Abstract
In the present study, the author researched on the fatigue crack growth of the 3D surface of the curved steel plate. The new conceptual design of the fatigue crack arrest device provides the user with flexible operating. The proposed device design consists of a handle, body, closed-circuit monitoring system assembly, nozzle, material flow nozzle, material tanks and piston assembly. The component can be repaired by laser; the laser flows to the nozzle central aperture. The curved steel plate channel outlets are around the nozzle aperture, material aligned at working focal point follow the laser beam. Presence and detection of a flaw by proximity sensor enable the repairing process. The temperature sensor enables the material flow once achieved the required set temperature. Piston assembly may follow the material flow process. These all processes are accomplished by a compact design. This novel conceptual design provides high degree of freedom to arrest the fatigue crack with simple mechanism. It demonstrates that the proposed technique alters the fatigue crack behaviour of the 3D surface of the curved steel plate with the proposed method.
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