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• W2071711000 endingPage "035014" @default.
• W2071711000 startingPage "035014" @default.
• W2071711000 abstract "Discrete dislocation dynamics (DD) approaches have proven useful in modeling the dynamics of large ensembles of dislocations. Continuing interest in finite body effects via image stresses has extended DD numerical approaches to improve the handling of surfaces. However, a physically accurate, yet computationally scalable, implementation has been elusive. This paper presents a new framework and implementation of a finite element-based discrete DD code that (1) treats arbitrarily shaped non-convex surfaces through image tractions, (2) allows for systematic refinement of the finite element mesh both in the bulk and on the surface and (3) provides a platform to scale to relatively larger and lengthier simulations. The approach is based on the capabilities of the Parallel Dislocation Simulator coupled through a distributed shared memory implementation for the calculation of large numbers of dislocation segments interacting with an independently large number of surface finite elements. Surface tracking approaches enable topological features at surfaces to be modeled. We verify the computed results via comparisons with analytical solutions for an infinite screw dislocation and prismatic loop near a surface and examine surface effects on a Frank–Read source. Convergence of the image force error with h- and p-refinement is shown to indicate the computational robustness. Additionally, through larger numerical experiments, we demonstrate the new capabilities in a three-dimensional elastic body of finite extent." @default.
• W2071711000 created "2016-06-24" @default.
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• W2071711000 date "2014-03-21" @default.
• W2071711000 modified "2023-10-11" @default.
• W2071711000 title "A multiply parallel implementation of finite element-based discrete dislocation dynamics for arbitrary geometries" @default.
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• W2071711000 doi "https://doi.org/10.1088/0965-0393/22/3/035014" @default.
• W2071711000 hasPublicationYear "2014" @default.
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