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The failure testing and repair of composite pipes using different fracture models and different orientation angles under internal pressure was experimentally investigated. Patches with different dimensions were made from composite material for repair. Fracture models on composite pipes were created for three different angles. These are horizontal crack, vertical crack and inclined crack. Adhesive layers created by using DP 410 for repair and failure testing of the composite pipes with different fractures were carried out. Failure loads were obtained from experimental tests. The shear extension coupling of composite pipe and patch was considered because the lay-up angles with + θ and – θ layers were in different radii. Effects of orientation angles and types of fracture models were investigated regarding interaction between the pipe, the adhesive and the patch. The most effective patch width and orientation angles were determined.

Experimental failure testing and repair of internal pressurized composite pipes using different fracture models