Vibration and Buckling Characteristics of Functionally Graded Graphene Nanoplatelets Reinforced Composite Beams with Open Edge Cracks

This paper investigates the free vibration and compressive buckling characteristics of functionally graded graphene nanoplatelets reinforced composite (FG-GPLRC) beams containing open edge cracks by using the finite element method. The beam is a multilayer structure where the weight fraction of grap...

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Main Authors: Meifung Tam, Zhicheng Yang, Shaoyu Zhao, Jie Yang
Format: Article
Language:English
Published: MDPI AG 2019-04-01
Series:Materials
Subjects:
Online Access:https://www.mdpi.com/1996-1944/12/9/1412
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spelling doaj-831248a7ea2f48d3af044a634b6fd9d42020-11-25T01:19:21ZengMDPI AGMaterials1996-19442019-04-01129141210.3390/ma12091412ma12091412Vibration and Buckling Characteristics of Functionally Graded Graphene Nanoplatelets Reinforced Composite Beams with Open Edge CracksMeifung Tam0Zhicheng Yang1Shaoyu Zhao2Jie Yang3School of Engineering, RMIT University, PO Box 71, Bundoora, VIC 3083, AustraliaSchool of Engineering, RMIT University, PO Box 71, Bundoora, VIC 3083, AustraliaSchool of Civil Engineering, the University of Queensland, St Lucia, Brisbane, QLD 4072, AustraliaSchool of Engineering, RMIT University, PO Box 71, Bundoora, VIC 3083, AustraliaThis paper investigates the free vibration and compressive buckling characteristics of functionally graded graphene nanoplatelets reinforced composite (FG-GPLRC) beams containing open edge cracks by using the finite element method. The beam is a multilayer structure where the weight fraction of graphene nanoplatelets (GPLs) remains constant in each layer but varies along the thickness direction. The effective Young’s modulus of each GPLRC layer is determined by the modified Halpin-Tsai micromechanics model while its Poisson’s ratio and mass density are predicted according to the rule of mixture. The effects of GPLs distribution pattern, weight fraction, geometry, crack depth ratio (CDR), slenderness ratio as well as boundary conditions on the fundamental frequency and critical buckling load of the FG-GPLRC beam are studied in detail. It was found that distributing more GPLs on the top and bottom surfaces of the cracked FG-GPLRC beam provides the best reinforcing effect for improved vibrational and buckling performance. The fundamental frequency and critical buckling load are also considerably affected by the geometry and dimension of GPL nanofillers.https://www.mdpi.com/1996-1944/12/9/1412graphene nanoplateletsfunctionally graded nanocompositesfree vibrationbucklingedge crack
collection DOAJ
language English
format Article
sources DOAJ
author Meifung Tam
Zhicheng Yang
Shaoyu Zhao
Jie Yang
spellingShingle Meifung Tam
Zhicheng Yang
Shaoyu Zhao
Jie Yang
Vibration and Buckling Characteristics of Functionally Graded Graphene Nanoplatelets Reinforced Composite Beams with Open Edge Cracks
Materials
graphene nanoplatelets
functionally graded nanocomposites
free vibration
buckling
edge crack
author_facet Meifung Tam
Zhicheng Yang
Shaoyu Zhao
Jie Yang
author_sort Meifung Tam
title Vibration and Buckling Characteristics of Functionally Graded Graphene Nanoplatelets Reinforced Composite Beams with Open Edge Cracks
title_short Vibration and Buckling Characteristics of Functionally Graded Graphene Nanoplatelets Reinforced Composite Beams with Open Edge Cracks
title_full Vibration and Buckling Characteristics of Functionally Graded Graphene Nanoplatelets Reinforced Composite Beams with Open Edge Cracks
title_fullStr Vibration and Buckling Characteristics of Functionally Graded Graphene Nanoplatelets Reinforced Composite Beams with Open Edge Cracks
title_full_unstemmed Vibration and Buckling Characteristics of Functionally Graded Graphene Nanoplatelets Reinforced Composite Beams with Open Edge Cracks
title_sort vibration and buckling characteristics of functionally graded graphene nanoplatelets reinforced composite beams with open edge cracks
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2019-04-01
description This paper investigates the free vibration and compressive buckling characteristics of functionally graded graphene nanoplatelets reinforced composite (FG-GPLRC) beams containing open edge cracks by using the finite element method. The beam is a multilayer structure where the weight fraction of graphene nanoplatelets (GPLs) remains constant in each layer but varies along the thickness direction. The effective Young’s modulus of each GPLRC layer is determined by the modified Halpin-Tsai micromechanics model while its Poisson’s ratio and mass density are predicted according to the rule of mixture. The effects of GPLs distribution pattern, weight fraction, geometry, crack depth ratio (CDR), slenderness ratio as well as boundary conditions on the fundamental frequency and critical buckling load of the FG-GPLRC beam are studied in detail. It was found that distributing more GPLs on the top and bottom surfaces of the cracked FG-GPLRC beam provides the best reinforcing effect for improved vibrational and buckling performance. The fundamental frequency and critical buckling load are also considerably affected by the geometry and dimension of GPL nanofillers.
topic graphene nanoplatelets
functionally graded nanocomposites
free vibration
buckling
edge crack
url https://www.mdpi.com/1996-1944/12/9/1412
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AT shaoyuzhao vibrationandbucklingcharacteristicsoffunctionallygradedgraphenenanoplateletsreinforcedcompositebeamswithopenedgecracks
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