Polimer matrisli kompozitlerin pim ile yük taşıma özelliklerinin incelenmesi

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Thesis Type: Doctorate

Institution Of The Thesis: Kocaeli University, Fen Bilimleri Enstitüsü, Makina Mühendisliği Bölümü, Turkey

Approval Date: 2006

Thesis Language: Turkish

Student: TANER YILMAZ

Supervisor: Tamer Sınmazçelik

Open Archive Collection: AVESIS Open Access Collection

Abstract:

LOAD BEARING PROPERTIES OF PIN CONNECTED POLYMERCOMPOSITESTaner YILMAZKey words: Polymer Composites, Pinned Connections, Dynamic Loading,Mechanical Properties, Environmental Effects, DMTA.Abstract: In this study, load bearing properties of pin connected polymer compositeshaving different fiber orientations and polymer matrices, have been investigated.Effects of joint geometry on load bearing capacity have been investigated. Inaddition to the fiber type, fiber orientation, and type of the polymer matrices, effectsof the parameters related with joint geometry are investigated for load bearingperformance of the pin connected composites. Load bearing capacities and changesin failure formation mechanisms related to variations in geometric parameters areinvestigated.Not only at static loading conditions, but also the failure mechanisms at dynamicloading conditions have been investigated.On the other hand, load carrying capacities of pin connected polymer matrixcomposites after they are exposed to different environmental conditions such asthermal cycles in water bath, and in different chemical baths such as strong acids orstrong bases have been investigated. Variations in load carrying and failuremechanisms of polymer composites, especially at fiber/matrix interface, when thecomposite material is exposed to conditions that worsen the fiber/matrix interfacehave been investigated. Changes in interlaminar shear strength and viscoelasticproperties of fiber/matrix interface have been investigated by DMTA (DynamicThermal Mechanical Analysis) and experiments. Obtained results have been used torelate changes in material properties to load bearing performance of multilayeredpolymer composites under this type of loading conditions.