Sökning: "Non-linear elasticity"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Non-linear elasticity.

  1. 1. Experimental and numerical analysis of orthotropic deformations of wood using Finite Strain Theory (large deformations) and the Finite Element Method (FEM) in 2D

    Master-uppsats, Linnéuniversitetet/Institutionen för byggteknik (BY)

    Författare :Honghao Ren; [2021]
    Nyckelord :Orthotropic material; Largedeformation; Two-dimension; Non-linear elasticity;

    Sammanfattning : This thesis involves the derivation of a constitutive model under large deformationtheory using Updated Lagrange method applied on an orthotropic material.Thefollowing aspects are included in this thesis work: introduction, theory, FEM implementation, derivation of constitutive model, calibration, result, discussion, conclusion and the future work. LÄS MER

  3. 2. Stability of building structures using NLFEA including second order effects : Applications with the software ATENA-GiD

    Master-uppsats, KTH/Betongbyggnad

    Författare :Alexandros Petkoglou; [2021]
    Nyckelord :Non-linear analysis; second order effects; prefabricated buildings; ATENA; GiD; slip connection; Icke-linjär analys; andra ordnings effekter; förtillverkade byggnader; prefabricerade byggnader; ATENA; GiD; glidkoppling;

    Sammanfattning : In Sweden, prefabrication in the construction industry is a very common system. In prefabricated structures, there are various kinds of connections and generally many hinged connections. Therefore, it is of high interest to study the behavior of the prefabricated buildings in relation to the connections. LÄS MER

  4. 3. Material Characterization for the Simulation of Drop Tests Against PMMA Sheets

    Master-uppsats, Jönköping University/JTH, Material och tillverkning

    Författare :Arturo Sancho Montagut; [2020]
    Nyckelord :Abaqus; Polymers; PMMA; Acrylic; Simulation; Material Models; Hyperelasticity; Plasticity; Viscoelasticity; Drucker Prager; Yeoh; Drop Test; Luminaires;

    Sammanfattning : There is a high demand for implementing simulations in the design and product devel-opment processes, avoiding the execution of costly tests on prototypes and giving thechance of discarding unsuitable designs, as well as exploring possible ones without much cost added.This project assignment is to find a suitable way to simulate drop tests on two typesof PMMA sheets, a material widely used on luminaire covers. LÄS MER

  5. 4. Negative energy elasticity and a model for the behavior of the residual strain in doubly cross-linked gels fabricated by shear strain

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Polymerkemi

    Författare :Therese You; [2020]
    Nyckelord :Polymer gel; Tetra-PEG; hydrogels; doubly cross-linked gels; shear modulus; energy elasticity;

    Sammanfattning : Doubly cross-linked gels were fabricated based on tetra-poly(ethylene glycol) (Tetra-PEG) by shear strain. These are gels with two network structures present in the same polymeric network. The second network structure is introduced by applying a mechanical field to the first natural network structure. LÄS MER

  7. 5. The Hanging Rope: A Convex Optimization Problem in the Calculus of Variations

    Master-uppsats, Lunds universitet/Matematik LTH

    Författare :Erik Steen; [2020]
    Nyckelord :Elasticity theory; non-linear materials; calculus of variation; convex analysis; Legendre transform; Mathematics and Statistics;

    Sammanfattning : We study the problem first introduced by Verma and Keller in 1984 of how to taper a heavy rope such that its elongation is minimized. The problem is stated as an optimization problem of a functional J[w]. Specifically we provide a proof of optimality for the solution using traditional convex optimization techniques. LÄS MER