FEM×DEM multiscale modeling: Model performance enhancement from Newton strategy to element loop parallelization

A. Argilaga 1, 2 J. Desrues 1, 2 Stefano Dal Pont 1, 2 Gaël Combe 1, 2 D. Caillerie 1, 2
1 3SR - Laboratoire sols, solides, structures - risques [Grenoble]
2 GéoMécanique
3SR - Laboratoire sols, solides, structures - risques [Grenoble]
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.
Keywords : parallelization Newton Numerical homogenization FEMxDEM multiscale
Document type :
Journal articles
Complete list of metadatas
https://hal.archives-ouvertes.fr/hal-01945820
Contributor : Stefano Dal Pont <>
Submitted on : Wednesday, December 5, 2018 - 3:28:18 PM
Last modification on : Tuesday, March 19, 2019 - 9:44:37 PM

Links full text

openaccess

Identifiers

Collections

CNRS | 3S-R | UGA

Citation

A. Argilaga, J. Desrues, Stefano Dal Pont, Gaël Combe, D. Caillerie. FEM×DEM multiscale modeling: Model performance enhancement from Newton strategy to element loop parallelization. International Journal for Numerical Methods in Engineering, Wiley, 2018, 114 (1), pp.47-65. ⟨10.1002/nme.5732⟩. ⟨hal-01945820⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

61

Contact

Informations

CCSD