MICRO/MACROMECHANICAL PLASTIC LIMIT ANALYSES OF COMPOSITE MATERIALS AND STRUCTURES-中国期刊网

摘要 Theload-bearingcapacitiesofduclilecompositematerialsandstructuresarestudiedbymeansofacombinedmicro/macromechanicsapproach.Firstly,onthemicroscopicscale,theaimistogetthemacroscopicstrengthdomainsbymeansofthehomogenizationtheoryofmicromechanics.Arepresentativevolumeelement(RVE)isselectedtoreflectthemicrostructuresofthecompositematerials.Byintroducingthehomogenizationtheoryintothekinematiclimittheoremofplasticlimitanalysis,anoptimizationformaltodirectlycalculatethelimitloadsoftheRVEisobtained.Andthemacroscopicyieldcriterioncanbedeter-minedaccordingtotherelationbetweenmacroscopicandmicroscopicfields.Secondly,onthemacroscopicscale,byintroducingtheHill’syieldcriterionintothekinematiclimittheorem,thelimitloadsoforthotropicstructuressuchasunidirectionalfiber-reinforcedcompositestructuresareworkedout.Thefiniteelementmodelingofthekinematiclimitanalysisisdeducedintoanonlinearmathematicalprogrammingwithequality-constraintconditionsthatcanbesolvedbymeansofadirectiterativealgorithm.Finally,someexamplesareillustratedtoshowtheapplicationofthepresentapproach.

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MICRO/MACROMECHANICAL PLASTIC LIMIT ANALYSES OF COMPOSITE MATERIALS AND STRUCTURES

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MICRO/MACROMECHANICAL PLASTIC LIMIT ANALYSES OF COMPOSITE MATERIALS AND STRUCTURES

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