In aerospace and automotive industries in repair of damaged parts as a result of various accidents damaged part is cut and extracted from main part and patch parts are bonded to the outer surfaces.Sometimes doublestrap patches are used and a gap remain between patches as much as thickness of patch.In this study, repairment is made by adding an attachment part extracted particle size to the empty region between the two patches.Effects of patch thichkness, overlap length, adherend thickness and attachment part length on strength are examined.It is observed that, failure load increases with increase in adherend thickness and overlap length and increase in patch thickness and attachment part decreases failure load.
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