Upper and lower fatigue life limits model using energy-based fatigue properties

Multiaxial effects on LCF behaviour and fatigue failure of AZ31B magnesium extrusion

“…Therefore, the damage term approaches zero resulting in infinite or unrealistic life predications. In the contrary, Jahed-Varvani [63] energy model has an advantage because of the positive elastic strain energy density term. Although the size of shear hysteresis loop at experimental plane in Fig.…”

“…Jahed and Varvani [63,64] proposed an energy-based fatigue model that predicts fatigue life using Coffin-Manson type energy relations. This model is based on the two basic cracking mechanisms: Case A and B.…”

Evaluation of cyclic plasticity models of multi-surface and non-linear hardening by an energy-based fatigue criterion

“…Garud [12] verified his plastic work model to proportional and non-proportional out-of-phase test data generated for the given metal. For this material, life factor of 3 was predicted by his approach.…”

“…When plotted on log-log scales, both curves become straight lines. Garud [12] suggested applying the uniaxial hysteresis loop energy concepts of Morrow to multiaxial fatigue. The model of Jahed and Varvani-Farahani [13] expresses the total energy consisting of two parts, plastic and elastic strain energies, where the plastic strain is related to the hysteresis loop loading shape.…”

Fatigue life estimation of bolt clamped and interference fitted-bolt clamped double shear lap joints using multiaxial fatigue criteria

“…While Kandil-Brown-Miller (KBM) [4], Fatemi-Socie (FS) [5], Li-Zhang (LZH) [6] and Wang-Yao (WY) [7] are among strain based ones. Smith-Watson-Topper (SWT) [8], Glinka et al [9] and Varvani-Farahani (VF) [10] criteria which include the product of stress and strain variants are classified as energy based criteria.…”