Host: The Japan Society of Mechanical Engineers
Name : Mechanical Engineering Congress,Japan
Date : September 11, 2016 - September 14, 2016
It is important to manage the growth of fatigue cracks for a long time. These cracks are growing due to vibration or welding heat, generally. When a crack length runs into the limit, it becomes unstable fracture state. Then, it cannot be managed. In this study, fatigue crack from the stress distribution at the crack tip is to clarify the process until the limit crack length, to perform the development of stress relaxation and the remaining life extension using elasticity. The results of this study, it is possible to release stress concentration by utilizing the piezoelectric actuator and to prolonging a life of steel materials under cyclic loading.
