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Inverse analysis determining interfacial properties between metal film and ceramic substrate with an adhesive layer

Acta Mechanica Sinica 2008年第3期24卷 297-303页

作者： Haifeng Zhao Yueguang Wei State-Key Laboratory of Nonlinear Mechanics (LNM) Institute of Mechanics Chinese Academy of ScienceBeijing 100080 China

In the present study, peel tests and inverse analysis were performed to determine the interracial mechanical parameters for the metal film/ceramic system with an epoxy interface layer between film and ceramic. Al films with a series of thicknesses between 20 and 250 μm and three peel angles of 90°, 135° and 180° were considered. A finite element model with the cohesive zone elements was used to simulate the peeling process. The finite element results were taken as the training data of a neural network in the inverse analysis. The interracial cohesive energy and the separation strength can be determined based on the inverse analysis and peel experimental result

关键词： Thin film Peel test interface toughness Cohesive zonemodel Inverse analysis

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DETERMINATION OF INTERFACIAL MECHANICAL PARAMETERS FOR AN Al/EPOXY/Al_2O_3 SYSTEM BY USING PEEL TEST SIMULATIONS

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Acta Mechanica Solida Sinica 2008年第3期21卷 198-206页

作者： Xuemei You Haifeng Zhao Yueguang Wei State-Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Aeademyof Science Beijing 100190 China

Peel test measurements and simulations of the interfacial mechanical parameters for the Al/Epoxy/Al2O3 system are performed in the present investigation. A series of Al film thicknesses between 20 and 250 microns and three peel angles of 90, 135 and 180 degrees are considered. Two types of epoxy adhesives are adopted to obtain both strong and weak interface adhesions. A finite element model with cohesive zone elements is used to identify the interfacial parameters and simulate the peel test process. By simulating and recording normal stress near the crack tip, the separation strength is obtained, Furthermore, the cohesive energy is identified by comparing the simulated steady-state peel force and the experimental result. It is found from the research that both the cohesive energy and the separation strength can be taken as the intrinsic interfacial parameters which are dependent on the thickness of the adhesive layer and independent of the film thickness and peel angle.

关键词： peel test interface toughness cohesive zone model energy release rate

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