| Popis: |
In this paper, based on the orthotropic theory, the stress distribution in front of the crack tip and the stress intensity factor for a finite specimen with central crack were calculated by FEM using eight nodes isoparametric elements with singular elements at crack tip. For the specimen with crack perpendicular to the loading direction, only one quarter of the specimen was consided, because of the symmetry. For specimen with inclined crack, half of the specimen was consided, because of the asymmetry. The calculated stress intensity factors agreed well with the previous results by Bowie, Gandhi and Tong. |
