A new cohesive element for structural bonding modelling under dynamic loading

David Morin (1, 2) , Benjamin Bourel (1) , Bruno Bennani (1) , Franck Lauro (1) , Denis Lesueur (1)

1 LAMIH - Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201
2 SIMLab - Structural Impact Laboratory

The purpose of this paper is to propose a simplified macroscopic three-dimensional cohesive element dedicated to crash engineering. At the boundary between the CCZM (Continuous Cohesive Zone Method) and the DCZM (Discrete Cohesive Zone Method) approaches, this cohesive element includes an improved constitutive model in order to take into account the viscoplaticity of the adhesive, its different behaviour in tension and compression but also its damage and failure. After presenting the model used, we will detail how to implement the new macroscopic element in the explicit time loop calculation. An example will illustrate and justify the development of such a cohesive element under dynamic loading.

Mots clés: Structural bonding; Cohesive element; Explicit scheme; Crashworthiness

Domaines: Mécanique [physics.med-ph]

David Morin, Benjamin Bourel, Bruno Bennani, Franck Lauro, Denis Lesueur. A new cohesive element for structural bonding modelling under dynamic loading. International Journal of Impact Engineering, 2013, 53, pp.94-105. ⟨10.1016/j.ijimpeng.2012.02.003⟩. ⟨hal-03470519⟩