Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/7673
Title: Stress intensity factor calculation based on the work of external forces
Authors: Antunes, F. V. 
Ferreira, J. M. 
Byrne, J. 
Issue Date: 1999
Citation: International Journal of Fracture. 98:1 (1999) 1-14
Abstract: Abstract The external forces method is a numerical method for K calculation based on the finite element method. It uses the work of the external forces W for the calculation of the energy release rate and is particularly advantageous when that forces are applied far from the crack front. The method was applied to a corner crack geometry with the objective of studying its accuracy. Good results were obtained for a wide range of virtual crack displacements (0.03% < ?a/a < 6%) considering 4 values of W along with a polynomial regression of order 3. For that choice of parameters the inaccuracy of K is mainly due to FEM errors. A great sensitivity of K to FEM errors was observed, however accurate values of K were obtained, with errors lower than 2 percent. So, the use of the external forces method for the calculation of K is recommended, considering its simplicity and accuracy.
URI: http://hdl.handle.net/10316/7673
DOI: 10.1023/A:1018684932071
Rights: openAccess
Appears in Collections:FCTUC Eng.Química - Artigos em Revistas Internacionais

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