Finite element simulation of elastic-creep growth of a semicircular surface crack

✍ Scribed by S.D. Smith; J.J. Webster; T.H. Hyde

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 890 KB
• Volume: 31
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(88)90205-6

✦ Synopsis

An

initially semicircular crack loaded in Mode I tension with a material model similar to 316 SS at 600°C has been simulated using the finite element method. Two techniques have been used to predict creep crack growth. One technique assumes that the rate of crack growth does not effect the crack tip stress and strain rate distributions and that crack growth is determined by the stationary state conditions. A second technique is a more general approach. The crack is extended by the node release technique. Crack growth was predicted throughout on the basis of the C* contour integral. When the stresses were non-stationary, this is termed C(r) and was used instead of C* in the creep crack growth rate expression. Stresses, creep strains and displacements are discussed for this simulation.