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Effect Of Duration Of Play On Injury Rate In Men's And Women's Ncaa Sport, John Craig Harwood
Effect Of Duration Of Play On Injury Rate In Men's And Women's Ncaa Sport, John Craig Harwood
Electronic Theses and Dissertations
Injury rates increase with added athletic exposures. Mental and physical fatigue is potentially a component of this increase. However, large scale exposure-related injury trends by injury type, sport and sex are scarce. Consequently, the aim of this thesis was to determine whether injury rates are higher later in games and whether these rates vary with respect to sport, injury type and sex. NCAA injury data collected by the Datalys Center for Sports Injury Research and Prevention indicate that relative injury frequency increases in subsequent periods and this increase is uniform across sports. Subsequent period relative injury frequencies were greater in …
Fatigue Crack Growth Of Nps20 Steel Oil Pipe At Varied Orientations, Craig G. L. Taylor
Fatigue Crack Growth Of Nps20 Steel Oil Pipe At Varied Orientations, Craig G. L. Taylor
Electronic Theses and Dissertations
Very few studies concerning fatigue of oil pipe have been conducted using full-scale tests. Further, no research is found in open literature concerning fatigue cracks in the longitudinal direction of pipes, despite being deemed more critical. Fatigue crack growth was investigated in NPS 20, API 5L X-70 grade, straight-seam steel oil pipes in the base metal and at the welded joint for various orientations. Specifically, the effect of the welded joint and crack orientation on the fatigue crack growth behaviour relative to a longitudinal crack in the base metal was determined. The fatigue crack growth behaviour of a longitudinal crack …