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2012
Components in engineering applications operating under cyclic loads, commonly known as fatigue, may become unstable and cause catastrophic failure to occur unexpectedly because of structural instability. It is generally thought that over 80 % of all service failures are associated with fatigue. Therefore, operation of machines or their components under
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Components in engineering applications operating under cyclic loads, commonly known as fatigue, may become unstable and cause catastrophic failure to occur unexpectedly because of structural instability. It is generally thought that over 80 % of all service failures are associated with fatigue. Therefore, operation of machines or their components under
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Cyclic fatigue of a model feldspathic porcelain
Dental Materials, 1995This study was conducted to evaluate the fatigue parameters of a model porcelain based on the Weinstein patent using cyclic fatigue and to compare the parametric values obtained from cyclic fatigue tests with those from dynamic fatigue tests previously reported by Fairhurst et al.
S W, Twiggs +3 more
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Analysis of Muscular Fatigue during Cyclic Dynamic Movement
2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2007We have investigated the electromyographic manifestations of fatigue on the Biceps Brachii in prolonged isometric and dynamic contractions by using two spectral analyses (Fourier transform (FT) and continuous wavelet transform (CWT)) as references and a novel approach cyclostationarity analysis.
Cao, H. +3 more
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Cyclic Fatigue of Silicon Nitrides
2008A four-point bending jig was used to determine the cyclic fatigue behavior of one hot-pressed and two different sintered silicon nitrides. The lowest fatigue strengths were obtained in the cyclic tension compression mode, indicating that compressive stresses are effective in advancing the growth of subcritical cracks.
A. -P. Nlkkila, T. A. Mntyla
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Engineering Fracture Mechanics, 1991
Abstract Methods for calculating the fatigue life of cables with an infinite number of parallel wires are presented. The methods account for the effects of cable legnth and the increase in stress range that occurs as cable wires break. Comparisons are made with fatigue lives of cables with finite numbers of wires calculated by Monte Carlo simulation.
J.M. Stallings, K.H. Frank
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Abstract Methods for calculating the fatigue life of cables with an infinite number of parallel wires are presented. The methods account for the effects of cable legnth and the increase in stress range that occurs as cable wires break. Comparisons are made with fatigue lives of cables with finite numbers of wires calculated by Monte Carlo simulation.
J.M. Stallings, K.H. Frank
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Muscle Fatigue and Fatigue-Related Biomechanical Changes During a Cyclic Lifting Task
Spine, 2003Electromyographic and biomechanical methods were utilized to investigate correlations between indexes of localized muscle fatigue and changes in the kinematics and kinetics of motion during a cyclic lifting task.Recent advances in time-frequency analysis procedures for electromyographicic signal processing provide a new way of studying localized muscle
BONATO P +6 more
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Cyclic fatigue in silicon nitride ceramics
Acta Metallurgica et Materialia, 1994Abstract Static and cyclic fatigue behavior was investigated for two kinds of silicon nitride with different microstructures. These materials hardly show rising R-curve behavior. Nevertheless the considerable cyclic loading effect is obviously recognized in them.
G. Choi, S. Horibe, Y. Kawabe
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Cyclic loading and fatigue in ice
Cold Regions Science and Technology, 1981Abstract Isotropic polycrystalline ice was subjected to cyclic loading in uniaxial compression at −5°C, with stress limits 0–2 and 0–3 MPa, and frequencies in the range 0.043 to 0.5 Hz. Stress-strain records showed hysteresis loops progressing along the strain axis at non-uniform rates.
Malcolm Mellor, David Cole
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Cyclic Fatigue behavior of Ceramics
1983In recent years, ceramics have been investigated because of their application as structual components at high temperature. A great deal of this research has dealt with various mechanical properties. Although, considerable effort has been made in the study of fracture strength and creep properties, comparatively a little is known about the fatigue ...
Y. Matsuo +3 more
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Cyclic Fatigue in Metal Bellows
Volume 3: Design and Analysis, 2013Engineers who encounter the need for metal bellows expansion joints in piping and heat exchangers are often challenged by cyclic fatigue life calculation methods. ASME has published formulas for predicting low cycle fatigue life of metal bellows. Both B31.3 Appendix X and BPVC VIII Appendix 26 are similar in their approach, but are based on a data set ...
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