This Article Full Text (PDF) All Versions of this Article: 0021998309345334v1 43/24/2943    most recent References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Scopus Google Scholar Articles by Kiral, Z. Articles by Kiral, B. G. Social Bookmarking                         What's this?

Experimental Investigation of the Dynamic Response of a Symmetric Laminated Composite Beam Via Laser Vibrometry

Faculty of Engineering, Department of Mechanical Engineering Dokuz Eylül University 35100, Bornova-Izmir, Turkey, zeki.kiral{at}deu.edu.tr

Levent Malgaca

Faculty of Engineering, Department of Mechanical Engineering Dokuz Eylül University 35100, Bornova-Izmir, Turkey

Murat Akdag

Faculty of Engineering, Department of Mechanical Engineering Dokuz Eylül University 35100, Bornova-Izmir, Turkey

Binnur Goren Kiral

Faculty of Engineering, Department of Mechanical Engineering Dokuz Eylül University 35100, Bornova-Izmir, Turkey

This article reports the experimental analysis of free and forced vibrations of a cantilever symmetric laminated composite beam with different lay-up sequences. The free vibrations generated due to initial displacements are recorded by two laser displacement sensors. The damping ratios for different ply orientations are determined by using the ratios between the successive peaks in the free vibration responses and the corresponding envelope curves. The dynamic response of the beam to a moving load with constant velocity is also investigated. The pressured air is blown out onto the beam to create the load and the movement of the load is achieved by an industrial robot manipulator. The moving load mechanism is peculiar to this study. The free and moving load responses are also examined by the finite element method. A commercial finite element package ANSYS^® is used for numerical analyses. The results reported in this study show that the lay-up sequence has an important role on the dynamic response of the laminated composites and the velocity of the moving load affects the dynamic response considerably, especially for [90]_2s lay-up.

Key Words: laminated composite beam • moving load • dynamic response • damping ratio • laser vibrometry.

This version was published on November 1, 2009

Journal of Composite Materials, Vol. 43, No. 24, 2943-2962 (2009)
DOI: 10.1177/0021998309345334


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?