Strain energy-based multiaxial fatigue life prediction under normal/shear stress interaction

Abstract

Through characterizing the interaction of normal/shear stress–strain behavior on material planes of TC4 alloys, a new strain energy critical plane model describing mean stress effects is proposed for life prediction under tension–compression, pure torsion, and tension–torsion loadings. Moreover, a modified Ince–Glinka model is elaborated through considering crack surface close to the maximum shear strain plane. Three simple solutions are presented to determine cracking failure mode using the concepts of life, damage, and strain. Comparing with lifing models of Liu, Smith–Watson–Topper, and modified Ince–Glinka, the proposed model provides more accurate life predictions for TC4 and a compressor turbine disc by full-scale fatigue testing.

Probabilistic S-N fields based on statistical distributions applied to metallic and composite materials: State of the art

“…Aspects such as sample size, dispersion of the number of cycles to failure for different stress range levels, stress range or maximum stress, and the random variable(s) selected for a given probabilistic fatigue model under consideration influence the statistical distribution. [87][88][89][90] The P-S-N curves discussed in this review are based on the two-and three-parameter Weibull and log-normal distributions. The ASTM E739 standard, Sendeckyj, Castillo and Ferna´ndez-Canteli, and Stu¨ssi models are based on different probabilistic modeling processes that allow to be used in different applications according to the specificities of the material under consideration.…”

Validating generality of recently developed critical plane model for fatigue life assessments using multiaxial test database on seventeen different materials

“…Based on promising outcome of Chu model, Gupta et al 3 , Ince and Glinka 19 , Shun-Peng Zhu et al 20 have made attempts to combine strain energy density and critical plane theory to develop a parameter which is representative of total strain energy density on the critical plane. These bi-axial SWT family of models 3,[18][19][20] call for use of different hypotheses such as Longest Cord (LC)/ Minimum Circumscribing Circle (MCC) 21 /Minimum Circumscribing Ellipse (MCE) 22 for evaluation of resultant shear stress/strain amplitude/mean values on an oblique plane. Recently, Arora et al 23 developed a new, simple to use, bi-axial SWT family model which has eliminated the need for evaluation of the resultant shear stress/strain amplitude/mean values.…”

Application of Life-Dependent Material Parameters to Fatigue Life Prediction under Multiaxial and Non-Zero Mean Loading

“…Among many criteria described in the literature, a group can be distinguished which is characterised by the assumption that components of the stress/strain vector in a material plane with a specific orientation are correlated with the fatigue life. This proposal, called the critical plane approach, has gained great interest [17][18][19][20][21][22][23][24][25][26][27][28]. Depending on the material, strain state, environment, component geometry, and stress amplitude, the fatigue process may be dominated by cracking in the plane of maximum shear or normal stresses [29,30].…”