Proposal of a cohesive zone model suitable for the study of bonded joints.

A. Moradi (1) , C. Huchette (1) , Thomas Vandellos (1) , Dominique Leguillon (2)

1 ONERA - The French Aerospace Lab [Châtillon]
2 DALEMBERT - Institut Jean le Rond d'Alembert

The adhesive thickness has a strong influence on the crack initiation in a bonded assembly. Indeed, the thiner the adhesive thickness, the higher the strength. In order to describe this influence, several cohesive zone models (bilinear, tri-linear and trapezoidal) are used, using a linear elastic stiffness defined as the ratio between the Young's modulus (or the Shear modulus) and the adhesive thickness. The influence of (i) the mesh size, (ii) the shape of the cohesive zone model and (iii) the interfacial stiffness on the crack initiation is studied. The results are discussed in order to conclude about the capabilities of cohesive zone models to predict the crack initiation in a bonded assembly.

Keywords: FREE EDGE EFFECTS; ADHESIVE THICKNESS INFLUENCE; BONDED JOINTS; INITIATION; COUPLED CRITERION; COHESIVE ZONE MODEL

Domains: Engineering Sciences [physics]; Materials

A. Moradi, C. Huchette, Thomas Vandellos, Dominique Leguillon. Proposal of a cohesive zone model suitable for the study of bonded joints.. 19th International Conference on Composite Materials, Jul 2013, MONTREAL, Canada. ⟨hal-01060193⟩