! On the finite width correction factor in prediction models for fatigue crack growth in built-up bonded structures

摘要

It is widely acknowledged that a finite width correction factor is required for the stress intensity factor in the fatigue prediction of built-up structures. This paper examines how a correction factor can be incorporated in the established model for the fatigue crack analysis of fibre metal laminates. It is revealed that the bonded fibres ahead of the crack tip mitigate the finite width effects, resulting in a smaller correction than that for monolithic metal panels. The bridging mechanism is affected by the finite width condition through the enlarged crack opening. The gained understanding is applicable for other built-up bonded structures.