News Column

New Findings from University of Western Sydney Update Understanding of Composite Materials

June 3, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Investigators discuss new findings in Composite Materials. According to news reporting originating from Penrith, Australia, by VerticalNews correspondents, research stated, "This paper investigates the large amplitude vibration behavior of nanocomposite cylindrical panels resting on elastic foundations in thermal environments. Two kinds of carbon nanotube-reinforced composite (CNTRC) panels, namely, uniformly distributed and functionally graded reinforcements, are considered."

Our news editors obtained a quote from the research from the University of Western Sydney, "The material properties of FG-CNTRC panels are assumed to be graded in the thickness direction, and are estimated through a micromechanical model. The motion equations are based on a higher-order shear deformation theory with a von Karman-type of kinematic nonlinearity. The panel-foundation interaction and thermal effects are also included and the material properties of CNTRCs are assumed to be temperature-dependent. The equations of motion are solved by a two-step perturbation technique to determine the nonlinear frequencies of the CNTRC panels. Numerical results demonstrate that the natural frequencies of the CNTRC panels are reduced but the nonlinear to linear frequency ratios of the CNTRC panels are increased as the temperature rises. In contrast, natural frequencies are increased but the nonlinear to linear frequency ratios are decreased by increasing the foundation stiffness."

According to the news editors, the research concluded: "The results reveal that the natural frequencies are increased by increasing the CNT volume fraction, whereas the CNTRC panels with intermediate CNT volume fraction do not necessarily have intermediate nonlinear to linear frequency ratios."

For more information on this research see: Nonlinear vibration of nanotube-reinforced composite cylindrical panels resting on elastic foundations in thermal environments. Composite Structures, 2014;111():291-300. Composite Structures can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier -; Composite Structures -

The news editors report that additional information may be obtained by contacting H.S. Shen, University of Western Sydney, Sch Comp Engn & Math, Penrith, NSW 2751, Australia.

Keywords for this news article include: Penrith, Composite Materials, Australia and New Zealand

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Source: Journal of Technology