Sökning: "non-linear loads"

Visar resultat 6 - 10 av 64 avhandlingar innehållade orden non-linear loads.

1. 6. Fibre-reinforced Concrete for Industrial Construction - a fracture mechanics approach to material testing and structural analysis

   Författare :Ingemar Lövgren; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; in-situ cast; non-linear; self-compacting; fibre-reinforced; concrete;

   Sammanfattning : ABSTRACTMore efficient and industrialised construction methods are both necessary for thecompetitiveness of in-situ concrete and essential if the construction industry is to moveforward. At present, the expenditure on labour (preparation and dismantling offormwork, reinforcing, and casting and finishing of concrete) almost equals the cost ofmaterial. LÄS MER

3. 7. Numerical stress analysis in hybrid adhesive joint with non-linear materials

   Författare :Nawres Al-Ramahi; Roberts Joffe; Janis Varna; Rickard Östlund; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymeric Composite Materials; Polymera kompositmaterial;

   Sammanfattning : This thesis presents systematic numerical study of stresses in the adhesive of a single-lap joint subjected to various loading scenarios (mechanical and thermal loading). The main objective of this work is to improve understanding of the main material and geometrical parameters determining performance of adhesive joint for the future analysis of failure initiation and development in these structures. LÄS MER

4. 8. Non-linear behaviour of polymer composites, moisture effects and accelerated testing

   Författare :Peter Mannberg; Anders Sjögren; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymera konstruktionsmaterial; Polymeric Composite Materials;

   Sammanfattning : The society of today is moving fast and the demands on almost everything are getting higher and higher. This can also be seen in the field of material science, where lightweight, high performance materials are gaining increased interest in order to be able to develop for example high performing vehicles with low fuel consumption or wind turbines with higher efficiency. LÄS MER

5. 9. Electrical Systems for Wave Energy Conversion

   Författare :Cecilia Boström; Mats Leijon; Daniel Karlsson; Uppsala universitet; []
   Nyckelord :Wave power; direct driven linear generators; electrical systems; non-linear loads; TECHNOLOGY; TEKNIKVETENSKAP; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

   Sammanfattning : Wave energy is a renewable energy source with a large potential to contribute to the world's electricity production. There exist several technologies on how to convert the energy in the ocean waves into electric energy. The wave energy converter (WEC) presented in this thesis is based on a linear synchronous generator. LÄS MER

7. 10. Simulation of Irregular Waves and Wave Induced Loads on Wind Power Plants in Shallow Water

   Författare :Jenny Trumars; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wave load; Non-linear wave models; ocean engineering; wind energy converter; perturbation theory; shallow water;

   Sammanfattning : The essay gives a short introduction to waves and discusses the problem with non-linear waves in shallow water and how they effect an offshore wind energy converter. The focus is on the realisation of non-linear waves in the time domain from short-term statistics in the form of a variance density spectrum of the wave elevation. LÄS MER