Results 271 to 280 of about 21,684 (301)
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2021
Simple probabilistic models of fracture of 3D polycrystals involving transgranular and intergranular cracks are based on undamaged paths and appropriate percolation thresholds. In a second part, theoretical extensions of phase field models for crack initiation and propagation to the case of locally heterogeneous and anisotropic fracture energy are ...
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Simple probabilistic models of fracture of 3D polycrystals involving transgranular and intergranular cracks are based on undamaged paths and appropriate percolation thresholds. In a second part, theoretical extensions of phase field models for crack initiation and propagation to the case of locally heterogeneous and anisotropic fracture energy are ...
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Computational crack path prediction
Theoretical and Applied Fracture Mechanics, 1985Abstract A computer program has been developed for the numerical prediction of curved crack growth paths under proportional loading conditions. The numerical prediction is performed by the step-by-step method in cooperation with the stress analysis ahead of the crack tip and the determination of the curved increment of the crack growth.
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Asynchronous cracking with dissimilar paths in multilayer graphene
Nanoscale, 2017Multilayer graphene consists of a stack of single-atomic-thick monolayer graphene sheets bound with π–π interactions and is a fascinating model material opening up a new field of fracture mechanics.
Bongkyun Jang +5 more
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2006
The reliability of a joint subjected to mechanical and thermal loads during processing and service constitutes a major technical problem. Joints contain flaws. The observed strength of a joint depends upon the location and size of the flaws, as well as the crack path through the joint.
Leslie Banks-Sills, Jacob Schwartz
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The reliability of a joint subjected to mechanical and thermal loads during processing and service constitutes a major technical problem. Joints contain flaws. The observed strength of a joint depends upon the location and size of the flaws, as well as the crack path through the joint.
Leslie Banks-Sills, Jacob Schwartz
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Crack closure and crack path prediction for curved cracks under thermal load
Engineering Fracture Mechanics, 1993Abstract Based on an integral equation formulation, a boundary element method is presented for the analysis of curved cracks under mechanical and thermal load. It takes into account possible load and crack shape-dependent crack closure effects. In conjunction with a suitable crack growth criterion, the method enables, by means of an incremental ...
D. Gross, ST. Heimer
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[Crack path in dental amalgams].
Odontostomatologike proodos, 1991The need of amalgam to resist fracture becomes a more evident necessity when restoration margins are taken into consideration. Marginal microcracks permit bacteria to pass beneath the restoration resulting in cement base dessalution, secondary caries and pulp inflammation.
S, Oualint +2 more
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Notes on the paths and stability of cracks
International Journal of Fracture Mechanics, 1966The stress distribution at the tip of a crack can be expanded as a power series. The first term, usually called the stress intensity factor, determines the initiation of fracture in a brittle material. In this paper it is shown that the second, third and fourth terms have the following effects: (a) the second term controls the stability of the ...
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Thermoelastic Investigation of Crack Paths
2007Traditionally fracture mechanics is mostly concerned with the opening mode of crack growth. Stability and crack path problems are relatively well understood in this case and it is expected that a crack grows in its own plane. However, cracks may exist in different orientations and moreover more than one crack may be found in a structure.
R. A. Tomlinson +2 more
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Discrete crack path prediction by an adaptive cohesive crack model
Engineering Fracture Mechanics, 2010In this contribution, an enhancement of the numerical simulation methods for cohesive crack propagation within the finite element framework is introduced. Motivated by some fundamental drawbacks of the standard procedure, which is characterised by an initial implementation of cohesive surfaces, a novel algorithmic approach is presented which allows an ...
G. Geißler, C. Netzker, M. Kaliske
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The linear elastic analysis of cracked bodies and crack paths
Theoretical and Applied Fracture Mechanics, 2015Abstract The linear elastic analysis of cracked bodies is a Twentieth Century development, with the first papers appearing in 1907, but it was not until the introduction of the stress intensity factor concept in 1957 that widespread application to practical engineering problems became possible.
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