An automated multiscale simulation of the failure response of adhesive-bonded structural joints

Abstract eng:
Adhesive bonding is one of the key components for the development of lightweight structures in industries such as the aerospace and automotive. However, predicting the failure response of the adhesive layer, which has small thickness and complex microstructure, could be a challenging task. In this work, we implement a computational cohesive model to quantify the impact of microstructural uncertainties such as pre-existing flaws and adherends surface roughness on the failure response of heterogeneous adhesives. A hierarchical interface- enriched finite element method (HIFEM) is employed to simulate the damage initiation and propagation in the adhesive layer. This mesh- independent method allows for using simple structured meshes to discretize the domain, which considerably facilitates the modeling process. A new virtual prototyping algorithm is also introduced and integrated with the HIFEM to automatically generate realistic models of the adhesive microstructure based on imaging data.

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