Fatigue testing properties

Transage 129 Room temperature load-controlled fatigue test properties... 

Whenever changes in mechanical properties, such as performance in tension tests, fatigue tests, and impact tests, are to be used as a measure of... 

The degradation of the matrix in a moist environment strongly dominates the material response properties under temperature, humidity, and stress fatigue tests. The intrinsic moisture sensitivity of the epoxy matrices arises directly from the resin chemical structure, such as the presence of hydrophilic polar and hydrogen grouping, as well as from microscopic defects of the network structure, such as heterogeneous crosslinking densities. 

Evaluation of the fatigue properties of elastomers suitable for cardiovascular application is currently a long, and therefore, costly proposition. This is especially true if the fatigue tests are to be conducted in contact with blood. 

Fatigue is the decay of mechanical properties after repeated application of stress and strain. Fatigue tests given information about the ability of a material to resist the development of cracks or crazes resulting from a large number of deformation cycles. 

Mechanical Characterization of Sulfur-Asphalt. The serviceable life of a pavement comes to an end when the distress it suffers from traffic and climatic stresses reduces significantly either the structural capacity or riding quality of the pavement below an acceptable minimum. Consequently, the material properties of most interest to pavement designers are those which permit the prediction of the various forms of distress—resilient modulus, fatigue, creep, time-temperature shift, rutting parameters, and thermal coefficient of expansion. These material properties are determined from resilient modulus tests, flexure fatigue tests, creep tests, permanent deformation tests, and thermal expansion tests. 

Immersion in water does not always have adverse effects. Sometimes the properties improve, or some properties may improve and others deteriorate. Kosuri and Weitsman [79] and Smith and Weitsman [80] conducted fatigue tests (5Hz at 74-89% ultimate tensile strength) on cross-plied AS4/ 3501-6 prepreg carbon/epoxy laminates in three conditions ... 

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