Results 251 to 260 of about 2,886,370 (294)
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Improving the Fracture Resistance of Dental Ceramic
Journal of Dental Research, 1977A time-temperature sequence for optimally strengthening dental ceramic by ion exchange was investigated. Stress relaxation occurs at higher temperatures and/or longer times. Improved strengths are obtained in a reasonable period of time that could be used for clinical application.
B, Dunn, M N, Levy, M H, Reisbick
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Metal Science and Heat Treatment, 1992
1. The brittle fracture mechanism was considered taking into consideration the results of earlier conducted works [29, 35, 46]. 2. To determine the brittle strength of iron alloys the equation $$\sigma _{br} \cong 20 000\sqrt {\frac{r}{l},} $$ where r is the radius at the crack tip (most probable 0.01 ...
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1. The brittle fracture mechanism was considered taking into consideration the results of earlier conducted works [29, 35, 46]. 2. To determine the brittle strength of iron alloys the equation $$\sigma _{br} \cong 20 000\sqrt {\frac{r}{l},} $$ where r is the radius at the crack tip (most probable 0.01 ...
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Evaluation of fracture resistance of ceramics: Edge fracture tests
Ceramics International, 2007Advanced oxide and nonoxide ceramics were tested by edge flaking with different indenters. Flaking toughness values obtained with the Rockwell indenter were shown to be practically proportional to fracture toughness values measured by the single edge V-notched beam (SEVNB) method.
George Gogotsi +2 more
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2003
Abstract This article briefly describes the historical development of fracture resistance testing of polymers and reviews several test methods developed for determining the fracture toughness of polymeric materials. The discussion covers J-integral testing, the methods for determining linear elastic fracture toughness, testing of thin ...
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Abstract This article briefly describes the historical development of fracture resistance testing of polymers and reviews several test methods developed for determining the fracture toughness of polymeric materials. The discussion covers J-integral testing, the methods for determining linear elastic fracture toughness, testing of thin ...
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Fracture resistance of notched specimens
Engineering Fracture Mechanics, 1981Abstract This paper gives a theoretical approach to the general problem of the static fracture resistance in the presence of stress concentrations. First of all, an approaching calculation model is proposed for elastic and plastic stress in the reduced section of a circumferentially notched cylindrical bar.
G. Valentin, G. Gasc
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Fracture resistance of materials
1982This section will be concerned with the case of an existing crack; the conditions that led to the initiation of this crack are not of interest for the discussion. For a perfectly brittle extension of this crack by cleavage, the criterion for crack propagation seems fairly easy.
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The Journal of the American Dental Association, 1982
W B, Eames, R L, Lambert
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W B, Eames, R L, Lambert
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Fracture Resistance of Nanocrystalline Ni
Metallurgical and Materials Transactions A, 2007Atomic level simulations are used to study crack propagation mechanisms in nanocrystalline Ni. Digital samples with a mean grain size of 5 and 8 nm containing 125 grains were used. For both grain sizes, the mechanism of crack propagation involves the formation of nanocracks along grain boundaries in the vicinity of the main crack.
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Fracture Resistance of Structural Alloys
1996Abstract Fracture mechanics is a multidisciplinary engineering topic that has foundations in both mechanics and materials science. This article summarizes the microstructural aspect of fracture resistance in structural materials. It provides a discussion on basic fracture principles and schematically illustrates the mechanism of crack ...
K.S. Ravichandran, A.K. Vasudevan
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The resistivity and permeability of fractured rocks
2017Thesis (Ph.D.) (Research by publication) -- University of Adelaide, School of Physical Sciences, 2016.
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