Evaluation of Fracture Behavior of Adhesive Layer in Fiber Metal Laminates using Cohesive Zone Models

• Journal title : Composites Research
• Volume 29, Issue 2,  2016, pp.45-52
• Publisher : The Korean Society for Composite Materials
• DOI : 10.7234/composres.2016.29.2.045
Title & Authors
Evaluation of Fracture Behavior of Adhesive Layer in Fiber Metal Laminates using Cohesive Zone Models
Lee, Byoung-Eon; Park, Eu-Tteum; Ko, Dae-Cheol; Kang, Beom-Soo; Song, Woo-Jin;

Abstract
An understanding of the failure mechanisms of the adhesive layer is decisive in interpreting the performance of a particular adhesive joint because the delamination is one of the most common failure modes of the laminated composites such as the fiber metal laminates. The interface between different materials, which is the case between the metal and the composite layers in this study, can be loaded through a combination of fracture modes. All loads can be decomposed into peel stresses, perpendicular to the interface, and two in-plane shear stresses, leading to three basic fracture mode I, II and III. To determine the load causing the delamination growth, the energy release rate should be identified in corresponding criterion involving the critical energy release rate ($\small{G_C}$) of the material. The critical energy release rate based on these three modes will be $\small{G_{IC}}$, $\small{G_{IIC}}$ and $\small{G_{IIIC}}$. In this study, to evaluate the fracture behaviors in the fracture mode I and II of the adhesive layer in fiber metal laminates, the double cantilever beam and the end-notched flexure tests were performed using the reference adhesive joints. Furthermore, it is confirmed that the experimental results of the adhesive fracture toughness can be applied by the comparison with the finite element analysis using cohesive zone model.
Keywords
Fiber metal laminates;(Double cantilever beam test;End-notched flexure test;Energy released rate;Cohesive zone model;
Language
Korean
Cited by
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