Sökning: "Nominal stress"

Visar resultat 11 - 15 av 21 uppsatser innehållade orden Nominal stress.

  1. 11. A digital image correlation method for detection of fatigue cracks in non-load carrying T-joints

    Master-uppsats, KTH/Lättkonstruktioner

    Författare :Björn Jonsson; [2018]
    Nyckelord :;

    Sammanfattning : In dynamical loaded welded structures fatigue life is often a limiting factor. Common practise is to reduce nominal stress by increased material thickness which leads to oversized, heavy structures. Those practises are replaced by improvement of production and designingtechniques to utilize better properties of high strength steels. LÄS MER

  3. 12. Fatigue Life Analysis of Weld Ends : Using FE-Calculations and Mechanical Testing

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

    Författare :Victor Ljungdahl; [2018]
    Nyckelord :Comparison; Effective notch method; Testing; Weld End; Jämförelse; Effective notch metoden; Provning; Svetslut;

    Sammanfattning : Fatigue life estimation of welds is a complex issue since the characteristics of each weld are unique depending on load case, geometry and properties. Fatigue life estimation on weld ends is limited and often the weakest point of a weld. LÄS MER

  4. 13. Improved lifetime of a rubber spring in an articulated hauler through product development

    Magister-uppsats, Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Författare :Pontus Nilsson; Jan Tordsson; [2017]
    Nyckelord :Rubber spring; elastomer; principal stretch; nominal stress; maximum surface stress; lifetime;

    Sammanfattning : Dampening systems are important in heavy vehicles utilized in rough terrains, with purpose to reduce shocks and vibrations with negative influences on the vehicle and, more importantly, on the operator of the vehicle. During the years the heavy vehicles require sturdier construction parts, due to demands on higher load capacity, where the easy solution to scale up the construction parts is not always applicable for dampening systems with nonlinear behavior. LÄS MER

  5. 14. A fatigue investigation in a Kaplan hydropower station operated in frequency regulating mode

    Master-uppsats, KTH/Energiteknik

    Författare :Aron Tapper; [2016]
    Nyckelord :;

    Sammanfattning : Due to the increase of intermittent power in the Nordic grid the need for frequency regulation increases. Hydropower has the ability to respond fast to frequency changes in the grid and is the power source mainly used to regulate the frequency in the Nordic grid. LÄS MER

  7. 15. Second-order FE Analysis of Axial Loaded Concrete Members According to Eurocode 2

    Master-uppsats, KTH/Betongbyggnad

    Författare :Nessa Yosef Nezhad Arya; [2015]
    Nyckelord :Second-order; nonlinear; slender reinforced concrete column; ABAQUS; FE analysis; curvature method; nominal stiffness method; eccentrically loaded; benchmark experiment; parametric study; Andra ordningens effekt; icke-linjär; slank armerad betongpelare; ABAQUS; FE-modellering; krökningsmetoden; styvhetsmetoden; excentrisk last; utvärderingsförsök; parameterstudie;

    Sammanfattning : A nonlinear finite element analysis was performed for an axial loaded reinforced concrete column subjected to biaxial bending taking into account second-order effects. According to Eurocode there are two ways to take second-order effects into consideration: nonlinear FE analysis and hand calculation based on the simplified methods explained in Eurocode 2. LÄS MER