I型稳态脱胶。用J（2）流动理论对金属板的本构响应进行建模，并用具有最大分离应力和断裂能的内聚区模型来表示胶粘层的行为。为了解决这个问题，已经开发出了用于有限旋转的稳态有限元代码。结果表明，使用稳态公式执行的计算比在标准的非稳态代码内进行裂纹萌生和扩展的模拟要快得多。这项研究的目的是将测试的可测量参数与相应的断裂过程区特征联系起来，以表征粘附性能和测试条件。通过与数值结果进行比较，评估了用于能量释放速率的改进的梁弯曲模型。提出了两种用于从实验测量中识别粘性区域参数的程序。 （C）2003 Elsevier ScienceLtd。保留所有权利。 [参考：22]

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