[asim99]

Thermal buckling and postbuckling of laminated composite beams with temperature-dependent properties

Author: A.R. Vosoughi,n, P.Malekzadeh, Ma.R.Banan, Mo.R.Banan | Size: 345 KB | Format: PDF | Quality: Unspecified | Publisher: Sciencedirect/Elsevier | Year: 2012 | pages: 7

The thermalbucklingandpostbucklinganalysisoflaminatedcompositebeamswithtemperature-
dependentmaterialpropertiesispresented.Thegoverningequationsarebasedonthefirst-ordershear
deformationbeamtheory(FSDT)andthegeometricalnonlinearityismodeledusingGreen’sstrain
tensor inconjunctionwiththevonKarmanassumptions.Thedifferentialquadraturemethod(DQM)as
an accurate,simpleandcomputationallyefficientnumericaltoolisadoptedtodiscretizethegoverning
equationsandtherelatedboundaryconditions.Adirectiterativemethodisemployedtoobtainthe
criticaltemperature(bifurcationpoint)aswellasthenonlinearequilibriumpath(thepostbuckling
behavior)ofsymmetricallylaminatedbeams.Theapplicability,rapidrateofconvergenceandhigh
accuracy ofthemethodareestablishedviadifferentexamplesandbycomparingtheresultswiththose
of existinginliterature.Then,theeffectsoftemperaturedependenceofthematerialproperties,
boundaryconditions,length-to-thicknessratios,numberoflayersandplyangleonthethermal
bucklingandpostbucklingcharacteristicofsymmetricallylaminatedbeamsareinvestigated.

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