As is well-known, the loading non-proportionality has a significant influence on fatigue process, since the rotation of principal stress/strain axes can lead to additional cyclic hardening. In order to accurately reflect the effect of additional cyclic hardening on the predicted lifetime, Vantadori has recently formulated a strain-based fatigue criterion which implements a novel strain factor (function of material constants and degree of non-proportionality) in the damage parameter relationship. By considering some experimental data available in the literature, the goal of the present paper is to discuss the accuracy of the present criterion in estimating fatigue lifetime of metallic components, especially under non-proportional loading.
A Novel Damage Parameter for Fatigue Life Assessment under Non-Proportional Loading
Ronchei C.
;
2021-01-01
Abstract
As is well-known, the loading non-proportionality has a significant influence on fatigue process, since the rotation of principal stress/strain axes can lead to additional cyclic hardening. In order to accurately reflect the effect of additional cyclic hardening on the predicted lifetime, Vantadori has recently formulated a strain-based fatigue criterion which implements a novel strain factor (function of material constants and degree of non-proportionality) in the damage parameter relationship. By considering some experimental data available in the literature, the goal of the present paper is to discuss the accuracy of the present criterion in estimating fatigue lifetime of metallic components, especially under non-proportional loading.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
