Implementation Of The Local Symmetry Criterion For Crack-Growth Simulations

Tilbrook, M. and Hoffman, M. (2004). Implementation Of The Local Symmetry Criterion For Crack-Growth Simulations. In: Atrens, A., Boland, J. N., Clegg, R. and Griffiths, J. R., Structural Integrity and Fracture International Conference (SIF'04), Brisbane, Australia, (339-344). 26-29 September 2004.

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Author Tilbrook, M.
Hoffman, M.
Title of paper Implementation Of The Local Symmetry Criterion For Crack-Growth Simulations
Conference name Structural Integrity and Fracture International Conference (SIF'04)
Conference location Brisbane, Australia
Conference dates 26-29 September 2004
Publication Year 2004
Sub-type Fully published paper
Editor Atrens, A.
Boland, J. N.
Clegg, R.
Griffiths, J. R.
Start page 339
End page 344
Abstract/Summary The local symmetry criterion predicts that cracks under mixed-mode loading will deflect so that the local Mode II stress intensity factor, kII, is zero. An efficient approach is presented for its implementation in finite element simulations of crack propagation, based on the observed linearity of kII over a wide range of deflection angles. This linearity is explained by expressing kII, for the kinked crack, in terms of the global stress intensity factors, KI and KII, and parallel T-stress, Sigma T, for the original straight crack. Deflection angles and crack paths obtained agreed with those obtained using a more cautious search algorithm, and with other deflection criteria. This has been particularly applicable to crack-growth simulations in graded materials, where elastic asymmetry results in mixed-mode loading.
Subjects 290801 Structural Engineering
Keyword local symmetry criterion
crack-growth
simulation
crack
mode II stress intensity factor
SIF
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Conference Paper
Collection: School of Mechanical & Mining Engineering Publications
 
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Created: Fri, 24 Dec 2004, 10:00:00 EST by Lucy Peachey on behalf of Research Management Office