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Evaluation Techniques for Determining Damping Mechanisms on Titanium Plates60,99 €![Factors Contributing to Failure to Achieve National and NATO Objectives in Kosovo]( "Factors Contributing to Failure to Achieve National and NATO Objectives in Kosovo")
Factors Contributing to Failure to Achieve National and NATO Objectives in Kosovo60,99 €![An Historical Analysis of Factors Contributing to the Emergence of the Intrusion Detection Discipline and Its Role in Information Assurance]( "An Historical Analysis of Factors Contributing to the Emergence of the Intrusion Detection Discipline and Its Role in Information Assurance")
An Historical Analysis of Factors Contributing to the Emergence of the Intrusion Detection Discipline and Its Role in Information Assurance60,99 €![An Evaluation of U.S. Air Force Aviation Fuel Consumption Factors to Accurately Predict Aviation Fuel Costs by Aircraft Mission, Design, and Series]( "An Evaluation of U.S. Air Force Aviation Fuel Consumption Factors to Accurately Predict Aviation Fuel Costs by Aircraft Mission, Design, and Series")
An Evaluation of U.S. Air Force Aviation Fuel Consumption Factors to Accurately Predict Aviation Fuel Costs by Aircraft Mission, Design, and Series60,99 €![An Evaluation of the Factors Used to Predict Writing Ability at the Air Force Institute of Technology]( "An Evaluation of the Factors Used to Predict Writing Ability at the Air Force Institute of Technology")
An Evaluation of the Factors Used to Predict Writing Ability at the Air Force Institute of Technology60,99 €![Steady State Stress in a Coated Infinite Half-Space Subjected to a Moving Load]( "Steady State Stress in a Coated Infinite Half-Space Subjected to a Moving Load")
Steady State Stress in a Coated Infinite Half-Space Subjected to a Moving Load60,99 €![The Development of a Finite Element Program to Model High Cycle Fatigue in Isotropic Plates]( "The Development of a Finite Element Program to Model High Cycle Fatigue in Isotropic Plates")
The Development of a Finite Element Program to Model High Cycle Fatigue in Isotropic Plates60,99 €
High Cycle Fatigue (HCF) is the leading cause of component failure in gas turbine engines today, which poses great risk to aircraft, engines, and their crews. Mitigation of HCF effects has become a priority topic, and the damping benefits of hard coatings are being reevaluated for this purpose. Research was conducted to further understanding of damping measurements on these coatings. This study continues work to characterize the damping effects of a magnesium aluminate spinel (mag spinel) coating applied to a titanium plate via vibration testing. Two different plate sizes were evaluated in a clamped-free-free-free condition and a freefree- free-free condition, respectively. In both the clamped and free studies, the second bending and two-stripe mode shapes were identified and studied. Clamped specimens were tested in order to determine various factors affecting damping. Using these factors, it was shown that air damping has a statistically significant impact on damping, where the impact is dependent on mode shape. The amount of damping introduced by the air was, however, minute compared to the losses introduced by the constraint blocks. Testing on free condition specimens explored another possible method to obtain a damping comparison between coated and uncoated samples with fewer damping losses.