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A NEW APPROACH TO STRUCTURAL INTEGRITY ASSESSMENT FOR DUCTILE FRACTURE
Author(s) -
Dong Y. M.,
Yang W.,
Hwang K. C.
Publication year - 1990
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.1460-2695.1990.tb00610.x
Subject(s) - failure assessment , instability , tangent , fracture (geology) , tearing , structural engineering , fracture mechanics , materials science , enhanced data rates for gsm evolution , structural integrity , mechanics , engineering , composite material , mathematics , geometry , physics , telecommunications
— A new approach to structural integrity assessment based on ductile fracture is explored in the present paper. A simplified, yet more convenient methodology than the conventional EPRI elastic‐plastic fracture analysis is outlined which assesses the ductile fracture instability of structures by an intersection rather than a tangent construction. The J ‐equivalence principle of crack growth is employed for tearing instability determination of single edge cracked plates. An admissible stress curve method is established with a peak value indicating instability. This approach gives reasonable predictions concerning the burst pressure of pre‐flawed pressure vessels. A theoretical J resistance curve, which is justified by experimental measurements for steels with relatively high yield strength, can be incorporated for a complete analytical characterization of the defect assessment procedure.