Search for dissertations about: "matrix and interface effects"

Showing result 1 - 5 of 47 swedish dissertations containing the words matrix and interface effects.

2. 1. Modelling and simulation of plastic deformation on small scales : interface conditions and size effects of thin films

   Author : Per Fredriksson; Peter Gudmundson; Christian Niordson; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strain gradient plasticity; Size effects; Thin films; Interface; Finite element method; Dislocations; Constitutive behaviour; Hardening behaviour; Indentation; Contact mechanics; Metal matrix composites; Engineering mechanics; Teknisk mekanik;

   Abstract : Contrary to elastic deformation, plastic deformation of crystalline materials, such as metals, is size-dependent. Most commonly, this phenomenon is present but unnoticed, such as the effect of microstructural length scales. READ MORE

4. 2. Nanostructured Cellulose Biocomposites : Effects from dispersion, network and interface

   Author : Mohd Farhan Ansari; Lars Berglund; Jean-Francois Gerard; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wood; cellulose nanofibrils; hygromechanical properties; network structure; thermoset; polymer matrix composites; natural fiber composites; pulp fiber; strain hardening; humidity; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Abstract : The major load bearing component in native wood, cellulose nanofibrils, are potential candidates for use as reinforcement in polymer matrices. This study is based on nanocellulose composites and attempts to prepare and characterize biocomposites with high nanocellulose content and investigate the influence of nanostructure on macroscopic properties. READ MORE

5. 3. Matrix and interface effects on microcracking in polymer composites

   Author : Anders Sjögren; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymera konstruktionsmaterial; Polymeric Composite Materials;

   Abstract : An underlying industrial problem for the present work is leakage of pressure vessels. Fluid leakage was confirmed to take place along a path of connected microcracks and delaminations. The thesis is concerned with the micromechanisms for microcracking studied by in-situ optical microscopy of cross-ply laminates. READ MORE

6. 4. Influence of microstructure on debonding at the fiber/matrix interface in fiber-reinforced polymers under tensile loading

   Author : Luca Di Stasio; Janis Varna; Zoubir Ayadi; Alberto Barroso; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fiber matrix interface; Debonding; Polymer-Matrix Composites PMC ; Finite Element Method FEM ; Linear Elastic Fracture Mechanics LEFM ; Polymeric Composite Materials; Polymera kompositmaterial;

   Abstract : At the end of the second decade of the XXI century, the transportation industry at large faces several challenges that will shape its evolution in the next decade and beyond. The first such challenge is the increasing public awareness and governmental action on climate change, which are increasing the pressure on the industrial sectors responsible for the greatest share of emissions, the transportation industry being one of them, to reduce their environmental footprint. READ MORE

7. 5. Wood-fibre composites : Stress transfer and hygroexpansion

   Author : Karin M. Almgren; Kristofer Gamstedt; Véronique Michaud; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cellulose and paper engineering; Cellulosa- och pappersteknik;

   Abstract : Wood fibres is a type of natural fibres suitable for composite applications. The abundance of wood in Swedish forests makes wood-fibre composites a new and interesting application for the Swedish pulp and paper industry. READ MORE