Analysis of Mode and Vibration Fatigue Life of Beam with Multiple Cracks
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所属单位：航空学院
发表刊物：Zhendong Ceshi Yu Zhenduan
摘要：An analytical method is proposed to predict the fatigue life of the beam with multiple cracks based on the Paris equation. In the modal analysis process, the segment of cracks is replaced with bending springs, a new method for solving natural modes of the beam with multiple cracks is proposed based on the transfer matrix method, and the effect of the number, locations and depths of cracks on the natural frequency of the cracked beam is analyzed. In the vibration fatigue analysis, the effect of the number of cracks on the crack-tip stress intensity factor under harmonic excitation is analyzed. Considering the interaction of cracked beam vibration and fatigue crack growth, the effect of the number and the location of the cracks on the cracked beam fatigue life is analyzed based on timing analysis and Paris equation. The results indicate that the number, locations and depths of cracks have important effects on the modal parameters and the fatigue life of the structure. © 2017, Editorial Department of JVMD. All right reserved.
ISSN号：1004-6801
是否译文：否
发表时间：2017-04-01
合写作者：Ma, Yijiang
通讯作者：陈国平