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In this paper, the finite element analysis is applied to study the performance of the bondedcomposite reinforcement or repair for reducing stress concentration at a semi-circular lateralnotch and repairing cracks emanating from this kind of notch. The effects of the adhesiveproperties on the variation of the stress intensity factor at the crack tip were highlighted. Theobtained results show that the stress concentration factor at the notch tip is reduced about30% and the maximal reduction of the stress intensity factor is about 80%. The adhesiveproperties must be optimised in order to increase the performance of the patch repair orreinforcement.