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Determining Stress Intensity Factor for Cracked Brazilian Disc Using Extended Finite Element Method


Affiliations
1 Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran, Islamic Republic of
 

Cracked Brazilian Disc specimen is widely used to determine mode I/II and mixed mode fracture toughness of rock. In this study, stress intensity factor on crack tip in this specimen is calculated for various geometrical conditions of cracks using extended-finite element method. In this method, the crack is modeled independent of the mesh. The results show that the dimensionless stress intensity factors for pure Mode I and II increase with increasing crack length. The closed form solutions are introduced to determine the NI and NII for different geometry of crack.

Keywords

Cracked Brazilian Disc (CBD), Stress Intensity Factor (SIF), Extended Finite Element Method (X-FEM), Mixed Mode.
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  • Determining Stress Intensity Factor for Cracked Brazilian Disc Using Extended Finite Element Method

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Authors

M. Eftekhari
Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran, Islamic Republic of
A. Baghbanan
Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran, Islamic Republic of
H. Hashemolhosseini
Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran, Islamic Republic of

Abstract


Cracked Brazilian Disc specimen is widely used to determine mode I/II and mixed mode fracture toughness of rock. In this study, stress intensity factor on crack tip in this specimen is calculated for various geometrical conditions of cracks using extended-finite element method. In this method, the crack is modeled independent of the mesh. The results show that the dimensionless stress intensity factors for pure Mode I and II increase with increasing crack length. The closed form solutions are introduced to determine the NI and NII for different geometry of crack.

Keywords


Cracked Brazilian Disc (CBD), Stress Intensity Factor (SIF), Extended Finite Element Method (X-FEM), Mixed Mode.