SYMPOSIA PAPER Published: 01 January 1976
STP28637S

Relevance of Nonlinear Fracture Mechanics to Creep Cracking

Source

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