Modelling load transfer in single-lap adhesively bonded and hybrid (bolted / bonded) joints

An aerospace structure is built from the assembly of structural sub-components involving joining technologies such as welding, mechanical fastening or adhesive bonding. The function of joints is to ensure load transfer between the structural sub-components. The integrity of the structure directly depends on strength of these joints. In order to design these critical structural areas, load transfer between structural sub-components must be assessed. The objective of this review paper is to present approaches for the simplified modelling and associated resolution schemes of single-lap adhesively bonded and hybrid (bolted/bonded) joints to predict load transfer. We show that the scope of available closed-form solutions is restricted, such that the use of semi-analytical schemes is suitable. Macro-element modelling is then presented. This technique allows the assessment of load transfer and associated stresses, especially in the adhesive layer regarded as a cohesive zone, while enabling the enrichment of the model, making it more representative of the physical reality.

Automated summary

This article introduces the role and importance of various connection technologies in aerospace structures, and proposes simplified modeling and solution schemes for predicting load transfer.