Results 201 to 210 of about 174,013 (259)
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Damage and fatigue: Continuum damage mechanics modeling for fatigue of materials and structures
Revue européenne de génie civil, 2006ABSTRACT Application of damage mechanics to fatigue is addressed in the present paper. The ability of Lemaitre's damage law to describe low and high cycle fatigue failure of metals is illustrated. Its generalization into an evolution law modeling a damage rate governed by the main dissipative mechanics applies to concrete, elastomers, rocks and to ...
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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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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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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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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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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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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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1989
Cyclic flexural load tests of simply supported beams under central concentrated charge were performed, for two different concrete Young modulus. The strain at the most tensioned fiber was measured during experiments. A model for cumulative damage which is proportional to the strain was used to present the results.
A. Alliche, D. Francois
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Cyclic flexural load tests of simply supported beams under central concentrated charge were performed, for two different concrete Young modulus. The strain at the most tensioned fiber was measured during experiments. A model for cumulative damage which is proportional to the strain was used to present the results.
A. Alliche, D. Francois
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