XOM ? Sandia/DOE Programs/Projects Overview
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Jump to search filtersImproving Power and Performance in HPC Networks
Abstract not provided.
A Summary Of Modeling and Simulation Assessments Techniques 2016
Abstract not provided.
Peridynamic Multiscale Finite Element Methods
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Fabrictaion of Counted Donor Devices using Top-Down Ion Implantation
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Validation Simulations of the DSMC Code SPARTA
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Aspects of Large-scale Fully-coupled AMG Preconditioned FE Magnetohydrodynamic Simulations Enabled Through Trilinos
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Krylov-Subspace Recycling via the POD-Augmented Conjugate Gradient Method
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Physical Limits of Computing
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Exploratory Trajectory Classification
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Energy Efficiency Limits of Logic and Memory
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Enabling fast, stable and accurate peridynamic computations using multi-time-step integration
Computer Methods in Applied Mechanics and Engineering
Peridynamics is a nonlocal extension of classical continuum mechanics that is well-suited for solving problems with discontinuities such as cracks. This paper extends the peridynamic formulation to decompose a problem domain into a number of smaller overlapping subdomains and to enable the use of different time steps in different subdomains. This approach allows regions of interest to be isolated and solved at a small time step for increased accuracy while the rest of the problem domain can be solved at a larger time step for greater computational efficiency. Performance of the proposed method in terms of stability, accuracy, and computational cost is examined and several numerical examples are presented to corroborate the findings.
Resistive Memory Device Requirements for a Neural Algorithm Accelerator
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Semantic Graphs for Pattern Detection in Sensor Data from Monitoring Regimes
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Cooperative Computing for Autonomous Data Centers Storing Social Network Data
Block Preconditioners for Mixed Discretization MHD and Continuum Plasma Simulations Enabled by Teko
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Toward optimizing multi-qubit device design and operation
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A COUPLING STRATEGY FOR LOCAL AND NONLOCAL MODELS with applications to static peridynamics
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Spiking Network Algorithms for Scientific Computing
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SDAV Progress Report (2016-06)
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Slycat Analysis and Visualization
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The Advanced Architecture Test Bed Project Past Future and Impacts
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Emerging Technologies for the Acceleration of Neuromorphic Algorithms
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Device to System Modeling Framework to Enable a 10 fJ per Instruction Neuromorphic Computer
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Stability of Peridynamic Correspondence Material Models and Their Particle Discretizations
Peridynamic correspondence material models provide a way to combine a material model from the local theory with the inherent capabilities of peridynamics to model long-range forces and fracture. However, correspondence models in a typical particle discretization suffer from zero-energy mode instability. These instabilities are shown here to be an aspect of material stability. A stability condition is derived for state-based materials starting from the requirement of potential energy minimization. It is shown that all correspondence materials fail this stability condition due to zero-energy deformation modes of the family. To eliminate these modes, a term is added to the correspondence strain energy density that resists deviations from a uniform deformation. The resulting material model satisfies the stability condition while effectively leaving the stress tensor unchanged. Computational examples demonstrate the effectiveness of the modified material model in avoiding zero-energy mode instability in a peridynamic particle code.
Results 4651–4675 of 9,998