Results 211 to 220 of about 25,058 (265)

The Rate of Growth of Fatigue Cracks

Journal of Applied Mechanics, 1936
Abstract The author discusses the resistance of metal to the propagation of cracks, and points out that in the accepted method of fatigue testing the results are not conclusive because there is no distinction between (1) the load and the number of repeated stresses required to start cracks and (2) the load and the number of reversals ...
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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 growth rate and cracking velocity in fatigue for a class of ceramics

Theoretical and Applied Fracture Mechanics, 1999
Abstract Fatigue crack growth rate data and cracking velocity data are studied for a class of ceramics including SiC, TiB2, Si3N4, ZrO2 and Al2O3. Both sine and square wave cyclic loading are combined such that the data could be converted to cracking velocity for a given frequency of cyclic load.
X.L Zheng, J.H Yan, K Zhao
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Fatigue crack path manipulation for crack growth rate measurement

Engineering Fracture Mechanics, 2016
Abstract It is accepted that fatigue crack paths in metals that display confined slip, such as high strength aluminium alloys, are responsive to loading direction and local microstructural orientation. It is less well recognised that crack paths in these alloys are also responsive to the loading history since certain loading sequences can produce ...
S. Barter, P. White, M. Burchill
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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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Fatigue Crack Growth Rate Data Assessment

Volume 4: Materials and Fabrication, 2021
Abstract A comprehensive fatigue test database was developed in PRCI SIA-1-1 and IM-3-2 projects, where there are 185 sets of fatigue crack growth rate parameters (i.e., C and m fitting coefficients in the Paris law) calculated from compact tension (CT) fatigue test data.
Enyang D. Wang, Sanjay Tiku, Aaron Dinovitzer   +2 more
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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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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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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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