Abstract: An advanced finite element method for analysing the behavior of cracked sheets which are patched with a fibre composite material is described. The numerical procedure is based upon the previous work by R. Jones and other authors. An analysis of stress intensity factor and adhesive shear stress is presnted. The calculations and experimental results of fatigue crack growth show that the method and conclusions in this paper can be used as a theoretical base in design of crack patching by adhesive bonding.

Key words: crack sheet, adhesive, patch, composite