Modelling of the Fracture Process Zone in Rock

by A. R. Ingraffea, Cornell Univ, Dep of Structural, Engineering, Ithaca, NY, USA,
P. A. Wawrznek, Cornell Univ, Dep of Structural, Engineering, Ithaca, NY, USA,



Document Type: Proceeding Paper

Part of: Rock Masses: Modeling of Underground Openings/Probability of Slope Failure/Fracture of Intact Rock

Abstract: There are a number of situations in the fracture mechanics of rock in which linear elastic fracture mechanics (LEFM) concepts are inapplicable or insufficient. Two such situations are treated in this paper. In the first, in which LEFM is inapplicable, crack initiation from a smooth hole in a compressively loaded plate is analyzed. In the second example LEFM is insufficient. It involves propagation of a crack in a tension-loaded notched plate the scale of which permits LEFM use only after considerable crack extension. In both problems a fracture process zone is modeled.

Subject Headings: Cracking | Mathematical models | Plates | Load factors | Mathematics | Finite element method | Stress distribution | Rock mechanics

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