In order to achieve shear mode crack propagation that appears on the surface of rolling/sliding contact machine elements along with the plastic flow, a test method was developed. Rolling contact fatigue is the damage of rolling/sliding contact machine elements, and the crack exists along with the plastic flow. For the applied stress around the crack, shear stress is considered to be dominant caused by the rolling/sliding contact. And the authors considered that the plastic flow acts as a guide to Mode II crack propagation and prevents the branching. The depth of the plastic flow layer on the rolling/sliding contact machine element surface is a few hundred of microns. Therefore, in this study, in order to achieve Mode II fatigue crack growth test of such thin area, a test method was developed. After the cyclic loading, the Mode II crack propagation without compression load was succeeded. The authors concluded that crack growth direction was guided by plastic flow.
|Translated title of the contribution||GS0228-156 Mode II fatigue crack growth characteristics of a material with plastic deformation|
|Publication status||Published - 2015|