Article: An enhanced global-local higher-order theory for the free edge effect in laminates

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TitleAn enhanced global-local higher-order theory for the free edge effect in laminates
AuthorsLo, SH2
Zhen, W1
Cheung, YK2
Wanji, C1
KeywordsFree Edge Effects
Global-Local Higher Order Model
Laminated Composite Plates
Issue Date2007
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/compstruct
CitationComposite Structures, 2007, v. 81 n. 4, p. 499-510 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.compstruct.2006.09.013
AbstractAccording to the double-superposition hypothesis proposed by Li and Liu [Li XY, Liu D. Generalized laminate theories based on double superposition hypothesis. Int J Numer Methods Eng 1997;40:1197-212], an enhanced global-local higher-order theory (EGLHT-mn) is developed to analyze the edge-effect problems in laminates. The in-plane displacement field consists of mth-order (9 ≥ m ≥ 3) polynomial in global coordinate z along the thickness direction and order 3 power series in local coordinate ζ within each layer whereas the transverse deflection is represented by a nth-order (9 ≥ n ≥ 3) polynomial of global coordinate z. By imposing the free surface conditions and the geometric and the stress continuity conditions at interfaces, the number of variables of the higher-order theory is independent of the number of layers of the laminates. As an improvement to the global-local theory proposed by Li and Liu (1997), the present higher-order theory takes into account all the effects of shear and normal stresses. A three-node triangular element satisfying the requirement of C1 weak-continuity conditions between elements is also presented. Comparing to previous published results, it is found that the present higher-order theory is capable of treating free-edge problems in symmetric and unsymmetric laminates under extension, bending and thermal loading. Other characteristic of the present theory is that transverse shear stresses can be accurately computed directly from the constitutive equations without smoothing. However, to determine transverse normal stresses, the local equilibrium equation approach has to been adopted. © 2006 Elsevier Ltd. All rights reserved.
ISSN0263-8223
2011 Impact Factor: 2.24
2011 SCImago Journal Rankings: 0.083
DOIhttp://dx.doi.org/10.1016/j.compstruct.2006.09.013
ISI Accession Number IDWOS:000249256200004
ReferencesReferences in Scopus
DC Field
Value
dc.contributor.authorLo, SH
dc.contributor.authorZhen, W
dc.contributor.authorCheung, YK
dc.contributor.authorWanji, C
dc.date.accessioned2012-06-26T06:04:31Z
dc.date.available2012-06-26T06:04:31Z
dc.date.issued2007
dc.description.abstractAccording to the double-superposition hypothesis proposed by Li and Liu [Li XY, Liu D. Generalized laminate theories based on double superposition hypothesis. Int J Numer Methods Eng 1997;40:1197-212], an enhanced global-local higher-order theory (EGLHT-mn) is developed to analyze the edge-effect problems in laminates. The in-plane displacement field consists of mth-order (9 ≥ m ≥ 3) polynomial in global coordinate z along the thickness direction and order 3 power series in local coordinate ζ within each layer whereas the transverse deflection is represented by a nth-order (9 ≥ n ≥ 3) polynomial of global coordinate z. By imposing the free surface conditions and the geometric and the stress continuity conditions at interfaces, the number of variables of the higher-order theory is independent of the number of layers of the laminates. As an improvement to the global-local theory proposed by Li and Liu (1997), the present higher-order theory takes into account all the effects of shear and normal stresses. A three-node triangular element satisfying the requirement of C1 weak-continuity conditions between elements is also presented. Comparing to previous published results, it is found that the present higher-order theory is capable of treating free-edge problems in symmetric and unsymmetric laminates under extension, bending and thermal loading. Other characteristic of the present theory is that transverse shear stresses can be accurately computed directly from the constitutive equations without smoothing. However, to determine transverse normal stresses, the local equilibrium equation approach has to been adopted. © 2006 Elsevier Ltd. All rights reserved.
dc.description.natureLink_to_subscribed_fulltext
dc.identifier.citationComposite Structures, 2007, v. 81 n. 4, p. 499-510 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.compstruct.2006.09.013
dc.identifier.doihttp://dx.doi.org/10.1016/j.compstruct.2006.09.013
dc.identifier.epage510
dc.identifier.hkuros152299
dc.identifier.isiWOS:000249256200004
dc.identifier.issn0263-8223
2011 Impact Factor: 2.24
2011 SCImago Journal Rankings: 0.083
dc.identifier.issue4
dc.identifier.scopuseid_2-s2.0-34250771175
dc.identifier.spage499
dc.identifier.urihttp://hdl.handle.net/10722/150415
dc.identifier.volume81
dc.languageeng
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/compstruct
dc.publisher.placeUnited Kingdom
dc.relation.ispartofComposite Structures
dc.relation.referencesReferences in Scopus
dc.rightsComposite Structures. Copyright © Elsevier Ltd.
dc.subjectFree Edge Effects
dc.subjectGlobal-Local Higher Order Model
dc.subjectLaminated Composite Plates
dc.titleAn enhanced global-local higher-order theory for the free edge effect in laminates
dc.typeArticle
Author Affiliations
  1. Dalian University of Technology
  2. The University of Hong Kong