[en] Numerical approaches of the homogenisation of the microstructural behaviour of materials used in
combination with macro-scale numerical methods, e.g. Finite Element Method, are an alternative to
the well-known classical way that consist in formulating mathematically constitutive equations
supposed to represent the behaviour of the material, and implementing these equations as local
stress-strain rate laws where and when these laws are needed, i.e., for FEM, when updating update
the local stresses in the iteration process of the Newton-Raphson (or else) algorithm [1-5].
Although very promising, these approaches called “Multiscale Numerical Analysis” are clearly
more CPU- time demanding than the classical way, inducing some scepticism with respect to the
perspectives of becoming practical modelling tools. In this presentation we propose to discuss this
issue, and illustrate different perspectives of improvement of the numerical efficiency of the Multi
scale approach, in the case of FEMxDEM method which associates Fem at the macro scale and
Dem at the micro scale.
Disciplines :
Materials science & engineering
Author, co-author :
Argilaga, Albert ; Université de Liège - ULiège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Desrues, Jacques
Dal Pont, Stefano
Combe, Gaël
Caillerie, Denis
Language :
English
Title :
Are FEM-DEM multi-scale computations too numerically intensive for real computations ? Tracks to overcome the CPU issue
