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Journal articles
FEM×DEM multiscale modeling: Model performance enhancement from Newton strategy to element loop parallelization
Abstract : The paper presents a multiscale model based on a FEMxDEM approach, a method that couples
Discrete Elements at the micro-scale and Finite Elements at the macro-scale. FEMxDEM has
proven to be an effective way to treat real-scale engineering problems by embedding constitutive
laws numerically obtained using Discrete Elements into a standard Finite Element framework. The
proposed paper focuses on some numerical open-issues of the method. Given the problem non-
linearity, Newton’s method is required. The standard full Newton method is modified by adopting
operators different from the consistent tangent matrix and by developing ad-hoc solution strategies.
The efficiency of several existing operators is compared and a new, original strategy is proposed,
which is shown to be numerically more efficient than the existing propositions. Furthermore, a
shared memory parallelization framework using OpenMP directives is introduced. The combination
of these enhancements allow to overcome the FEMxDEM computational limitations, thus making
the approach competitive with classical FEM in terms of stability and computational cost.
https://hal.archives-ouvertes.fr/hal-01945820
Contributor : Stefano Dal Pont <>
Submitted on : Wednesday, December 5, 2018 - 3:28:18 PM
Last modification on : Friday, November 20, 2020 - 12:54:03 PM
Contributor : Stefano Dal Pont <>
Submitted on : Wednesday, December 5, 2018 - 3:28:18 PM
Last modification on : Friday, November 20, 2020 - 12:54:03 PM
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