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Structural Design And Analysis Of A Rigidizable Space Shuttle Experiment, Raymond G. Holstein Iii
Structural Design And Analysis Of A Rigidizable Space Shuttle Experiment, Raymond G. Holstein Iii
Theses and Dissertations
AFIT is in the process of designing a Space Shuttle experiment designated as the Rigidized Inflatable Get-Away-Special Experiment (RIGEX) to study the effects of microgravity on the deployment of rigidizable composite structures. Once in space, the experiment will inflate and rigidize three composite structures and perform a vibration analysis on each by exciting the tubes using piezoelectric patches and collecting data via an accelerometer. This paper presents the structural and vibration analysis of the RIGEX assembly and inflatable composite tubes using ABAQUS Finite Element Analysis (FEA) software. Comparison of the analysis has been carried out with Eigenvalue/Eigenvector experimentation by means …
Vibrometric Detection Of Beam Damage Due To Inclusions, Aaron J. Reifsnyder
Vibrometric Detection Of Beam Damage Due To Inclusions, Aaron J. Reifsnyder
Theses and Dissertations
The Air Force Institute of Technology, in conjunction with the Structural Health Monitoring branch of the Air Force Research Laboratory, is researching methods of determining effects of notch location and size on beam structures using modal frequency analysis. This thesis explores the ability to detect included notches of varying magnitudes and locations within the frequency domain of an isotropic cantilever beam. A series of experiments employing centerline-notched 2024 T3 and 2024 0 aluminum beams was used to determine whether natural frequency measurement in beam structures is a valid mechanism for damage detection. Each specimen was excited by a strain actuator …