Evaluation of mixed-mode crack growth criteria under rolling contact conditions
Paper i proceeding, 2018

Fatigue crack growth direction criteria are evaluated towards a twin-disc experiment from the literature. The experiment is modelled numerically at different crack lengths. Based on numerically evaluated stresses, strains and displacements, a range of crack growth direction criteria from the literature are evaluated and compared to the experimentally found crack growth direction. In the considered experiment, the growth is essentially shear driven. Of the evaluated criteria employed to a linear elastic analysis, the Maximum Shear Stress (MSS) and Vector Crack-Tip Displacement (VCTD) criteria are found to be able to capture the experimentally found crack growth direction throughout the fatigue life.

Elastic-plastic fracture mechanics

Linear elastic fracture mechanics

Shear-mode crack growth.

FE-simulation

Rolling contact fatigue

Twin-disc specimen

Författare

Dimosthenis Floros

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Anders Ekberg

Chalmers, Mekanik och maritima vetenskaper, Dynamik

Fredrik Larsson

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018

253-260

11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, CM 2018
Delft, Netherlands,

Ämneskategorier

Teknisk mekanik

Infrastrukturteknik

Annan materialteknik

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Senast uppdaterat

2019-01-24