Results 161 to 170 of about 4,588 (232)
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Apparent fracture toughness for LEFM applications in hydraulic fracture modeling
Engineering Fracture Mechanics, 2020Abstract Linear Elastic Fracture Mechanics (LEFM) is a widely applied theory to numerically simulate hydraulic fracture initiation and propagation in the subsurface. However, LEFM with the typical fracture toughness measured from unconfined laboratory tests does not apply to hydraulic fracturing applications under subsurface conditions because the ...
Hunjoo P Lee +2 more
exaly +3 more sources
Evaluation of the amount of crack growth in 2D LEFM problems
Engineering Fracture Mechanics, 2004 This work proposes an algorithm for the evaluation of the amount of crack growth in two-dimensional problems of linear elastic fracture mechanics. The method is based on the energetic formulation of the coupled displacement-crack propagation problem defined by Nguyen et al. in 1990 in order to study the stability of crack growth in elastic fracture. To
Stefania Fortino, Antonio Bilotta
exaly +4 more sources
Reliability-based fatigue assessment of steel bridges using LEFM – A sensitivity analysis
International Journal of Fatigue, 2016 The lack of an established safety format prohibits a widespread use of linear elastic fracture mechanics (LEFM) for the fatigue assessment of steel bridges. The aim of this study is to facilitate a future development of a deterministic design approach. A
John Leander, Mohammad Al-Emrani
exaly +3 more sources
Avalanche Mechanics: Lefm vs. Gradient Model
, 2008 In this study the initiation of avalanches by failure of the interface between the show slab and the underlying bedrock is considered. A pre-existing shear crack is assumed at the interface, in analogy with the classical work of Palmer and Rice [1] on shear bands in over-consolidated clay.
A. KOSTANTINIDIS +3 more
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A New Way for Polymer Characterisation Using a Combined Approach LEFM – Plastic Zone Corrected LEFM
European Structural Integrity Society, 2003ABSTRACT Toughness quantification of polymers is still an open issue, since no unique fracture mechanics method is able to provide intrinsic crack propagation resistance values over the whole range of material behaviours from brittle to ductile. A sensitive way to characterise the mechanical performance of these materials, exemplified with rubber ...
C Grein, Ph Beguelin
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Numerical Investigation on LEFM Limits under LSY Conditions
Key Engineering Materials, 2013In this work, a parametric numerical investigation on the plastic zone size and shape at the crack front of a through crack in a plate is presented. The thickness of the plate, the size of the crack and the applied remote load values are considered as parameters.
CAPUTO, Francesco +3 more
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Three‐dimensional integration strategies of singular functions introduced by the XFEM in the LEFM
International Journal for Numerical Methods in Engineering, 2012SUMMARYThe use of the extended finite element method in the scope of linear elastic fracture mechanics induces the integration of singular functions in terms of the stiffness matrix and in the computation of stress intensity factors using the interaction integral method.
Hans Minnebo
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LEFM size requirements for the fracture testing of sea ice
International Journal of Fracture, 2000The stress-separation curve obtained for the in-situ response of first-year sea ice is used to obtain specimen size requirements for sea ice fracture tests. Issues of notch sensitivity and minimum size requirements for the applicability of linear elastic fracture mechanics are addressed.
S.V. Mulmule, J.P. Dempsey
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Thin-Walled Structures, 2023 The paper deals with an optimization problem related to axisymmetric membrane shells made of homogeneous, linear and isotropic materials and subject to a cyclic internal pressure.
Hassan Mohamed Abdelalim Abdalla +2 more
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Scaled boundary finite element method for calculating the J-integral based on LEFM
Mechanics of Advanced Materials and Structures, 2023The present study develops the scaled boundary finite element method (SBFEM) to derive the J-integral directly based on defining the rectangular contour. To achieve this, firstly the J-integral is calculated for each element with different path integrals
M. Yazdani, Ali Yavari
semanticscholar +1 more source