Results 111 to 120 of about 27,661 (166)
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International Journal of Fracture, 1986
Dynamic fracture toughness versus crack velocity relations of Homalite-100, polycarbonate, hardened 4340 steel and reaction bonded silicon nitride are reviewed and discrepancies with published data and their probable causes are discussed. Data scatter in published data are attributed in part to the observed fluctuations in crack velocities. The results
A. S. Kobayashi +4 more
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Dynamic fracture toughness versus crack velocity relations of Homalite-100, polycarbonate, hardened 4340 steel and reaction bonded silicon nitride are reviewed and discrepancies with published data and their probable causes are discussed. Data scatter in published data are attributed in part to the observed fluctuations in crack velocities. The results
A. S. Kobayashi +4 more
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Fracture Mechanics - Fracture Toughness Determination
70th EAGE Conference and Exhibition incorporating SPE EUROPEC 2008, 2008Fracture Mechanics has great potential in solving rock mechanics challenges. Therefore software packages like FRACOD2D which make use of such models are being developed. Input to such codes are e.g. fracture toughnesses. This contribution presents a new laboratory method for determination of the resistance of rock to shear fracturing, i.e Mode II ...
T. Backers, O. Stephansson
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Fracture toughness and hydraulic fracturing
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1989Abstract A study of the influence of fracture toughness on the shape of a hydraulically induced fracture is presented. Three-dimensional numerical simulations of fracture propagation show that fracture toughness is not the main controlling parameter if one chooses fracture toughness values determined at ambient conditions.
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Fracture Toughness and Fatigue Threshold of Tough Hydrogels
ACS Macro Letters, 2018Hydrogels of numerous chemical compositions have achieved high fracture toughness on the basis of one physical principle. As a crack advances in such a hydrogel, a polymer network of strong bonds ruptures at the front of the crack and elicits energy dissipation in the bulk of the hydrogel.
Wenlei Zhang +6 more
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Fracture toughness of compact bone
Journal of Biomechanics, 1976The tensile fracture stress (σfr) of longitudinal bovine tibia compact bone specimens was measured as a function of the length (c) and radius of curvature (r) of machined edge cracks. It was established that, for a given value of r, then σFr = Ac −12 − B where A and B are constants.
W, Bonfield, P K, Datta
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1970
Fracture toughness testing is a new approach to measuring the specific conditions under which low-ductility fracture will take place as a result of a crack developing in an elastic stress field. It appears to be independent of the type of crack growth. The development of fracture-toughness test procedures is reviewed, and the areas of current interest ...
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Fracture toughness testing is a new approach to measuring the specific conditions under which low-ductility fracture will take place as a result of a crack developing in an elastic stress field. It appears to be independent of the type of crack growth. The development of fracture-toughness test procedures is reviewed, and the areas of current interest ...
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1976
Fracture toughness is an indication of the resistance of a material to physical separation by a process of unstable macrocrack propagation. Conceptually, it is an intrinsic material parameter that should not vary with changes in specimen size, speed of loading, temperature, etc.
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Fracture toughness is an indication of the resistance of a material to physical separation by a process of unstable macrocrack propagation. Conceptually, it is an intrinsic material parameter that should not vary with changes in specimen size, speed of loading, temperature, etc.
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Fracture Toughness Correlations
2016Optimistically, mode I (1) plane-strain fracture toughness (K IC ) from the theory of linear-elastic fracture mechanics (LEFM) and (2) critical J-integral (J IC ) as per elastic-plastic fracture mechanics (EPFM) theory are properties determined in a laboratory. Hence, K IC and J IC data sets can be used in practical designing procedures.
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Analysis of fracture toughness data
Lifetime Data Analysis, 1995In studies of the fracture toughness of irradiated weld metal, specimens are subjected to an increasing load. The test on any one specimen might be terminated by choice or because the specimen ruptures. Prior to termination, ductile tearing might or might not have occurred. The situation is thus basically one of competing risks, with different types of
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2012
To apply the theory developed in the previous chapters, fracture toughness values must be measured. A wealth of methods for the determination of critical values of the stress intensity factor, R-curve, energy release rate have been developed. A number of these fracture toughness test methods are described here.
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To apply the theory developed in the previous chapters, fracture toughness values must be measured. A wealth of methods for the determination of critical values of the stress intensity factor, R-curve, energy release rate have been developed. A number of these fracture toughness test methods are described here.
openaire +1 more source