Document Type
Thesis
Degree
Master of Science
Department
Mechanical Engineering
Advisor's Name
Ibrahim Tansel
Advisor's Title
Committee chair
Advisor's Name
Igor Tsukanov
Advisor's Name
Sabri Tosunoglu
Keywords
Structural Health Monitoring, non-destructive evaluation, lamb waves, sweep sine wave, structural defects, piezoelectric elements, frequency response, damage detection
Date of Defense
11-10-2010
Abstract
Structural Health Monitoring (SHM) techniques are widely used in a number of Non – destructive Evaluation (NDE) applications. There is a need to develop effective techniques for SHM, so that the safety and integrity of the structures can be improved. Two most widely used SHM methods for plates and rods use either the spectrum of the impedances or monitor the propagation of lamb waves. Piezoelectric wafer – active sensors (PWAS) were used for excitation and sensing. In this study, surface response to excitation (SuRE) and Lamb wave propagation was monitored to estimate the integrity of the round objects including the pipes, tubes and cutting tools. SuRE obtained the frequency response by applying sweep sine wave to surface. The envelope of the received signal was used to detect the arrival of lamb waves to the sensor. Both approaches detect the structural defects of the pipes and tubes and the wear of the cutting tool.
Recommended Citation
Singh, Gurjashan, "Health Monitoring of Round Objects using Multiple Structural Health Monitoring Techniques" (2010). FIU Electronic Theses and Dissertations. Paper 330.
http://digitalcommons.fiu.edu/etd/330