1511. Propagation characteristics and identification of type I cracks by the extended finite element method combined with modal analysis

• Published in: Journal of Vibroengineering pp. 261 - 274
• Main Authors: Huang, Dong-Yan, Li, Shi-Jun, Zhu, Long-Tu, Wang, Zeng-Hui
• Format: Journal Article
• Language: English
• Published: JVE International Ltd 01.02.2015
• Subjects: Finite element method; Vibration
• ISSN: 1392-8716

Extended finite element frame based on Abaqus is applied to research the crack propagation problem of two-dimensional long rectangular thin plate. Presuppose type I crack with different horizontal locations and longitudinal dimensions, the propagation characteristics of the edge crack is discussed with the objects of structural flexibility of the thin plate, crack propagation length and plastic zone of crack tip etc. The results indicate that the horizontal location of the initial crack has a small influence on the crack propagation characteristics, and it only affects the local flexibility of the thin plate as well as the dimension and shape of plastic zone of crack tip. The longitudinal dimension of the initial crack obviously nonlinear influence on various parameters of the crack propagation characteristics. In view of the disastrous consequence of crack propagation, the vibration characteristics of the thin plate with different crack dimensions and crack locations are discussed based on the experiment and simulation modal analysis on the thin plate, thus providing basis for prior estimation and control for crack generation and propagation.