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FATIGUE LIFE PREDICTION OF WELDED JOINTS—A RE‐ASSESSMENT
Author(s) -
Verreman Yves,
Baïlon JeanPaul,
Masounave Jacques
Publication year - 1987
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.1987.tb01146.x
Subject(s) - welding , structural engineering , fracture mechanics , materials science , finite element method , paris' law , forensic engineering , crack closure , engineering , composite material
Abstract— Fatigue life prediction of welded joints needs an accurate and exhaustive theoretical Fracture Mechanics characterization of weld toe crack propagation. The method proposed by Albrecht et al. leads rapidly to accurate solutions of the LEFM δK‐parameter. However, non‐LEFM short crack behavior within the notch (weld toe) plastic zone must be taken into account. Available information on notch fatigue is surveyed, and practical cases where short crack growth is likely to occur are identified. Based on an elastoplastic finite element analysis, the LEFM validity limits and errors resulting from the misuse of LEFM in fatigue life prediction are quantified.