A hybrid local/non-local framework for the simulation of damage and fracture

  • Yan Azdoud

Student thesis: Doctoral Thesis

Abstract

Recent advances in non-local continuum models, notably peridynamics, have spurred a paradigm shift in solid mechanics simulation by allowing accurate mathematical representation of singularities and discontinuities. This doctoral work attempts to extend the use of this theory to a community more familiar with local continuum models. In this communication, a coupling strategy - the morphing method -, which bridges local and non-local models, is presented. This thesis employs the morphing method to ease use of the non-local model to represent problems with failure-induced discontinuities. First, we give a quick review of strategies for the simulation of discrete degradation, and suggest a hybrid local/non-local alternative. Second, we present the technical concepts involved in the morphing method and evaluate the quality of the coupling. Third, we develop a numerical tool for the simulation of the hybrid model for fracture and damage and demonstrate its capabilities on numerical model examples
Date of AwardJan 2014
Original languageEnglish (US)
Awarding Institution
  • Physical Science and Engineering
SupervisorGilles Lubineau (Supervisor)

Keywords

  • Peridynamics
  • Non-Local Continuum
  • Coupling Methods
  • Fracture Mechanics
  • Damage Mechanics
  • Computational Mechanics

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