Results 201 to 210 of about 342,663 (257)
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Fatigue damage of human tendons
Journal of Biomechanics, 2002The study was designed to examine the effects of partial fatigue on specific mechanical parameters which characterise human tendons in vitro. Specimens prepared from 12 intact Extensor digitorum longus tendons of the foot were subjected to partial fatigue, equivalent to 25% of the median fatigue life, by a cyclic square tension-tension stress waveform ...
H, Schechtman, D L, Bader
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Fatigue Damage in Composite Materials
International Applied Mechanics, 2002Summary: The paper deals with the problems of fatigue of laminated composite materials. The authors emphasize the necessity of calculation of the material microparameters together with the macroparameters of layers and the construction in the whole. The paper provides a survey of results.
Revuelta, D., Miravete, A.
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Exercise, Muscle Damage and Fatigue*
Sports Medicine, 1992Fatigue as a functional sign and muscle damage as a structural sign can be observed after prolonged exercise like marathon running or after strenuous exercise, especially with the involvement of eccentric contractions. For fatigue due to prolonged exercise, hypoxic conditions and the formation of free oxygen radicals seem to be of aetiological ...
H J, Appell, J M, Soares, J A, Duarte
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International Journal of Structural Integrity, 2012
PurposeComposite materials are increasingly used in the structural and mechanical fields, thanks to their high strength‐to‐weight ratios and the possibility of tailoring them to meet specific requirements. This study is focused on the damage to a glass fiber reinforced composite under different loading conditions.
COLOMBO, CHIARA +2 more
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PurposeComposite materials are increasingly used in the structural and mechanical fields, thanks to their high strength‐to‐weight ratios and the possibility of tailoring them to meet specific requirements. This study is focused on the damage to a glass fiber reinforced composite under different loading conditions.
COLOMBO, CHIARA +2 more
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Fatigue Damage Tolerant Analysis Using the Fatigue Damage Map
2006Based on the principles of microstructural fracture mechanics the current work demonstrates the physical relationship between the size of crack plasticity and the five stages of crack growth from catastrophic crack initiation to failure. The relationship allows the continuous evaluation and distinction of the five stages of fatigue damage in the form ...
C. A. Rodopoulos, J. R. Yates
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Evolution of fatigue damage using the fatigue damage map method
Theoretical and Applied Fracture Mechanics, 2006Using only readily available material properties and the concept of the fatigue damage map the work attends to develop a methodology able to predict crack tip propagation rates characterising each of the fatigue stages, namely crack arrest, microstructurally and physically short crack (Stage I), long crack growth (Stage II) and Stage III growth.
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Journal of Fluids Engineering, 1954
Abstract An experimental investigation was conducted to study the effects of cumulative fatigue damage on endurance life. Stepwise-varying stress sequences were applied to rotating-cantilever-beam specimens. Typical curves of fatigue damage versus cycle ratio were deduced. The effect of scatter in the test results was evaluated.
S. M. Marco, W. L. Starkey
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Abstract An experimental investigation was conducted to study the effects of cumulative fatigue damage on endurance life. Stepwise-varying stress sequences were applied to rotating-cantilever-beam specimens. Typical curves of fatigue damage versus cycle ratio were deduced. The effect of scatter in the test results was evaluated.
S. M. Marco, W. L. Starkey
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Journal of Engineering Mechanics, 1992
Three‐point bending fatigue tests are performed on two types of concrete using two different R ratios. The maximum strain is recorded during the tests. A damage mechanics model for the fatigue of concrete is proposed. It is based on a damage parameter proportional to the irreversible increment per cycle of the largest principal positive strain.
A. Alliche, D. Frangois
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Three‐point bending fatigue tests are performed on two types of concrete using two different R ratios. The maximum strain is recorded during the tests. A damage mechanics model for the fatigue of concrete is proposed. It is based on a damage parameter proportional to the irreversible increment per cycle of the largest principal positive strain.
A. Alliche, D. Frangois
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2008
Collagenous tissues can, inevitably, be damaged and broken by overload, but they are also susceptible to the prolonged application of a lesser load. The majority of studies are for bone with tendon in the second place. This chapter therefore concentrates on these tissues.
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Collagenous tissues can, inevitably, be damaged and broken by overload, but they are also susceptible to the prolonged application of a lesser load. The majority of studies are for bone with tendon in the second place. This chapter therefore concentrates on these tissues.
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Remodeling and the repair of fatigue damage
Calcified Tissue International, 1993This paper reviews the direct and indirect evidence for and against the idea that bone remodeling repairs fatigue damage. It defines experiments that should be performed to determine whether the accumulation and repair of fatigue damage is relevant to the pathogenesis of osteoporotic fracture.
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