Sökning: "Crack propagation modeling"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden Crack propagation modeling.

  1. 1. Fracture simulation with a hyperelastic phase field model

    Master-uppsats, KTH/Hållfasthetslära

    Författare :Adrien Fradet; [2023]
    Nyckelord :Fracture; Phase field modeling; Hyperelasticity; Brott; fasfält-methoden; hyperelasticite;

    Sammanfattning : The phase field method is a versatile tool to study crack initiation and propagation in systems with complex geometries. Based on a variational formulation of the equilibrium equations, the sharp crack topology is regularized by a crack with diffusive edges and the damage is described by a continuous phase field variable. LÄS MER

  3. 2. Spricktillväxt i stålkonstruktioner på grund av utmattning

    Kandidat-uppsats, KTH/Byggteknik och design

    Författare :Kemal Abdelwahab; Abdirizag Farah Mohamed; [2019]
    Nyckelord :Steel Bridge; Fatigue; Stress Intensity Factors; Abaqus; Crack Propagation; Nominal Stresses; Stålbroar; Utmattning; Spänningsintensitetsfaktor; Abaqus; Sprickpropagering; Nominella spänningar;

    Sammanfattning : Stålbroars approximativa livslängd bestäms av stålets utmattningshållfasthet, då utmattning är en av de främsta anledningarna till att livslängden begränsas. I Sverige existerar ett antal broar som närmar sig slutet av sin livslängd, samtidigt som behovet för kapacitet och kraven på broarna ökar. LÄS MER

  4. 3. Failure Modeling of Curved Composite Beams : Numerical Modeling of Failure Onset and Propagation in L-Profile Beams

    Master-uppsats, KTH/Lättkonstruktioner

    Författare :Suhas Gururaj Shetty; [2018]
    Nyckelord :;

    Sammanfattning : The high strength/stiffness-to-weight ratio that composite materials exhibit has led to the utilization of composites as alternative to traditional materials in weight-critical applications. However, the highly anisotropic nature of composites renders the strength prediction under complex loading challenging. LÄS MER

  5. 4. Simulation of Delamination Migration in Laminated Composite Structures - An Approach Combining Extended Finite Elements and a Cohesive Zone Model

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Hållfasthetslära

    Författare :Viktor Björklund; [2018]
    Nyckelord :Crack propagation modeling; Fiber-reinforced polymer; Laminated composites; FRP; CFRP; Cohesive zone model; CZM; Delamination migration; FEM; XFEM; Fracture mechanics; Progressive damage modeling; Surface-based cohesive behaviour; Technology and Engineering;

    Sammanfattning : Fiber-reinforced polymer matrix composites are being used increasingly in lightweight applications where high strength and stiffness is required. One of the main challenges with designing components from such materials is to predict the ultimate strength and behaviour of the structure. LÄS MER

  7. 5. Prediction of fracture propagation in human femur using the Finite Element Method

    Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Frida Bengtsson; [2018]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Hip fractures constitute a major problem, both in terms of a lower life quality for the people affected and socio-economical factors. Osteoporosis is a medical condition, defined by decreased bone mass, which results in a more fragile bone structure and a higher risk for fractures. Osteoporosis accounts for a cost of € 1. LÄS MER