Sökning: "Physical fracture propagation model"

Hittade 2 uppsatser innehållade orden Physical fracture propagation model.

1. 1. An Attempt Towards FE-Modelling of Fracture Propagation in Railway Wheels

   Master-uppsats, KTH/Spårfordon

   Författare :Fred Öhnander; [2018]
   Nyckelord :Railway wheel; Wheel-rail contact; Wear; Fracture initiation; Physical fracture propagation model; FE-model; Fracture mechanics; XFEM; Inclusion; Järnvägshjul; Hjul-räl-kontakt; Slitage; Sprickinitiering; Fysisk sprickbildningsmodell; FE-modell; Frakturmekanik; XFEM; Imperfektion;

   Sammanfattning : The demand for higher velocities and heavier axle loads for freight trains leads to higher forces on the railway wheels which in turn lead to an increase in stresses on and below the surface of the wheel-rail contact. By time, this induces wear on the wheels which consequently lead to higher maintenance costs and in some cases accidents. LÄS MER

3. 2. Sharp Edge Cutting through Paperboard

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Hållfasthetslära

   Författare :Daniel Jern; August Leek; [2017]
   Nyckelord :Slitting; Cutting; Fracture mechanics; Fracture modelling; Crack propagation modelling; Paperboard modelling; Technology and Engineering;

   Sammanfattning : The aim of this thesis is to investigate the micro mechanical damage and the failure of paperboard during sharp edge cutting. Tetra Pak is at the very forefront of the food packaging industry and in order to keep this market position, continuous improvements are of great importance. LÄS MER