Fatigue crack growth prediction accounting for the damage zone

• Published in: Fatigue & fracture of engineering materials & structures Vol. 28; no. 1-2; pp. 61 - 71
• Main Authors: MRÓZ, Z., SEWERYN, A., TOMCZYK, A.
• Format: Journal Article
• Language: English
• Published: PO Box 1354, 9600 Garsington Road, OxfordOX4 2XG, UK Blackwell Science Ltd 01.01.2005; Blackwell Science
• Subjects: Applied sciences; crack propagation; critical plane; damage accumulation; Exact sciences and technology; Fatigue; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; non-local criterion; ultimate failure; damage accumulation; Prediction; critical plane; ultimate failure; Mechanical properties; Fatigue; Cumulative damage; Fatigue crack; Crack propagation; non- local criterion
• ISSN: 8756-758X; 1460-2695
• DOI: 10.1111/j.1460-2695.2004.00829.x

ABSTRACT The present paper is concerned with modelling of fatigue crack initiation and propagation by applying the non‐local critical plane model, proposed by Seweryn and Mróz. Using the linear elastic stress field at the front of a crack or sharp notch the damage growth on a physical plane is specified in terms of mean values of stress and strength functions. When the damage zone reaches a critical length, crack growth accompanies damage evolution. The model is applied to study crack propagation under cyclically varying tension compression and the predictions are compared with experimental data. The evolution of the damage zone and crack propagation in the biaxial case is considered next.