Results 261 to 270 of about 69,102 (312)

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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Statistical analysis methods of fatigue crack growth rate

Transactions of Tianjin University, 2014
The standard center-cracked tensile specimens M(T) with different widths made of aluminum alloy were designed for fatigue crack growth rate experiments, and the effect of specimen size on the fatigue crack growth rate was discussed. The fitting equation and the p-da/dN-ΔK curve of fatigue crack growth rate (with different confidence and reliability ...
Xiaochen Zhang, Liyang Xie, Jianzhong Liu, Yu Zhang, Anshi Tong, Yuanyuan Ma   +5 more
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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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Fatigue-crack growth rate in overheated ESR steel

Metal Science, 1979
AbstractFatigue-crack growth rates and fracture-toughness values were determined for a low-alloy ESR steel heated between i10 and 1400°C. The effect of α-MnS precipitation on the high-temperature austenite grain boundaries on crack growth rate in the IIb regime (ductile striation mode) and the onset of static overload was shown to be negligible. Only a
R. C. Andrew, G. M. Weston, J. C. Ritter
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Fatigue Crack Growth Rate in 63Sn37Pb Solder Joints

Journal of Electronic Packaging, 1993
Fatigue crack growth rate (FCGR) was determined in shear (Mode II) on notched 63Sn37Pb solder joints at room temperature. The FCGR data correlated reasonably well with the expression da/dN = B (ΔY)b where ΔY was either ΔK, ΔJ, or ΔWp. The value of b for ΔJ and ΔWp was similar to that generally obtained for metals in Mode I loading; however, it was 2-3 ...
Z. Guo, H. Conrad
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Fatigue Crack Growth Rate Testing of Gun Steels

Journal of Pressure Vessel Technology, 1986
Abstract The experimental measurement of fatigue crack growth rates is an integral part of the fracture mechanics approach to safe life estimation in structures subjected to cyclical loading. To assess the variation in crack growth properties, data has been collected from five different gun steels from various sources.
J. Morrison, C. H. Laforce
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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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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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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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Crack growth rate of thermally induced underfill fatigue

2009 59th Electronic Components and Technology Conference, 2009
Failure of organic packages is often accelerated by mechanical failure of an underfill designed to protect the solder joints. The crack growth rate of an underfill under thermal cycling is crucial for package reliability and lifetime prediction. Mechanically-induced fatigue crack growth results have been used in package reliability studies, but ...
Soojae Park, Claudius Feger
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