Work

Advances in low cycle fatigue probabilistic modeling

Year: 2024

Type: article

Abstract: New advances in the probabilistic S-N model proposed by Castillo and Canteli are presented. The requirements for a S-N model derivation to be valid are emphasized, in particular, that of the compatibility between the statistical distributions of lifetime and stress reference variable. The definition of the generalized reference variable (GRV) in the S-N field, as GRV=ψ·σM, where ψ is a non-dimensional factor derived from the σ-ε law of the material, allows the former model to be applied to LCF data. The new model ensures the incontrovertible and unitary definition of the scatter band in the S-N field and the justification of an asymptotic lower limit of the lifetime, N0. As a result, the stress- and strain-based approaches can be envisaged as a unique probabilistic ψσM-N approach applicable in the three conventional, i.e., LCF, HCF and VHCF domains. An extension as the ψσM-R-N model that includes the stress ratio effect is presented. The utility of the model is confirmed with the assessment of LCF data from different external experimental campaigns.

Source: Theoretical and Applied Fracture Mechanics

DOI: 10.1016/j.tafmec.2024.104611

Authors: A. Fernández-Canteli, E. Castillo, D. Díaz-Salamanca, M. Muñiz-Calvente, S. Seitl

Institutions: Universidad de Oviedo, Brno University of Technology, Czech Academy of Sciences, Institute of Physics of Materials

Language: English

Topic: Fatigue and fracture mechanics

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,620

Funders: Fakulta Stavební, Vysoké Učení Technické v Brně, Ministerstvo Školství, Mládeže a Tělovýchovy, Vysoké Učení Technické v Brně