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

TitleAn enhanced global-local higher-order theory for the free edge effect in laminates
Authors
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
Citation
Composite Structures, 2007, v. 81 n. 4, p. 499-510 How to Cite?
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.
Persistent Identifierhttp://hdl.handle.net/10722/150415
ISSN
2015 Impact Factor: 3.853
2015 SCImago Journal Rankings: 2.408
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLo, SHen_US
dc.contributor.authorZhen, Wen_US
dc.contributor.authorCheung, YKen_US
dc.contributor.authorWanji, Cen_US
dc.date.accessioned2012-06-26T06:04:31Z-
dc.date.available2012-06-26T06:04:31Z-
dc.date.issued2007en_US
dc.identifier.citationComposite Structures, 2007, v. 81 n. 4, p. 499-510en_US
dc.identifier.issn0263-8223en_US
dc.identifier.urihttp://hdl.handle.net/10722/150415-
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.en_US
dc.languageengen_US
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/compstructen_US
dc.relation.ispartofComposite Structuresen_US
dc.rightsComposite Structures. Copyright © Elsevier Ltd.-
dc.subjectFree Edge Effectsen_US
dc.subjectGlobal-Local Higher Order Modelen_US
dc.subjectLaminated Composite Platesen_US
dc.titleAn enhanced global-local higher-order theory for the free edge effect in laminatesen_US
dc.typeArticleen_US
dc.identifier.emailLo, SH:hreclsh@hkucc.hku.hken_US
dc.identifier.emailCheung, YK:hreccyk@hkucc.hku.hken_US
dc.identifier.authorityLo, SH=rp00223en_US
dc.identifier.authorityCheung, YK=rp00104en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.compstruct.2006.09.013en_US
dc.identifier.scopuseid_2-s2.0-34250771175en_US
dc.identifier.hkuros152299-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34250771175&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume81en_US
dc.identifier.issue4en_US
dc.identifier.spage499en_US
dc.identifier.epage510en_US
dc.identifier.isiWOS:000249256200004-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridLo, SH=7401542444en_US
dc.identifier.scopusauthoridZhen, W=11638893400en_US
dc.identifier.scopusauthoridCheung, YK=7202111065en_US
dc.identifier.scopusauthoridWanji, C=6701386210en_US

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