Results 271 to 280 of about 231,658 (310)

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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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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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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Fatigue crack growth rates in a porous metal

International Journal of Fatigue, 1980
Abstract Fatigue crack growth rates were studied in A1S1 4600 alloy steel containing various levels of porosity. The materials used for the study were prepared using powder metallurgical techniques, with porosity content controlled by hot press-forging of sintered billets.
P DASGUPTA, R QUEENEY
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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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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 numerical approach for determining the crack-tip strain rate in the estimation of crack growth rate

International Journal of Materials and Product Technology, 2001
The finite deformation theory, an updated Lagrangian formulation (ULF), a 3D finite difference equation for heat transfer, and a two-stage geometrical equation for an obstruction-type chip breaker tool face were used to describe the oblique cutting process.
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A Probabilistic Approach to Fatigue Crack Growth Rate

Journal of Engineering Materials and Technology, 1980
A probabilistic model for fatigue crack growth proposed by K. P. Oh is modified in some respects. Under more natural assumptions than Oh’s it is derived that the rate of fatigue crack growth is proportional to some power of the range of the stress intensity factor. It is also shown that the exponent ranges from 2 to 4.
Akira Tsurui, Akito Igarashi
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The effect of crack tip environment on crack growth behaviour of a low alloy steel at cathodic potentials in artificial seawater

Journal of Materials Science and Technology, 2020
Yong Li, Zhiyong Liu, Endian Fan
exaly