Results 251 to 260 of about 500,116 (309)
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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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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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Materials Science and Engineering: A, 1988
Abstract In this paper the problem of cumulative fatigue damage is considered. On the basis of the invariable succession postulate and the invariable damage postulate, a general form for a one-damage-parameter cumulative-damage model is developed. It has been shown that some of the models previously proposed can be obtained as a particular case of ...
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Abstract In this paper the problem of cumulative fatigue damage is considered. On the basis of the invariable succession postulate and the invariable damage postulate, a general form for a one-damage-parameter cumulative-damage model is developed. It has been shown that some of the models previously proposed can be obtained as a particular case of ...
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Clinical Orthopaedics and Related Research, 1977
Flexural fatigue tests of bovine bone specimens produced fracture surfaces that were transverse on the tension side and oblique on the compression side. Similar fracture patterns were produced by bending tests with a single applied loading. Microscopic examination of flexural fatigue specimens prior to complete established that fatigue fracture is ...
D R, Carter, W C, Hayes
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Flexural fatigue tests of bovine bone specimens produced fracture surfaces that were transverse on the tension side and oblique on the compression side. Similar fracture patterns were produced by bending tests with a single applied loading. Microscopic examination of flexural fatigue specimens prior to complete established that fatigue fracture is ...
D R, Carter, W C, Hayes
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1971
Relationships between the characterization and the nondestructive detection of fatigue damage are discussed and illustrated. Inspection methods presently used at overhaul facilities are reviewed, and examples of the equipment used and the results obtained are given. The advantages and limitations of currently used nondestructive methods are summarized.
JR Barton, FN Kusenberger
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Relationships between the characterization and the nondestructive detection of fatigue damage are discussed and illustrated. Inspection methods presently used at overhaul facilities are reviewed, and examples of the equipment used and the results obtained are given. The advantages and limitations of currently used nondestructive methods are summarized.
JR Barton, FN Kusenberger
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1986
The plane frame version of a steel jacket platform is analysed by mode acceleration method. The local stresses in the joints of an offshore structure subjected to random wave/current load are derived from the nominal stress response of the structural members using the stress concentration factors.
Ashok Gupta, Ramesh Prasad Singh
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The plane frame version of a steel jacket platform is analysed by mode acceleration method. The local stresses in the joints of an offshore structure subjected to random wave/current load are derived from the nominal stress response of the structural members using the stress concentration factors.
Ashok Gupta, Ramesh Prasad Singh
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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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Multiaxial Fatigue Damage Criterion
Journal of Engineering Materials and Technology, 1988A multiaxial fatigue failure criterion is proposed based on the strain energy density damage law. The proposed criterion is hydrostatic pressure sensitive; includes the effect of the mean stress, and applies to materials which do not obey the idealized Masing type description.
F. Ellyin, K. Golos
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Dissipation and fatigue damage
Materials Testing, 2004Abstract The discussion of fatigue damage is generally separated in two domains: Low Cycle Fatigue (LCF) and High Cycle Fatigue (HCF). The transition zone concerns the case of limited endurance, while the unlimited endurance is generally assimilated with HCF.
Eric Charkaluk, Andrei Constantinescu
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