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http://dx.doi.org/10.5139/JKSAS.2003.31.1.018

Vibration Analysis of Pretwisted Composite Plates with Embedded Viscoelastic Core using Zig-Zag Triangular Finite Element  

Lee,Deok-Gyu (한국항공우주연구원 위성운영센터)
Jo,Maeng-Hyo (서울대학교 기계항공공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.31, no.1, 2003 , pp. 18-24 More about this Journal
Abstract
A three node triangular element with drilling rotations incorporating improved higher-order zig-zag theory(HZZT) is developed to analyze the vibration of pretwisted composite plates with embedded damping layer. Shear force matching conditions are enforced along the interfaces between the embedded damping patch and the border patch by matching the shear forces of the embedded damping patch to the shear forces of the adjacent border patch. The natural frequencies and modal loss factors are calculated for cantilevered pretwisted composite blade with damping core with the present triangular element, and compared to experiments and MSC/NASTRAN using a layered combination of plate and solid elements.
Keywords
Damping; zig-Zag Theory; Triangular Element; Loss Factor;
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