Date of Award
Master of Science
Department of Aeronautics and Astronautics
Anthony N. Palazotto, PhD
This study investigated the frequency response of a cantilever beam with the intent of establishing a reliable nondestructive method of damage detection. The test specimens were 12 aluminum 2024 T3 beams, each identical except for a unique, eccentrically located notch, and one reference notchless beam. The machined notches varied in length and location to simulate varying degrees of damage. Laser doppler vibrometry enabled the data acquisition. The changes in natural frequencies were correlated to notch length and notch location. A comparison of eccentric and centered notch influence on the natural frequencies also is discussed.
DTIC Accession Number
Durham, Frances K., "Internal Damage Detection and Assessment in Beams Using Experimental Natural Frequencies" (2005). Theses and Dissertations. 3652.