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A monographic study of Audouinella in the Atlantic waters of North Carolina reports 15 taxa from coastal and continental shelf habitats. Three of these, A. affinis, A. hoytii, and A. ophioglossa, herein described as a new species,...
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A monographic study of Audouinella in the Atlantic waters of North Carolina reports 15 taxa from coastal and continental shelf habitats. Three of these, A. affinis, A. hoytii, and A. ophioglossa, herein described as a new species, are endemic. Audouinella bispora and A. daviesii are reported from the Carolina flora for the first time. The taxonomy from several historical reports is elucidated, and taxonomic confusions in this complex are clarified.
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Report discusses conceptual designs of automatic digitally controlled vibration fatigue test facilities for inducing high cycle random flexural fatigue of coupon specimens; recommends a facility for use at AFFDL; presents block di...
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Report discusses conceptual designs of automatic digitally controlled vibration fatigue test facilities for inducing high cycle random flexural fatigue of coupon specimens; recommends a facility for use at AFFDL; presents block diagrams and charts of major system components and subsystems. Report also describes random flexural fatigue tests conducted on aluminum and titanium riveted cantilever beam specimens with zero mean stress; presents data for 2024-T81 bare aluminum alloy at 75 degree F and 250 degree F, and for 6Al-4V annealed titanium alloy at 75 degree F and 600 degree F, for the range of ten to the 6th power through ten to the 9th power cycles to failure.
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An analytical and experimental program was conducted to develop acoustic fatigue design criteria for aircraft structures subjected to intense noise in a high temperature environment. Equations for the dynamic response of a buckled...
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An analytical and experimental program was conducted to develop acoustic fatigue design criteria for aircraft structures subjected to intense noise in a high temperature environment. Equations for the dynamic response of a buckled panel were formulated for simply supported boundary conditions using large deflection plate theory. Random amplitude acoustic fatigue testing of representative aircraft structure was accomplished at temperatures tp to 600F to provide data for correlation with the analytical results. Empirical design criteria were developed in the form of equations and nomographs for predictign the thermal and dynamic response of aircraft structures subjected to combined environments. The empirical design criteria are presented in handbook format for design use; examples and computer programs are also presented. (Author)
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摘要 :
An analytical and experimental program was conducted to develop acoustic fatigue design criteria for aircraft structures subjected to intense noise in a high temperature environment. Equations for the dynamic response of a buckled...
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An analytical and experimental program was conducted to develop acoustic fatigue design criteria for aircraft structures subjected to intense noise in a high temperature environment. Equations for the dynamic response of a buckled panel were formulated for simply supported boundary conditions using large deflection plate theory. Random amplitude acoustic fatigue testing of representative aircraft structure was accomplished at temperatures tp to 600F to provide data for correlation with the analytical results. Empirical design criteria were developed in the form of equations and nomographs for predictign the thermal and dynamic response of aircraft structures subjected to combined environments. The empirical design criteria are presented in handbook format for design use; examples and computer programs are also presented. (Author)
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摘要 :
An analytical and experimental program was conducted to develop acoustic fatigue design criteria for aircraft structures subjected to intense noise in a high temperature environment. Equations for the dynamic response of a buckled...
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An analytical and experimental program was conducted to develop acoustic fatigue design criteria for aircraft structures subjected to intense noise in a high temperature environment. Equations for the dynamic response of a buckled panel were formulated for simply supported boundary conditions using large deflection plate theory. Random amplitude acoustic fatigue testing of representative aircraft structure was accomplished at temperatures up to 600 F to provide data for correlation with the analytical results. Empirical design criteria are presented in the form of design equations and nomographs for predicting the combined thermal and dynamic response of aircraft structures. (Author)
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摘要 :
An analytical and experimental program was conducted to develop acoustic fatigue design criteria for aircraft structures subjected to intense noise in a high temperature environment. Equations for the dynamic response of a buckled...
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An analytical and experimental program was conducted to develop acoustic fatigue design criteria for aircraft structures subjected to intense noise in a high temperature environment. Equations for the dynamic response of a buckled panel were formulated for simply supported boundary conditions using large deflection plate theory. Random amplitude acoustic fatigue testing of representative aircraft structure was accomplished at temperatures up to 600 F to provide data for correlation with the analytical results. Empirical design criteria are presented in the form of design equations and nomographs for predicting the combined thermal and dynamic response of aircraft structures. (Author)
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