Paper Title:
Damping Performance of Cocured Composite I-Shaped Beams with Embedded Viscoelastic Layers
  Abstract

Composite I-shaped beams are currently used in aerospace, ocean and civil engineering applications. Increasing the vibration damping of composite structures is a concerned need in those applications. This research is an effort to investigate the damping performance of composite I-shaped beams with cocured viscoelastic damping layers using finite element method and modal testing technique. A hybrid finite element model for a damped composite I-shaped beam was developed. Modal strain energy method was used to estimate the linear viscoelastic modal loss factors of the composite beams. A numerical parametric investigation was conducted to study the effects of various parameters on the dynamic properties of composite beams under free-free end boundary condition. Selective design parameters included inserting location and thickness of damping layers. Natural frequency and modal loss factor were also extracted by experimental modal analysis. Static tests were performed to obtain the loss of static stiffness for inserting soft viscoelastic layers. Experimental and analytical results show the inserting location of cocured damping layers has significant effects on the damping and there exists a critical damping layer thickness for optimal damping with less significant modal frequency decrease. Static tests results demonstrate a little loss of static stiffness for embedding low module damping layers. A careful selection of damping layer location and thickness is needed to optimize the damping benefits desirable and the mechanics stiffness reduction that can be tolerated for intergral damping composite structures.

  Info
Periodical
Advanced Materials Research (Volumes 79-82)
Edited by
Yansheng Yin and Xin Wang
Pages
1859-1862
DOI
10.4028/www.scientific.net/AMR.79-82.1859
Citation
C. Xu, S. Lin, "Damping Performance of Cocured Composite I-Shaped Beams with Embedded Viscoelastic Layers ", Advanced Materials Research, Vols. 79-82, pp. 1859-1862, 2009
Online since
August 2009
Authors
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Khalid El Bikri, El Bekkaye Merrimi, Rhali Benamar
Chapter 7: Building Materials
Abstract:The purpose of the present paper is to show that the problem of geometrically non linear free vibration of symmetrically and asymmetrically...
1681
Authors: Rajagopal Ramesh, Siddharth Balasubramanian, Chinnasamy Senthamaraikannan
Chapter 5: Research and Design of Industrial Equipments and Machines
Abstract:Carbon fibers find their application in lightweight structures due to high strength to weight ratio. Passive damping is proving important for...
1042