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Experimental Study on Crack Detection of Clamped-clamped Beams  

Son, In-Soo (Department of mechanical Engineering, Dong-eui Univ.)
Ahn, Sung-Jin (Department of mechanical Maintenance, Busan HRD, KCCI)
Yoon, Han-Ik (Department of mechanical Engineering, Dong-eui Univ.)
Publication Information
Journal of the Korean Society for Precision Engineering / v.27, no.6, 2010 , pp. 47-54 More about this Journal
Abstract
In this paper, the purpose is to study a method for detection of crack in clamped-clamped beams using the vibration characteristics. The natural frequency of beam is obtained by FEM and experiment. The governing differential equations of a Timoshenko beam are derived via Hamilton's principle. The two coupled governing differential equations are reduced to one fourth order ordinary differential equation in terms of the flexural displacement. The crack is assumed to be in the first mode of fracture and to be always opened during the vibrations. The differences between the actual and predicted crack positions and sizes are less than 9.8% and 28%, respectively.
Keywords
Crack Detection; Natural Frequency; Open Crack; Non-destructive Testing; Ultrasonic Testing;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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