Sökning: "The Combined Effects of Moisture and Temperature"

Visar resultat 1 - 5 av 17 avhandlingar innehållade orden The Combined Effects of Moisture and Temperature.

1. 1. Development of Finite Element Models for 3-D Forming Processes of Paper and Paperboard

   Författare :Eric Linvill; Sören Östlund; Johan Tryding; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 3-D forming; constitutive model; moisture; temperature; hydroforming; deep drawing; 3-D formning; finitaelement; konstitutiv modell; fukt; temperatur; hydroformning; djup dragning; Hållfasthetslära; Solid Mechanics;

   Sammanfattning : Paper materials have a long history of use in packaging products, although traditional paper-based packaging is limited in its shape and design. In order to enable more advanced paper-based packaging, various 3-D forming processes for paper materials have been studied. LÄS MER

3. 2. 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

4. 3. Applied Modeling of Moisture Phenomena in Concrete

   Författare :Marcin Stelmarczyk; Andrzej Cwirzen; Hans Hedlund; Klaas van Breugel; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Concrete; Modeling degree of hydration; Modeling chemically bounded water; Modeling moisture sorption; Modeling moisture transport; Hysteresis; Byggmaterial; Building Materials;

   Sammanfattning : This thesis contains new and improved calculation models, based on applied research merging numerical modeling and material research, in the areas of hydration and chemical binding of water, sorption of moisture and transport of moisture in concrete. The proposed model for hydration and chemical binding of water is based on general kinetics modeling and calculates degree of hydration directly, without using of equivalent time of maturity. LÄS MER

5. 4. Modelling of temperature, moisture and stresses in young concrete

   Författare :Jan-Erik Jonasson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

   Sammanfattning : The present study consists of three areas, namely modelling of- (1) temperature, (2) moisture state, and (3) stresses in young concrete. The derivation of models, examination of material data, and development of computer programs have progressed differently in these areas. LÄS MER

7. 5. Heat and water flows in freezing and thawing soils : numerical modelling, laboratory and field observations

   Författare :Helén Engelmark; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Vattenteknik; Water Resources Engineering;

   Sammanfattning : A laboratory study of infiltration rates into frozen and unfrozen fine sand, including temperature effects of both soil and infiltration water, is reported. The average infiltration rate varied from about 10.6 mm/min for unfrozen conditions, to about 1-2 mm/min for frozen conditions. LÄS MER