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WEIGHT FUNCTIONS AND STRESS INTENSITY FACTORS FOR SEMI‐ELLIPTICAL CRACKS IN T‐PLATE WELDED JOINTS
Author(s) -
Wang X,
Lambert SB
Publication year - 1998
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 - 10.1046/j.1460-2695.1998.00472.x
Subject(s) - stress intensity factor , weight function , finite element method , materials science , bending , welding , stress field , tension (geology) , stress (linguistics) , geometry , structural engineering , stress concentration , point (geometry) , intensity (physics) , surface (topology) , composite material , mathematics , optics , mathematical analysis , physics , engineering , compression (physics) , linguistics , philosophy
Weight functions were derived for the deepest point and surface point of a semi‐elliptical surface crack in T‐plate joints with weld angles between 0 and 45°. These weight functions were derived from reference stress intensity factor solutions obtained from three‐dimensional finite element calculations, and verified using stress intensity factors for different non‐linear stress fields and for far‐field tension and bending cases. The differences between the weight function predictions and the finite element data were less than 10%. They are suitable for semi‐elliptical surface cracks with aspect ratios in the range 0.05 ≤ a/c ≤ 1, together with relative depths 0 ≤ a/t ≤ 0.6 and weld angles 0 ≤ φ ≤ 45°.