Three-dimensional modelling of multi-bolt composite joints

This paper focuses on the development of single lap, multi-bolt composite joints with clearance, with particular emphasis on load distribution within the joint. The models were developed in the non-linear finite element code MSC/MARC. Two models are presented: one is the control case with all three holes having a ‘neat’ fit clearance between the bolt and hole, while the other has a neat fit in two holes with the third hole having a large clearance. Results indicate that clearance has a significant effect on the load distribution in multi-bolt single lap joints.