On micro-to-macro connections in strong coupling multiscale modeling of softening materials

On micro-to-macro connections in strong coupling multiscale modeling of softening materials

Lloberas Valls, O.
Rixen, D.J.
Simone, A.
Sluys, L.J.

Civil Engineering and Geosciences

Structural Engineering

2011-09-07

In this contribution we describe a methodology for the multiscale analysis of heterogeneous quasi-brittle materials. The algorithm is based on the finite element tearing and interconnecting FETI [1] method cast in a non-linear setting. Adaptive multiscale analysis is accounted for with the use of selective refinement at domains that undergo nonlinear processes. We focus on the micro-to-macro connection method which constitutes the strategy to handle incompatible interfaces arising from the connection of non-matching meshes. The behaviour of standard collocation and average compatibility techniques is assessed for a multiscale analysis of damage propagation in a quasi- brittle material. The choice of the connection strategy has an influence on the overall response and the computational cost of the analysis.

concurrent multiscale analysis
micro-to-macro connection
FETI
strain localization and softening

http://resolver.tudelft.nl/uuid:e297db0b-b564-4141-afc6-3e7d4c9b1163

CIMNE

978-84-89925-73-1

COMPLAS 2011: Proceedings of the 11th International Conference on Computational Plasticity: Fundamentals and Applications, Barcelona, Spain, 7-9 September 2011

Institutional Repository

conference paper

(c) 2011 The Author(s)