Sökning: "mechano-sorptive creep"

Visar resultat 1 - 5 av 11 avhandlingar innehållade orden mechano-sorptive creep.

  1. 1. Mechano-sorptive Creep in Wood - Experimental Studies of the Influence of Material Properties

    Författare :Charlotte Bengtsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; material properties; deformation; shrinkage swelling; mechano-sorption; dynamic modulus of elasticity; creep;

    Sammanfattning : Mechano-sorptive creep deformations appear when wood is loaded under varying moisture conditions. These creep deformations are known to be larger than the creep deformations under constant humidity conditions. The present thesis deals with mechano-sorptive creep in Norway spruce wood. LÄS MER

  3. 2. Micro-mechanical modelling of mechano-sorptive creep in paper

    Författare :Johan Alfthan; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  4. 3. Micro-mechanically based modeling of mechano-sorptive creep in paper

    Författare :Johan Alfthan; Peter Gudmundson; Staffan Toll; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; applied mechanics; materials science; packaging; Materialvetenskap; Materials science; Teknisk materialvetenskap;

    Sammanfattning : The creep of paper is accelerated by moisture content changes. This acceleration is known as mechano-sorptive creep, which is also found in wood and some other materials. Mechano-sorptive creep has been known for several decades but it is still not well understood, and there is no generally accepted model explaining the effect. LÄS MER

  5. 4. Micro-mechanical mechanisms for deformation in polymer-material structures

    Författare :Jessica Strömbro; Peter Gudmundson; Per Gradin; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Length-scale effects; Strain gradient; Moisture change; Humidity change; Network model; Fibre model; Mathematical model; Polymer; Micro-indentation; Particle composite; Interfacial debonding; Matrix cracking; Paper; Mechano-sorptive creep; Accelerated creep; Other materials science; Övrig teknisk materialvetenskap;

    Sammanfattning : In this thesis, the focus has been on micro-mechanical mechanisms in polymer-based materials and structures. The first part of the thesis treats length-scale effects on polymer materials. Experiments have showed that the smaller the specimen, the stronger is the material. LÄS MER

  7. 5. Strategies for improving kraftliner pulp properties

    Författare :Stefan Antonsson; Mikael E. Lindström; Gunnar Henriksson; Mats Johansson; Hans Theliander; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lignin; xylan; kraftliner pulp; mechano-sorptive creep; hygroexpansion; stiffness; fibre shape; fibre width; lignin; xylan; kraftlinermassa; mekanosorptivt kryp; hygroexpansion; styvhet; fiberform; fiberbredd; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Sammanfattning : A large part of the world paper manufacturing consists of production of corrugated board components, kraftliner and fluting, that are used in many different types of corrugated boxes. Because these boxes are stored and transported, they are often subjected to changes in relative humidity. LÄS MER