Results 241 to 250 of about 9,782,361 (275)
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The effect of pre-strain on fatigue crack growth and crack closure
Engineering Fracture Mechanics, 1976Abstract A single pre-strain ( ϵ = 0.03 ) applied to 2024-T3 material raised the static yield strength from 428 to 480 MN/m 2 . The growth rate of a fatigue crack in the pre-strained material was about twice as large as in the material that was not pre-strained.
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On crack closure and the notch size effect in fatigue
Engineering Fracture Mechanics, 1987Abstract A method for determining the fatigue notch-size-effect is presented based upon the development of closure in the wake of a newly formed crack growing from a notch. A comparison with experimental results is in accord with predictions. The effect of crack closure on the formation of non-propagating cracks at notches and on notch sensitivity is
A.J. McEvily, K. Minakawa
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The Effects of Crack Closure on Ultrasonic Scattering Measurements
1984The ultrasonic scattering from cracks is traditionally modelled by requiring that the stresses vanish on the crack faces. A violation of this assumption is found in real cracks when asperities on opposing faces are forced into contact by closure or applied stresses.
Thompson, Donald, Chimenti, Dale
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Crack closure and the environmental effect on fatigue crack growth
1976Aerospace ...
Schijve, J. (author) +1 more
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Crack Closure and Overload Effects in Fatigue
1983Observations of crack closure occurring during crack propagation in thin sheet materials under variable amplitude cyclic loading are discussed. The studies show that closure in the region immediately adjacent to the crack tip is important in controlling crack growth. From this basis, the Dugdale model and a simple fracture mechanics analysis is used to
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Synergetic Effects of Fatigue Crack Closure Mechanisms
1999Results are presented relating to the relative effect of two closure mechanisms. Two different crack closure mechanisms, closure due to surface roughness induced by shear lips and conventional plasticity-induced closure, are investigated and compared by performing fatigue crack growth tests on aluminum 2024 and technically pure aluminum.
J Zuidema, TM van Soest, M Janssen
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Geometry effect on crack closure
International Journal of Fracture, 1994H. Y. Jung +2 more
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Effects of Rest Time on Fatigue Crack Retardation and Observations of Crack Closure
1976Fatigue cracks grown in compact tension specimens of 2024-T851 aluminum at ΔK = 6.93 MN/m3/2 (R =0.1) were subjected to single-peak overloads of 17.31 MN/m3/2. After the overload, the specimens were held at zero load for periods of 3 min, 1 h, and 20 or more hours before recycling at ΔK = 6.93 MN/m3/2.
WN Sharpe, DM Corbly, AF Grandt
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Effect of Crack Closure on Quantitative ECT Inspection of Closed Fatigue Cracks
2008In this paper, the feasibility to apply a closed fatigue crack as a substitute of a Stress Corrosion Crack (SCC) is investigated aiming at applications to ECT crack sizing. Several testpieces of closed fatigue cracks are fabricated, and ECT signals are measured after selected bending loads being applied to close the crack.
Chen Zhenmao +3 more
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On the effect of crack closure on the rate of fatigue crack propagation
International Journal of Fracture, 1977G. G. Garrett, J. F. Knott
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