Fatigue research

Greenwood, M. Woods, H. M., Yule, G. U. (1919). "The Incidence of Industrial Accidents upon Individuals with Special Reference to Multiple Accidents." Industrial Fatigue Research Board Report 4. London Her Majesty s Stationery Office. 

First, the most important loads on wind turbine rotor blades are described and a brief review of fatigue research in composites is presented to place the following approach in a broader perspective. The approach described in this paper concerns modification of the existing formulations. Possible modifications are illustrated with predictions for an existing data set, which was generated by subjecting composite specimens to different variable amplitude load sequences. 

The purpose of the present paper is to report the incorporation of a vide banded, non-atationary loading function, which was based upon measured response of an offshore structure, into a fatigue research program and to present and rationalize the experimental data. 

Farmer, E. and Chambers, E.G. (1926), A Psychological Study of Individual Differences in Accident Rates. London Industrial Fatigue Research Board Report No. 54. 

Fanner, E. Chambers, E.G., A psychological study of individual differences in accident rates, Industrial Fatigue Research Board Rep. 38, HMSO, London, 1926. 

Greenwood, M. Woods, H.M., A report on the incidence of industrial accidents upon individuals with special reference to multiple accidents. Industrial Fatigue Research Board No. 4, Stationary Office, London, 1919,... 

Low-frequency noise (in the range 3-50 Hz) may have other injurious effects on the body. Research has also indicated that a type of fatigue caused by low-frequency noise has a similar effect to that caused by alcohol. Infrasound (low-frequency sound) also has a synergistic effect with alcohol. Low-frequency noise is particularly important in the case of workers operating machinery (e.g. vehicles, cranes, etc.). It must also be remembered that very high power levels may be generated at low frequency and may not be readily detected by the ear. Attenuation of low-frequency noise is very difficult (see Section 42.7). 

Wei, R. P. and Landes, J. D., Correlation between sustained-load and fatigue crack growth in high strength steels . Materials Research and Standards, 9, 25-27, 44, 46 (1969)... 

The importance of amplitude of slip is emphasised above. In recent years, the area of very low amplitudes and very carefully controlled amplitudes has been investigated. These researches confirm that the specific wear rate (volume removed, per unit distance of sliding per unit applied load) increases dramatically in the region 30-70 /xm and then becomes constant, as would be expected in reciprocating or unidirectional sliding . Damage is produced at amplitudes of 1 /xm or less", but it tends to be characteristic of surface fatigue rather than wear. 

Mars, W.V., Comparison of fatigue crack growth characterizations made at several labs, presented at Fracture Mechanics for Elastomers 50 Not Out, Proceedings of Anniversary Meeting Tun Abdul Razak Research Centre, Hertford, United Kingdom, 2008. 

Masahiro Irie received his B.S. and M.S. degrees from Kyoto University and his Ph.D. in radiation chemistry from Osaka University. He joined Hokkaido University as a research associate in 1968 and started his research on photochemistry. In 1973 he moved to Osaka University and developed various types of photoresponsive polymers. In 1988 he was appointed Professor at Kyushu University. In the middle of the 1980 s he invented a new class of photochromic molecules - diaryl-ethenes - which undergo thermally irreversible and fatigue resistant photochromic reactions. He is currently interested in developing singlecrystalline photochromism of the diarylethene derivatives. 

In addition, the use of field fortification samples measures the carefulness factor of the Field Scientist during the field research and allows a Study Director/Manager or distant observer to obtain a quality control estimate on the field portion of the study. For this reason, the field fortification samples are usually meant to be different from laboratory procedural fortifications and are meant to be prepared under field conditions, which are considerably more rigorous than are controlled laboratory conditions. For example, environmental factors such as heat, humidity, wind, human stress, and other human factors such as fatigue to the Field Scientist are an integral part of any field worker exposure/re-entry study. Field fortifications made to matrices under these conditions will test and readily demonstrate the ability of the Field Scientist to perform such a difficult study under trying circumstances. 

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