The morphing method as a flexible tool for adaptive local/non-local simulation of static fracture
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We introduce a framework that adapts local and non-local continuum models to simulate static fracture problems. Non-local models based on the peridynamic theory are promising for the simulation of fracture, as they allow discontinuities in the displacement field. However, they remain computationally expensive. As an alternative, we develop an adaptive coupling technique based on the morphing method to restrict the non-local model adaptively during the evolution of the fracture. The rest of the structure is described by local continuum mechanics. We conduct all simulations in three dimensions, using the relevant discretization scheme in each domain, i.e., the discontinuous Galerkin finite element method in the peridynamic domain and the continuous finite element method in the local continuum mechanics domain.
KeywordsNon-local elasticity Coupling Peridynamics Static fracture DGFEM Anisotropy Morphing
The authors gratefully acknowledge the financial support received from KAUST baseline and the Boeing Company for the completion of this work.
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