Results 271 to 280 of about 1,411,543 (350)

Markov chain‐assisted stochastic model of crack growth rate

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2023
AbstractOne of the most essential tasks in probabilistic damage tolerance assessment is to describe the scatter in crack growth accurately. This study proposes a stochastic model of the crack growth rate, which calculates the critical parameters of a random distribution accurately by combining the Markov chain and data fitting algorithms.
Kaimin Guo, Hongzhuo Liu, Han Yan, Ziyuan Song, Zixu Guo, Dawei Huang, Xiaojun Yan   +6 more
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Crack growth rate in bent rods

Strength of Materials, 1991
It was shown experimentally on rectangular epoxy rods ruptured by bending that a stress raiser on the surface of the rod, and also an addition of plasticizer to the material, reduce the crack growth rate. The effect of reducing the crack growth rate makes it possible to retain a rectilinear path of crack propagation when there are long arms of load ...
V. V. Grishaev, E. N. Vysotskii
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Crack opening displacement and the rate of fatigue crack growth

International Journal of Fracture Mechanics, 1972
Using a direct proportionality between the rate of fatigue crack growth and crack opening displacement above a threshold, it is shown that fatigue crack growth data for a wide variety of different materials can be accurately described in terms of the mechanical properties and two material constants; the constant of proportionality A and the threshold ...
R. J. Donahue, H. McI Clark, P. Atanmo, R. Kumble, A. J. McEvily   +4 more
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Crack growth in rate sensitive solids

1992
Crack growth in viscoelastic solids has been studied by the energy balance approach [1, 2] and the specification of critical parameters [3–6] associated with rupture in the vicinity of the crack tip. Previous works, however, involved complicated manipulations and expressions that were solvable only by numerical means. Considered in this treatise is the
O. A. Bukharin, L. V. Nikitin
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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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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
openaire   +1 more source