Results 261 to 270 of about 230,446 (308)

Crack Growth rate during irregular loading

2003
An aircraft cracked component can be approximated as a wide plate with a centre-crack. The component is subjected to the following repeated load sequence: 5, 120, 15, 91, 18, 75, 40, 80, 10, 110 MPa. A crack of length 20 mm has been detected in the component. Evaluate the crack growth rate at this crack length using the root-meansquare (RMS) method.
Sp. Pantelakis, P. Papanikos
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Variability in Fatigue Crack Growth Rate Testing

Journal of Testing and Evaluation, 1975
Abstract To provide the data necessary to develop a recommended practice for fatigue crack growth rate testing, an extensive interlaboratory (round robin) program was conducted and the variability and bias associated with the current state of the art of fatigue crack growth rate testing was determined.
WG Clark, SJ Hudak
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Fatigue crack growth rate of zirconia ceramics

Journal of the European Ceramic Society, 1997
Abstract This paper investigates the fatigue crack growth behaviours of 3 mol% Y2O3 partially stabilized zirconia (Y-PSZ). Stable fatigue crack growth rate under tension-tension loading was measured from the indentation flaw under three-point bending. The influence of stress ratio on the fatigue crack growth rate was also studied.
Jiun-Ren Hwang, Jiunn-Long Shih, Ming-Chang Jeng   +2 more
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Prediction of fatigue crack growth rates based on crack blunting

Engineering Fracture Mechanics, 1994
Abstract An energy approach is taken to predict fatigue crack growth rates. By including the strain energy released by crack blunting, an expression for fatigue crack growth is derived that depends upon the applied ΔK and the material's modulus, yield strength and fracture toughness.
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Crack Growth Rate Behavior of Ni Alloys

CORROSION 2000, 2000
Abstract The stress corrosion crack growth rate of Alloy 182 weld metal and sensitized Alloy 600 was studied under highly controlled water chemistry conditions at 288 °C. This continuing program has found that the effects of corrosion potential, water chemistry, stress intensity, cold work, etc.
Peter L. Andresen, Thomas M. Angeliu, Paul W. Emigh, Lisa M. Young, Ron M Horn   +4 more
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THE RELATION BETWEEN CRACK BLUNTING AND FATIGUE CRACK GROWTH RATES

Fatigue & Fracture of Engineering Materials & Structures, 1994
Abstract— Previous work has shown that the inclusion of the strain energy released by crack blunting leads to an energy minimum for fatigue crack growth that can be used to predict stage II fatigue crack growth. The present work assumes a polynomial relation between crack blunting and crack extension to derive an expression for the rate of fatigue ...
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Creep crack growth by grain boundary cavitation: crack tip fields and crack growth rates under transient conditions

International Journal of Fracture, 1988
Transient creep crack growth due to grain boundary cavitation, and under plane strain and small scale creep conditions, is investigated. Full account is taken of the finite geometry changes accompanying crack tip blunting and the material is characterized as an elastic-power law creeping solid with an additional contribution to the creep rate arising ...
F. Z. Li, A. Needleman, C. F. Shih
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A rate-dependent criterion for crack growth

International Journal of Fracture, 1979
The Griffith instability criterion for crack propagation is generalized to provide a criterion for time-dependent crack growth. Our procedure is similar to that of Griffith in its use of a global energy balance. The Griffith method is generalized by the inclusion of the rate-of-energy dissipation term in the balance law.
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An investigation on fatigue crack growth rates through a designed nonsymmetric crack growth test

Engineering Fracture Mechanics, 2012
A nonsymmetric fatigue crack growth (FCG) test is specially designed and performed to study whether FCG test data from nonsymmetric cracking which is unavoidable in practice can be used to determine valid FCG rate information for fatigue life evaluation.
He, Xiaofan, Tan, Mingyi, Xing, Jing Tang   +2 more
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High strain-rate crack growth in rate-dependent plastic solids

Journal of the Mechanics and Physics of Solids, 1985
Abstract At high crack velocities in metallic materials nearly all plastic strain accumulates at very high strain-rates, typically in the range 10 3 s −1 to 10 5 s −1 . At these rates, dislocation motion is limited by dynamic lattice effects and the plastic strain-rate increases approximately linearly with stress. The problem for a crack growing
L.B. Freund, J.W. Hutchinson
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