DIRECT METHODS FOR K CALCULATION

F.J.V. Antones  G.G. Costa  J.A.M. Ferreira      

Anales de la Mecánica de la Fractura, nº 19 . 2002 . Pág. 459 -464
Ver (.pdf): Anales19-074

Resumen: The stress intensity factor, K, can be numerically calculated using direct methods, in which the displacements obtained by the finite element method or boundary element method are replaced on analytical expressions containing K on their formulation. Alternatively, K can be determined using indirect methods based on the energy release rate, G. Direct methods are relatively easy to implement but energetic ones are usually more accurate. The objective of this paper is to define and test a different version of the direct methods that considers several terms of the analytical expression of displacements. The finite element method was used to obtain the nodal displacements needed to apply the method. This approach intends to be easy to implement and accurate. The influence ofthe number ofterms and ofthe location ofpoints is studied.

LocalizaciónGerona

Departamento de Engenharia Mecanica, Universidade de Coimbra, Pólo 11, Pinhal de Marrocos, 3030 Coimbra, Portugal
Departamento de Engenharia Mecanica, Universidade de Coimbra, Pólo 11, Pinhal de Marrocos, 3030 Coimbra, Portugal
Departamento de Engenharia Mecanica, Universidade de Coimbra, Pólo 11, Pinhal de Marrocos, 3030 Coimbra, Portugal