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Stress Intensity Factors for slender surface cracks
Author(s) -
Huget W.,
Esser K.,
Grüter L.
Publication year - 1984
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.19840150303
Subject(s) - stress intensity factor , enhanced data rates for gsm evolution , surface (topology) , upper and lower bounds , geometry , tension (geology) , materials science , bending , fracture mechanics , point (geometry) , mathematics , computation , fracture (geology) , aspect ratio (aeronautics) , composite material , mathematical analysis , compression (physics) , engineering , telecommunications , algorithm
A calculation procedure for plates with semi‐elliptical surface cracks under tension and bending with aspect ratios of a/c ≤ 0.2 and arbitrary relative crack depths a/t is presented. For the computation an improved line spring model is used. K 1 ‐values are calculated along the crack contour. For the deepest point of a surface crack the K 1 ‐values are terminated by two well known threshold curves: The upper bound curve is identical with the solution for the edge crack (a/c = 0). The lower bound is described by the results after Newman and Raju for a/c = 0.2. The present K 1 ‐values are in good agreement with both curves. For high a/t‐ratios the maximum K 1 ‐value is found between the deepest and the surface edge point (Q′ and Q″) of the crack. This result could explain among others that crack growth does not conserve the semi‐elliptical shape sometimes.