Sökning: "dynamic yield surface"

Visar resultat 1 - 5 av 32 avhandlingar innehållade orden dynamic yield surface.

  1. 1. Fiber-Supported Hydrogels with Controlled surface Properties

    Författare :Jan Karlsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cellulose; fiber; ozone; polypropylene; graft polymerization; hydrogel; surface;

    Sammanfattning : Hydrogels are emerging materials that have the ability to hold a substantial amount of water. However, the low mechanical performance of hydrogels is often a limitation for extending the field of applications. LÄS MER

  3. 2. Surface defects in rails - Potential influence of operational parameters on squat initiation

    Författare :Robin Andersson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; RCF; squats; dynamic vehicle–track interaction; rail corrugation; Rail surface irregularities;

    Sammanfattning : Despite significant efforts throughout the last decades, the mechanisms behind the formation of squats — a form of rolling contact fatigue (RCF) damage in rails — are not fully understood. Proposed causes of initiation involve, but are not limited to, small initial rail surface irregularities which yield high contact stresses, rail corrugation and varying friction conditions. LÄS MER

  4. 3. Modelling of Inelastic Effects in Metal Sheets and Identification of Material Parameters

    Författare :Edin Omerspahic; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; plasticity; viscoplasticity; MCR mechanism; constitutive modelling; mixed hardening; damage; dynamic yield surface; material parameter identification;

    Sammanfattning : The continuum modelling of the macroscopic behaviour of metallic sheets and the identification of corresponding material parameters for models selected are dealt with in the thesis. Thermodynamics with internal variables provides a framework for the derivation of the models. LÄS MER

  5. 4. Dynamic Equations foe Spherical and Cylindrical Shells Using Power Series Method

    Författare :Reza Okhovat; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; power series.; surface differential operators; shell equations; eigenfrequency; anisotropy; Spherical shell; cylindrical shell; dynamics;

    Sammanfattning : Shells are commonly used in many branches of engineeringand have therefore beeninvestigated for a number of different types of shells.A shell can be considered as a curved plate having small thickness compared to the other geometrical dimensions as well as to the wavelengths of importance. LÄS MER

  7. 5. High strength paper from high yield pulps by means of hot-pressing

    Författare :Tove Joelsson; Per Engstrand; Gunilla Pettersson; Anna Svedberg; Samuel Schabel; Mittuniversitetet; []
    Nyckelord :high yield pulp; hot-pressing; lignin; paper properties; wet strength;

    Sammanfattning : AbstractHigh Yield Pulp (HYP), i.e. TMP, SGW or CTMP, is normally used in printing papers (News, SC and LWC) or in a middle layer on cardboard i.e. LÄS MER