Abstract
The coupling effect of vibration and fatigue crack propagation for a cracked cantilever beam is studied in this paper. The dynamic characteristics and fracture mechanics parameters are calculated by using 2D 8-nodes elements in FEM code. The nonlinear dynamic behavior of breathing crack is described by a frictionless contact FEM model. Linear fracture mechanics theory is used to calculate the stress intensity factor. At resonant state, coupling effect is significant between vibration and crack propagation. The response of beam under harmonic excitation is extremely sensitive to the structure natural frequency decrease which is caused by crack length growth. An approach of sweeping crack length analysis is proposed in resonant response evaluation of cracked beam. Two numerical tests are calculated to investigate coupling effects at resonant state: crack arrest problem and crack unstable propagation problem.
Publisher
Trans Tech Publications, Ltd.
Reference12 articles.
1. Chondros T. G., Dimarogonas A. D., Yao J.: A continuous cracked beam vibration theory [J]. Journal of Sound and Vibration, 215(1): 17-24 (1998).
2. Chondros T. G., Dimarogonas A. D., Yao J.: Vibration of a beam with a breathing crack [J]. Journal of Sound and Vibration, 239(1): 57-67 (2001).
3. Cheng S M, Wu X J, Wallace W: Vibrational response of a beam with a breathing crack [J] . Journal of Sound and Vibration, 225(1): 201-208 (1999).
4. Zhong Z. Y.: Coupling Analysis of vibration and fatigue crack growth of a four-bar mechanism. Chung Yuan Christian University, Master thesis. (2002).
5. Chen S. Z.: Coupling Analysis of vibration and fatigue crack growth for a crank-slider Mechanism. Chung Yuan Christian University, Master thesis. (2003).
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