Search for dissertations about: "Mechanical buckling"

Showing result 1 - 5 of 35 swedish dissertations containing the words Mechanical buckling.

  1. 1. Vibration Frequencies as Status Indicators for Tensegrity Structures

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Nasseradeen Ashwear; KTH.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tensegrity; Pre-stress; Vibration; Health monitoring; Buckling; Temperature effect; Vibration health monitoring VHM; Tensegritet; Förspänning; Vibration; Hälsokontroll; Knäckning; Temperatureffekt; Vibrationsbaserad hälsokontroll; Teknisk mekanik; Engineering Mechanics;

    Abstract :  Applications of vibration structural health monitoring (VHM) techniques are increasing rapidly. This is because of the advances in sensors and instrumentation during the last decades. VHM uses the vibration properties to evaluate many civil structures during the design steps, building steps and service life. READ MORE

  2. 2. Weakening of Crack-tip Singularity due to Buckling of Thin Bodies under Tension

    University dissertation from LTH, Lund University

    Author : Li Chong; Cong Li; Lund University.; Lunds universitet.; Malmö University.; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thin foils; Fracture; Buckling; Technology;

    Abstract : When thin sheets containing a crack is subjected to tensile loading in the direction perpendicular to the crack surface out of plane displacement will occur in areas surrounding the crack. By this the stress state in the vicinity of the crack tip is changed and leads to a weaker crack tip singularity than the r-1/2 by linear elastic fracture mechanics. READ MORE

  3. 3. Mechanical behaviour of carbon nanostructures

    University dissertation from Karlstad : Karlstads universitet

    Author : Henrik Jackman; Karlstads universitet.; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; carbon nanotubes; CNT; multiwalled carbon nanotubes; MWCNT; rippling; buckling; mechanical properties; transmission electron microscopy; TEM; scanning electron microscopy; SEM; atomic force microscopy; AFM; Young’s modulus; in situ TEM; in situ SEM; Physics; Fysik;

    Abstract : AbstractCarbon nanotubes (CNTs) have extraordinary mechanical and electrical properties. Together with their small dimensions and low density, they are attractive candidates for building blocks in future nanoelectromechanical systems and for many other applications. READ MORE

  4. 4. Basic Testing and Strength Design of Corrugated Board and Containers

    University dissertation from Karlstad : Karlstads universitet

    Author : Tomas Nordstrand; Lund University.; Lunds universitet.; [2003]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material technology; Materiallära; materialteknik; Produktteknik allmän ; Technology of other products; corrugation; compression; collapse; buckling; bending; box;

    Abstract : Packaging serves a lot of purposes, and would be hard to do without. Packaging protects the goods during transport, saves costs, informs about the product, and extends its durability. A transport package is required to be strong and lightweight in order to be cost effective. READ MORE

  5. 5. Simulation of dynamic instabilities during high rate deformation of ductile bars and plates

    University dissertation from Division of Mechanics, Lund University

    Author : Kristina Nilsson; Lund University.; Lunds universitet.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; numerical simulation; non-linear; wave propagation; multiple necking; necking; buckling; fracture; Mechanical engineering; Maskinteknik; finite elements; cohesive elements; dynamic; J2-flow theory; J2-deformation theory; viscoplastic; background inertia;

    Abstract : In this thesis, some of the phenomena occurring in plates and cylindrical bars subjected to dynamic loading are investigated. Numerical simulations using a dynamic finite element code are performed for a number of different sized specimens with various initial surface imperfections. Typically imposed loading velocities are in the range 10m/s.. READ MORE