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Torsional vibrations of composite bars by BEM

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dc.contributor.author Sapountzakis, EJ en
dc.date.accessioned 2014-03-01T01:23:15Z
dc.date.available 2014-03-01T01:23:15Z
dc.date.issued 2005 en
dc.identifier.issn 0263-8223 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/16875
dc.subject Beam en
dc.subject Boundary element method en
dc.subject Composite bar en
dc.subject Dynamic analysis en
dc.subject Nonuniform torsion en
dc.subject Twist en
dc.subject Vibrations en
dc.subject Warping en
dc.subject.classification Materials Science, Composites en
dc.subject.other Boundary conditions en
dc.subject.other Boundary element method en
dc.subject.other Boundary value problems en
dc.subject.other Elastic moduli en
dc.subject.other Elasticity en
dc.subject.other Problem solving en
dc.subject.other Tubes (components) en
dc.subject.other Vibrations (mechanical) en
dc.subject.other Composite bars en
dc.subject.other Cross sections en
dc.subject.other Torsional vibrations en
dc.subject.other Warping en
dc.subject.other Composite structures en
dc.subject.other composite property en
dc.title Torsional vibrations of composite bars by BEM en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.compstruct.2004.08.031 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.compstruct.2004.08.031 en
heal.language English en
heal.publicationDate 2005 en
heal.abstract In this paper a boundary element method is developed for the nonuniform torsional vibration problem of doubly symmetric composite bars of arbitrary constant cross-section. The composite bar consists of materials in contact, each of which can surround a finite number of inclusions. The materials have different elasticity and shear moduli and are firmly bonded together. The beam is subjected to an arbitrarily distributed dynamic twisting moment, while its edges are restrained by the most general linear torsional boundary conditions. A distributed mass model system is employed which leads to the formulation of three boundary value problems with respect to the variable along the beam angle of twist and to the primary and secondary warping functions. These problems are solved employing a pure BEM approach that is only boundary discretization is used. Both free and forced torsional vibrations are considered and numerical examples are presented to illustrate the method and demonstrate its efficiency and accuracy. The discrepancy in the analysis of a thin-walled cross-section composite beam employing the BEM after calculating the torsion and warping constants adopting the thin tube theory demonstrates the importance of the proposed procedure even in thin-walled beams, since it approximates better the torsion and warping constants and takes also into account the warping of the walls of the cross-section. (c) 2004 Elsevier Ltd. All rights reserved. en
heal.publisher ELSEVIER SCI LTD en
heal.journalName Composite Structures en
dc.identifier.doi 10.1016/j.compstruct.2004.08.031 en
dc.identifier.isi ISI:000231110900009 en
dc.identifier.volume 70 en
dc.identifier.issue 2 en
dc.identifier.spage 229 en
dc.identifier.epage 239 en


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