Measurement and analysis of the fracture properties of adhesive joints
2002; Elsevier BV; Linguagem: Inglês
10.1016/b978-0-444-51140-9.50034-2
AutoresM.D. Thouless, Qing‐Xiong Yang,
Tópico(s)Numerical methods in engineering
ResumoThis chapter provides an in-depth discussion on the fracture of adhesive joints with a focus on the way to deduce the “intrinsic” fracture parameters of the adhesive layer from experimental results. It outlines the approach of using these parameters in cohesive-zone models to predict the fracture of adhesive joints. By using this approach, many important issues that are frequently encountered in the fracture testing of adhesive joints, yet are usually ignored by traditional fracture analyses, have been fully addressed and the results are presented in the chapter. These issues include shear loading of the adherends, the influence of adhesive compliance (large deformation in adhesive layers before failure), and the effects of gross plasticity in the adherends. While non-linear deformations can occur in a process zone around a stationary crack, the energy losses are only realized when the crack begins to propagate and the material in the process zone begins to unload. As a crack propagates, the extent of unloading increases and more of the energy dissipated in the process zone is realized as an increase in toughness.
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