Abstract
Adhesive bonding is a process of permanent bonding between the components of a structure that uses an adhesive to join the components after curing. Adhesive joints have increasingly been used in many applications. Thus, it is important to assess their behavior when subjected to static or impact loads. In this sense, cohesive zone models (CZM) have been used to predict the strength of adhesive joints and to simulate the growth of damage in structures after the definition of the cohesive laws. This work studies the different CZM conditions used to model an adhesive layer in a single-lap joint (SLJ) subjected to impact loading. The numerical results were validated using experimental data. In this study, four overlap lengths (LO) were considered. The evaluated modelling conditions were the decoupling of loading modes with triangular law, cohesive law shape, damage initiation criteria and damage propagation criterion. This analysis allowed to conclude that CZM is a reliable technique to predict the adhesive joint strength under impact. On the other hand, the numerical analysis made it possible to understand in detail the influence of the modelling conditions used in the cohesive models in the results.
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