Effect of Young's modulus on fatigue crack growth

Effect of Young's modulus on fatigue crack growth

Článek WoS

The objective here is to study the effect of Young modulus, E, on fatigue crack growth using a numerical approach which assumes that plastic CTOD is the crack driving force. The influence of E was found to be relevant comparatively to other material properties. A linear relation was found between 1/E and the plastic CTOD, and therefore the FCG rate, which is according most of the models proposed in literature. The decrease of rigidity increases the global elastic deformation of the component, and therefore crack tip plastic deformation. The linearity between plastic CTOD and 1/E was kept with crack closure.

The objective here is to study the effect of Young modulus, E, on fatigue crack growth using a numerical approach which assumes that plastic CTOD is the crack driving force. The influence of E was found to be relevant comparatively to other material properties. A linear relation was found between 1/E and the plastic CTOD, and therefore the FCG rate, which is according most of the models proposed in literature. The decrease of rigidity increases the global elastic deformation of the component, and therefore crack tip plastic deformation. The linearity between plastic CTOD and 1/E was kept with crack closure.

Fatigue crack growth rate; Young's modulus; Plastic CTOD; Crack closure

Fatigue crack growth rate; Young's modulus; Plastic CTOD; Crack closure

Borges, MF.; Antunes, FV.; Prates, PA.; Branco, R.; Vojtek, T.

2021

01.03.2020

ELSEVIER SCI LTD

OXFORD

1879-3452

International Journal of Fatigue

132

1

Spojené království Velké Británie a Severního Irska

105375-1

105375-9

9

https://www.sciencedirect.com/science/article/pii/S0142112319304797