Relevance of Nonlinear Fracture Mechanics to Creep Cracking

KM Nikbin; GA Webster; CE Turner

doi:10.1520/STP28637S

SYMPOSIA PAPER Published: 01 January 1976

STP28637S

Relevance of Nonlinear Fracture Mechanics to Creep Cracking

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Creep crack growth tests, conducted on contoured double cantilever beam (DCB) specimens are described for aluminium alloy RR58 and a chromium-molybdenum-vanadium steel. The results are analyzed in terms of ˙J, the rate equivalent of the J contour integral, which is a nonlinear fracture mechanics parameter. Direct proportionality is found between crack growth rate, ˙a and ˙J. The treatment is shown to reveal a unification of the linear elastic fracture mechanics and net section or reference stress descriptions of creep cracking.

Author Information

Nikbin, KM

Imperial College, London, England

Webster, GA

Imperial College, London, England

Turner, CE

Imperial College, London, England

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Details

Developed by Committee: E08

Pages: 47–62

DOI: 10.1520/STP28637S

ISBN-EB: 978-0-8031-4676-1

ISBN-13: 978-0-8031-0318-4

Relevance of Nonlinear Fracture Mechanics to Creep Cracking

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