CRACK DETECTION IN BARS WITH LONGITUDINAL CRACK USING VIBRATION MEASURING TECHNIQUE
M., B., M., M., A., S. (2006). CRACK DETECTION IN BARS WITH LONGITUDINAL CRACK USING VIBRATION MEASURING TECHNIQUE. EKB Journal Management System, 12(12th International Conference on Applied Mechanics and Mechanical Engineering.), 697-717. doi: 10.21608/amme.2006.41684
Bennaya M.; Mahgoub H. M.; Sherif H. A.. "CRACK DETECTION IN BARS WITH LONGITUDINAL CRACK USING VIBRATION MEASURING TECHNIQUE". EKB Journal Management System, 12, 12th International Conference on Applied Mechanics and Mechanical Engineering., 2006, 697-717. doi: 10.21608/amme.2006.41684
M., B., M., M., A., S. (2006). 'CRACK DETECTION IN BARS WITH LONGITUDINAL CRACK USING VIBRATION MEASURING TECHNIQUE', EKB Journal Management System, 12(12th International Conference on Applied Mechanics and Mechanical Engineering.), pp. 697-717. doi: 10.21608/amme.2006.41684
M., B., M., M., A., S. CRACK DETECTION IN BARS WITH LONGITUDINAL CRACK USING VIBRATION MEASURING TECHNIQUE. EKB Journal Management System, 2006; 12(12th International Conference on Applied Mechanics and Mechanical Engineering.): 697-717. doi: 10.21608/amme.2006.41684

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, Page 697-717  XML PDF (602.39 K)
Document Type: Original Article
DOI: 10.21608/amme.2006.41684
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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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