Finite element modeling of the effects of delamination damage on the natural frequencies of composite panels

被引：0
作者：
Deshmukh, P.V. [1 ]
Wosu, S.N. [1 ]
Daniel, L. [2 ]
机构：
[1] Department of Mechanical Engineering, 323 Benedum Hall, University of Pittsburgh, Pittsburgh
[2] Kanmas Research and Consulting, Inc., Gibsonia, PA 15044
来源：
Journal of ASTM International | 2008年 / 5卷 / 05期
关键词：
Cohesive zone; Composite; Damage detection; Delamination; Finite element method; Fracture; Modal analysis;
D O I：
10.1520/JAI101156
中图分类号：
学科分类号：
摘要：
This paper describes the analysis and experimental effort undertaken to determine damage detection in composite beams. Finite element analysis of delamination and its effect on the natural frequencies of the composite beam is determined using cohesive zone elements of a commercial finite element software material model ANSYS. Numerical simulations are carried out to analyze typical cases of a delaminated composite beam with different boundary conditions. It is found that an increase in the delaminated region ratio increases the percent deviation in the natural system frequencies. The amount of deviation was different for different types of delamination. The frequency charts of the present study may be useful for engineering design and non-destructive testing analysis. It can be used as a tool for diagnosis, detection, and identification of delaminations in engineering applications by monitoring the frequency change. Copyright © 2008 by ASTM International.
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