Results 161 to 170 of about 95,930 (215)
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1996
Metal fatigue is a major cause for failure of mechanical and structural components. We review the fracture mechanics of fatigue and Paris-Erdogan law for the mean behavior. After a consideration of experimental data reported by Virkler et al. (1979), we propose a continuous semimarkov process to model crack growth.
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Metal fatigue is a major cause for failure of mechanical and structural components. We review the fracture mechanics of fatigue and Paris-Erdogan law for the mean behavior. After a consideration of experimental data reported by Virkler et al. (1979), we propose a continuous semimarkov process to model crack growth.
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SAE Technical Paper Series, 1974
<div class="htmlview paragraph">The effects of single and multiple tensile overloads on precracked center-notched sheet specimens of Ti-8 Al-1 Mo-1V titanium alloy were investigated under laboratory conditions. Single tensile overloads always delayed subsequent fatigue crack growth at lower stress levels. Multiple tensile overloads caused a delay
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<div class="htmlview paragraph">The effects of single and multiple tensile overloads on precracked center-notched sheet specimens of Ti-8 Al-1 Mo-1V titanium alloy were investigated under laboratory conditions. Single tensile overloads always delayed subsequent fatigue crack growth at lower stress levels. Multiple tensile overloads caused a delay
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1996
AbstractThis article describes the fracture mechanics in fatigue. It discusses the fatigue crack growth rate (FCGR) testing that consists of several steps, beginning with selecting the specimen size, geometry, and crack length measurement technique. The two major aspects of FCGR test analysis are to ensure suitability of the test data and to calculate ...
Ashok Saxena, Christopher L. Muhlstein
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AbstractThis article describes the fracture mechanics in fatigue. It discusses the fatigue crack growth rate (FCGR) testing that consists of several steps, beginning with selecting the specimen size, geometry, and crack length measurement technique. The two major aspects of FCGR test analysis are to ensure suitability of the test data and to calculate ...
Ashok Saxena, Christopher L. Muhlstein
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1994
In this chapter the main factors influencing high temperature creep—fatigue crack growth in engineering materials are discussed. The significance of minimum to maximum load ratio R, frequency, environment and temperature are considered in turn. Transgranular cycle dependent and intergranular time dependent controlled cracking processes are identified ...
G. A. Webster, R. A. Ainsworth
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In this chapter the main factors influencing high temperature creep—fatigue crack growth in engineering materials are discussed. The significance of minimum to maximum load ratio R, frequency, environment and temperature are considered in turn. Transgranular cycle dependent and intergranular time dependent controlled cracking processes are identified ...
G. A. Webster, R. A. Ainsworth
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Chaos caused by fatigue crack growth
Chaos, Solitons & Fractals, 2003zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Foong, Chee-Hoe +3 more
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Fatigue Crack Growth from Compression Pre-Cracks
Materials Performance and Characterization, 2015Abstract The compression pre-crack method can be used to develop near-threshold fatigue crack growth rates much quicker than the ASTM standard load shed method. The compression pre-crack method is faster than the standard method and eliminates load history effects that are of concern when the standard method is used.
Meghan J. Borz +3 more
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2009
Abstract Understanding fatigue crack growth is critical for the safe operation of many structural components. This article reviews the standard fracture mechanics and methods to determine the crack growth rate for a material and loading condition experimentally.
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Abstract Understanding fatigue crack growth is critical for the safe operation of many structural components. This article reviews the standard fracture mechanics and methods to determine the crack growth rate for a material and loading condition experimentally.
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1987
In this chapter, the technologically important subject of fatigue at high temperatures is taken up again. In Chapter 18, fatigue failure due to more or less homogeneous cavitation of grain boundaries in the whole specimen was discussed, whereas now failure by the growth of cracks under cyclic-loading conditions will be investigated.
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In this chapter, the technologically important subject of fatigue at high temperatures is taken up again. In Chapter 18, fatigue failure due to more or less homogeneous cavitation of grain boundaries in the whole specimen was discussed, whereas now failure by the growth of cracks under cyclic-loading conditions will be investigated.
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FATIGUE CRACK GROWTH UNDER ULTRASONIC FATIGUE LOADING
Fatigue & Fracture of Engineering Materials & Structures, 1997Abstract— In this paper, a stress and modal analysis of an ultrasonic vibration system consisting of a notched specimen and one or two amplifying horns have been performed by using 3D finite element calculations. The stress intensity factors in ultrasonic fatigue crack propagation are evaluated by means of displacement and energy approaches.
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Probabilistic fatigue crack growth
1997In the previous chapters we have treated the crack initiation and propagation process in a deterministic manner. However, there is ample evidence which indicates a variability in strength of components/samples of the same shape manufactured in an identical fashion. This was briefly discussed in section 1.6 (see also Fig. 1.17).
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