Sökning: "styrka"

Visar resultat 16 - 20 av 221 avhandlingar innehållade ordet styrka.

1. 16. In-plane mechanical properties of birch plywood and its performance in adhesively bonded connections

   Författare :Tianxiang Wang; Magnus Wålinder; Roberto Crocetti; Simon Aicher; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Birch plywood; in-plane mechanical properties; adhesively bonded connections; gusset plates; load-to-face grain angle; spreading angle; Björkplywood; mekaniska egenskaper i planet; limmade förband; belastningsvinkel relativt ytfanérens fiberriktning ; spridningsvinkel; Building Materials; Byggnadsmaterial;

   Sammanfattning : Birch (Betula spp.) is a hardwood species with a wide natural distribution on the Eurasian continent, especially in northern Europe. LÄS MER

3. 17. Characterisation of Time-dependent Statistical Failure of Fibre Networks : Applications for Light-weight Structural Composites

   Författare :Amanda Mattsson; Tetsu Uesaka; Christina Dahlström; Sören Östlund; Mittuniversitetet; []
   Nyckelord :;

   Sammanfattning : The future of a sustainable society requires that materials not only be renewable, but also leave as small a carbon foot-printin the environment as possible. One such product is light-weight composite material for transportation packages. Cellulose fibres have been and will continue to be ideal for this purpose. LÄS MER

4. 18. Cellulose Nanofibril Networks and Composites : Preparation, Structure and Properties

   Författare :Marielle Henriksson; Lars Berglund; Alain Dufresne; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cellulose nanocomposites; microfibrillated cellulose; nanofibrils; biofibers; mechanical properties; deformation mechanisms; molar mass; endoglucanase; Materials science; Teknisk materialvetenskap;

   Sammanfattning : Träbaserade cellulosananofibriller är intressanta som förstärkande fas i polymera nanokompositer; detta främst på grund av den kristallina cellulosans höga styvhet och på grund av nanofibrillernas förmåga att bilda nätverk. Cellulosananofibriller kan användas i form av mikrokristallin cellulosa, MCC, som har lågt längd/diameter förhållande, eller i form av mikrofibrillerad cellulosa, MFC, med högt längd/diameter förhållande. LÄS MER

5. 19. Essays on Panel Cointegration

   Författare :Joakim Westerlund; Nationalekonomiska institutionen; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Nationalekonomi; ekonometri; ekonomisk teori; ekonomiska system; ekonomisk politik; Cross-Sectional Dependence; Common factor restriction; Feldstein-Horioka Puzzle; Fisher Hypothesis; economic policy; economic theory; economic systems; Economics; econometrics; Structural Break.; Sieve Bootstrap; Information Criteria; Residual-Based Cointegration Test; Panel Cointegration; Monte Carlo Simulation; Model Selection; International R D Spillovers; International Health Care Expenditures;

   Sammanfattning : This thesis develops new techniques for analyzing cointegrated relationships in panel data. The first chapter is introductory while the remaining six contain the main contributions. LÄS MER

7. 20. Computational Materials Design of Medium Mn Steels

   Författare :Fei Huyan; Annika Borgenstam; Peter Hedström; Marcel Somers; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : Medium Mn steels (~ 3–10 mass % Mn), a new category of advanced high strength steels, attracted worldwide research interests recent years due to their excellent mechanical properties and low cost. These steels have fine microstructures and contain large fraction of metastable retained austenite (~ 30 volume %), therefore exhibit excellent strength and elongation. LÄS MER