Crack propagation test method and apparatus

摘要

PPROBLEM TO BE SOLVED: To provide a specific testing method and device capable of performing testing without any influence of bending moment generated by applying forced displacement to the edge of a specimen having a crack at one side in a crack development testing method and device for making a crack to develop while maintaining a stress intensity factor fixedly. PSOLUTION: In the crack development testing method of a flat specimen 1 where cracks 2 are formed at one side, one end of the specimen 1 is fixed on a top board 6 and the other end is fixed to a crosshead 11 capable of traveling vertically, the crosshead 11 is lowered while guiding both the ends of the crosshead 11 by a post 12, and fixed displacement 4 is given to the specimen 1, thus maintaining a stress intensity factor fixedly and allowing the cracks to develop. PCOPYRIGHT: (C)2010,JPO&INPIT