Studies on the growth of small cracks have led to the observation that fatigue life of many engineering materials is primarily “crack growth” from micro-structural features, such as inclusion particles, voids, slip-bands or from manufacturing defects. This paper reviews the capabilities of a plasticity-induced crack-closure model to predict fatigue lives of metallic materials using “small-crack...

Purpose: In this work, fatigue crack propagation life of 7020 T7 and 2024 T3 aluminum alloys under the influence of load ratio was predicted by using artificial neural network (ANN). Design/methodology/approach: Numerous phenomenological models have been proposed for predicting fatigue life of the components under the influence of load ratio to take into account the mean load effect. Findings: ...

Abstract The local strain approach (LSA) is an established concept to calculate the fatigue life of mechanical components for failure criterion crack initiation in several fields engineering. In elastic static finite element simulation, critical stress state detected and forms basis elastic–plastic calculation with LSA a post-processing routine. This paper introduces extension options consider ...

In this article a new fretting fatigue life prediction model is presented. The can be classified as variable crack initiation length: the and propagation phases are calculated function of length, among all feasible lengths orientations, that producing minimum considered. proposal direction automatically determined parameters in both phases: propagation. applied to wide experimental campaign tes...

Fatigue in railway overhead line electrification (OLE) contact wires can cause sudden catastrophic failures. The wire interacting with the pantograph both mechanically and electrically is subjected to tension repetitive bending due force. Recently, fatigue failures of OLE have risen prominence increases train speed. To address this a new test configuration has been developed. study focuses on m...

The characterization of critical levels of microstructural damage that can lead to fatigue-crack propagation under high-cycle fatigue loading conditions is a major concern for the aircraft industry with respect to the structural integrity of turbine engine components. The extremely high cyclic frequencies characteristic of in-flight loading spectra necessitate that a damage-tolerant design appr...

This paper summarizes and reviews the findings of our research on AM60B magnesium alloy conducted in past 8 years. It essentially covers three categories: microstructural study, environmental effect, and fatigue crack growth rate of AM60B. The experimental and numerical studies on the influence of casting defects on this particular material’s properties are reviewed in the first part. It has be...