Sökning: "Elastic-plastic"

Visar resultat 1 - 5 av 24 uppsatser innehållade ordet Elastic-plastic.

  1. 1. Validation of An Iteration Free Material Model for Paperboard (NEO)

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Hållfasthetslära; Lunds universitet/Institutionen för byggvetenskaper

    Författare :Samuel Thomas Staines; [2022]
    Nyckelord :Paperboard; orthotropic; Constitutive equilibrium free; Non-linear; Curve fit constitutive relation; switch-wise history dependence; total formulation; explicit constitutive relation; In-plane; Elastic-plastic; Technology and Engineering;

    Sammanfattning : The NEO model, developed by Lindström (2019) for paperboard, is a non-linear material model that utilizes empirically based constitutive relations with switches to mimic elastic-plastic responses. Due to the explicit definition of the constitutive relations, the NEO model does not require a constitutive equilibrium loop. LÄS MER

  3. 2. Investigation of case hardened steel subjected to torsion: An experimental and numerical elastic-plastic material study

    Master-uppsats, KTH/Hållfasthetslära

    Författare :Jonathan Fridstrand; [2022]
    Nyckelord :Torsion; Shear stress-strain relation; Elastoplastic material; Case hardened steel; Custom material model; Vridning; Skjuvtöjning och -spänning; Elastiskt-plastiskt material; Sätthärdat stål; Anpassad materialmodell;

    Sammanfattning : There is currently a knowledge gap regarding the plastic material properties of many steel types that Atlas Copco use in their high torque power tools. This makes it difficult to fully utilise the capabilities of the Finite Element Method (FEM) to aid the developmental process. LÄS MER

  4. 3. In-plane bi-axial testing of thin paper

    Master-uppsats, KTH/Hållfasthetslära

    Författare :Asad Ali; Danay Michael; [2022]
    Nyckelord :;

    Sammanfattning : During its lifetime, a beverage package is subjected to a complex loading history where the loading, in general, is multiaxial. Hence, to optimize the performance of the package, knowledge of the material’s anisotropic multi-axial deformation and subsequent failure is necessary. LÄS MER

  5. 4. Strain rate-dependent mechanical properties of high-density polyethylene(HDPE)

    Uppsats för yrkesexamina på avancerad nivå, Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Författare :Oscar Andersson; Alexander Wiklund; [2022]
    Nyckelord :HDPE; strain rate; DIC; inverse calibration; Abaqus; HDPE; töjningshastighet; DIC; Inverskalibrering; Abaqus;

    Sammanfattning : In today’s packaging industry HDPE is widely used and correct understanding of itsproperties and how to model them is of vital importance. HDPE is a semi-crystallinepolymer with a known strain rate dependence, that is a higher yield and lower strainto failure at higher strain rates. LÄS MER

  7. 5. Tensile strength reduction for insufficient thread engagement A FEM study of a wall-shoe assembly

    Master-uppsats, KTH/Hållfasthetslära

    Författare :Henrik Larsson Sevon; [2021]
    Nyckelord :Solid Mechanics; Tensile strength; Wall-shoe; Thread engagement; Hållfasthetslära; Draghållfasthet; Väggsko; Gängingrepp;

    Sammanfattning : The purpose of this master thesis is to determine whether or not it exist, a model that can describethe reduction in strength, due to missing threads in a bond between a bolt and nut. And how thereduction in strength might effect a wall-shoe assembly, used to connect a wall to another wall or aconcrete base plate. LÄS MER