CRACK DETECTION IN BARS WITH LONGITUDINAL CRACK USING VIBRATION MEASURING TECHNIQUE | ||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||
| Article 16, Volume 12, 12th International Conference on Applied Mechanics and Mechanical Engineering., May 2006, Pages 697-717 PDF (602.39 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/amme.2006.41684 | ||
| Authors | ||
| Bennaya M.1; Mahgoub H. M.1; Sherif H. A.2 | ||
| 1Egyptian Armed Forces. | ||
| 2Higher Institute of Technology-10th of Ramadan. | ||
| Abstract | ||
| ABSTRACT In this paper the dynamic behavior of a cylindrical bar with longitudinal crack as a new case of crack geometry is investigated. The bar is bounded and excited in way which permits only torsional vibration of the bar. This work is based on crack induced by the manufacturing processes not due to applied load. The dynamic analysis of the cracked bar is based on the investigation of the measured transient response in time and frequency domains beside its modal parameters. Experiments are carried out in two different specimens of the bar providing that their mechanical properties and dimension are kept identical. The first specimen of the bar is uncracked while the second one has a longitudinal crack along its whole length. The bar is excited with its first torsional mode and the measured signals are analyzed using (FFT) analysis. A finite element model has been made using ANSYS software to simulate the uncracked bar. Modal, transient and harmonic analysis are made to validate the experimental work. The finite element prediction of the dynamic response and the fundamental natural frequency were in good agreement with the experimental results. This work suggests a simple method for crack detection in beams. | ||
| Keywords | ||
| Crack Detection; torsional dynamic response; cracked bar | ||
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