Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/105889
Title: Free vibration of exponential functionally graded beams with single delamination
Authors: Xiao, Jing
Shu, Dongwei
Liu, Yang
Keywords: DRNTU::Engineering::Mechanical engineering::Machine design and construction
Issue Date: 2014
Source: Liu, Y., Xiao, J., & Shu, D. (2014). Free vibration of exponential functionally graded beams with single delamination. Procedia engineering, 75, 164-168.
Series/Report no.: Procedia Engineering
Conference: International Conference on Materials for Advanced Technologies (ICMAT2013), Symposium W - Advanced Structural and Functional Materials for Protection
Abstract: FGMs are regarded as one of the most promising candidates for future advanced composites in many engineering sectors, but they may suffer the problem of delamination. Delaminations in structures may significantly reduce the stiffness and strength of the structure and may affect their vibration characteristics. In the present study, an analytical solution is developed to study the free vibration of exponential functionally graded beams with a single delamination. Kirchhoff-Love hypothesis, the ‘free mode’ and ‘constrained mode’ assumption in delamination vibration are adopted. The shifting of neutral axis due to asymmetrical distribution of material property (in thickness direction) is also taken into consideration. This is the first study on the influences of delamination (its length and location) on the vibration of exponential functionally graded beams. Results show that the natural frequency increases as the Young's modulus ratio increases, but such increase is smaller when the beam suffers a longer delamination. Furthermore, the effect of delamination length and longitudinal location on reducing natural frequency is aggravated when the material property (Young's modulus and density) changes less dramatically from the bottom to the top. The difference of natural frequency between ‘free mode’ and ‘constrained mode’ becomes smaller with a decreasing Young's modulus ratio. The analytical results of this study can serve as the benchmark for FEM and other numerical solutions.
URI: https://hdl.handle.net/10356/105889
http://hdl.handle.net/10220/20961
ISSN: 18777058
DOI: 10.1016/j.proeng.2013.11.041
Schools: School of Mechanical and Aerospace Engineering 
Rights: © 2013 The Authors. Published by Elsevier Ltd. This paper was published in Procedia Engineering and is made available as an electronic reprint (preprint) with permission of Elsevier Ltd. The paper can be found at the following official DOI: [http://dx.doi.org/10.1016/j.proeng.2013.11.041]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Conference Papers

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