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Activity Number:
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539
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Type:
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Contributed
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Date/Time:
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Wednesday, August 3, 2016 : 10:30 AM to 12:20 PM
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Sponsor:
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Section on Physical and Engineering Sciences
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Abstract #319334
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View Presentation
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Title:
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Modeling Material Stress Using Integrals of Gaussian Markov Random Fields
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Author(s):
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Peter Marcy* and Scott Vander Wiel and Curtis Storlie
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Companies:
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Los Alamos National Laboratory and Los Alamos National Laboratory and Mayo Clinic
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Keywords:
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Gaussian Markov Random Field ;
non-stationarity ;
computer model ;
integrated stochastic process ;
Bayesian inference ;
MCMC
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Abstract:
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Material scientists are interested in the variability of stress conditions as compressive forces are applied throughout a volume. Sophisticated computer codes are used to simulate von Mises stress fields, and it is often observed that the internal grain boundary structure is important. We describe the non-stationary stress field within a realized cube of tantalum (having tens of grains and >570,000 computational elements) with a model featuring integrals of GMRFs on second- and third-order grain boundaries.
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Authors who are presenting talks have a * after their name.
