Fracture Mechanics Parameter Computation Using Generalized Finite Element With Drilling Degrees of Freedom

Kanda, Yasuyuki; Okada, Hiroshi; Iraha, Shigeo; Tomiyama, Jun; Yagawa, Genki

doi:10.2208/jsceja.63.464

Cited by 2 publications

(2 citation statements)

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“…One of the well known techniques to compute the crack parameters is the virtual crack closure-integral method (VCCM) (5)- (9) . VCCM is a very simple technique which computes the energy release rate based only on the nodal forces and displacements.…”

Section: Introductionmentioning

confidence: 99%

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A Virtual Crack Closure-Integral Method for Generalized Finite Element with Drilling and Strain Degrees of Freedoms

Kanda

Okada

Iraha

et al. 2009

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A virtual crack closure-integral method (VCCM) for the generalized finite element with drilling and strain degrees of freedoms (DOFs) is presented in this paper. Free mesh method (FMM) is one of useful methods for fracture mechanics analysis. However, in FMM, quadratic elements with mid-side nodes cannot be employed due to restrictions arising from its local mesh generation rule around each node. Generalized elements with drilling and strain DOFs which have no mid-side nodes may improve the accuracy in fracture mechanics analysis over the conventional constant strain elements. Present authors have proposed a VCCM for two-dimensional generalized elements with drilling DOFs, in their previous papers. In this paper, in order to improve the accuracy in fracture mechanics analysis further, we present a VCCM for generalized finite element with drilling and strain DOFs. Finally, some numerical examples are presented and it is demonstrated that the generalized element with drilling and strain DOFs has superior accuracy over that with drilling DOFs only.

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Section: Introductionmentioning

confidence: 99%

“…Thus, present authors have proposed VCCM using triangle element with drilling DOFs which is one of the generalized finite elements. It was demonstrated that the accuracy of fracture mechanic analysis improved (9) .…”

Section: Introductionmentioning

confidence: 99%