Determination of the mixed mode I/II fracture characteristics of heat-treated granite specimens based on the extended finite element method
TL;DR: In this paper, the mixed mode I/II fracture characteristics of heat-treated granite were investigated by means of the extended finite element method (XFEM), which is based on the cohesive zone model (CZM).
About: This article is published in Engineering Fracture Mechanics.The article was published on 2021-07-01. It has received 15 citations till now. The article focuses on the topics: Fracture mechanics & Cohesive zone model.
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TL;DR: In this paper , a modified phase-field method was developed to fully consider the mixed-mode failure and shear strength degradation during the SC-CO 2 fracturing (SCF) process.
11 citations
TL;DR: In this paper , a comprehensive experiment on the crack straight-through flattened Brazilian disc specimens of crumb rubber concrete (CRC) is undertaken, and three specific experiments were performed to obtain the wide loading-rate ranges of fracture characteristics, i.e., the quasi-static test, drop-hammer impact test, and split Hopkinson pressure bar test.
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TL;DR: In this paper , an analytical method was introduced to investigate the size effect on the unstable fracture toughness of fine-grained quartz-diorite, which can predict the axial load, crack mouth opening displacement and crack resistance curve of the three-point bend specimen when the elastic modulus, tensile strength, fracture energy, and initial fracture toughness are given.
5 citations
TL;DR: In this paper , the effect of temperature on rock fracture behavior under four loading modes; pure mode I, pure mode II, and two mixed-mode loadings I/II in SCB specimens of clay-rich rocks (mudstone).
5 citations
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4,211 citations
TL;DR: In this article, a minimal remeshing finite element method for crack growth is presented, where Discontinuous enrichment functions are added to the finite element approximation to account for the presence of the crack.
Abstract: A minimal remeshing finite element method for crack growth is presented. Discontinuous enrichment functions are added to the finite element approximation to account for the presence of the crack. This method allows the crack to be arbitrarily aligned within the mesh. For severely curved cracks, remeshing may be needed but only away from the crack tip where remeshing is much easier. Results are presented for a wide range of two-dimensional crack problems showing excellent accuracy. Copyright © 1999 John Wiley & Sons, Ltd.
4,185 citations
TL;DR: In this paper, a review of the cohesive process zone model, a general model which can deal with the nonlinear zone ahead of the crack tip, is presented, which is able to adequately predict the behaviour of uncracked structures, including those with blunt notches, and not only the response of bodies with cracks.
965 citations
TL;DR: A review of recent work on microcracks in rock can be found in this paper, with a focus on the morphogenesis, kinematics, dynamics, population statistics and observational techniques.
812 citations
TL;DR: An algorithm which couples the level set method (LSM) with the extended finite element method (X‐FEM) to model crack growth is described, which requires no remeshing as the crack progresses, making the algorithm very efficient.
Abstract: SUMMARYAn algorithm which couples the level set method (LSM) with the extended!nite element method(X-FEM) to model crack growth is described. The level set method is used to represent the cracklocation, including the location of crack tips. The extended!nite element method is used to computethe stress and displacement!elds necessary for determining the rate of crack growth. This combinedmethod requires no remeshing as the crack progresses, making the algorithm very e#cient. Thecombination of these methods has a tremendous potential for a wide range of applications. Numericalexamples are presented to demonstrate the accuracy of the combined methods. Copyright ? 2001John Wiley & Sons, Ltd. KEY WORDS : extended!nite elements method; level set method; crack growth 1. INTRODUCTIONIn this paper, we describe an algorithm where the level set method (LSM) is coupled withthe extended!nite element method (X-FEM) [1–3] to model crack growth. The LSM isa numerical scheme developed by Osher and Sethian [4] to model the motion of interfaces.In the LSM the interface is represented as the zero level set of a function of one higherdimension. The current formulation of the LSM has no provision for modelling free movingendpoints on curves or free moving edges on surfaces. A similar level set representation wasused in Reference [5] to model the evolution of a curve segment. However, unlike the methodpresented here, in Reference [5] the endpoints of the evolving curve segment remain!xed.We present an extension of the LSM for modelling the evolution of an open curve segmentand use this extension to model the growth of a fatigue crack.
747 citations