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Session G03 - Computational Materials II.
session, Tuesday afternoon, June 7, 14:00
Allegheny Room, Westin William Penn Hotel
A simple elastic-plastic model is used to study the behaviour of disordered fibrous material under tensile elongation. The model is based on continuum mechanical energy functional written in terms of nodal displacement field. As a computational simplification, the system is allowed to deform only in the direction of loading. This allows statistical considerations over large spectrum of length scales. Our simulations show that plastic strains are localized on narrow bands i.e. 'strain lines' across the disordered material. These non-uniform strain patterns resemble shear bands or Lüder lines commonly observed in metals, although the underlying phenomena are quite different. We compare the simulated strain patterns to those observed experimentally in paper. We show that the strain lines are not due to fibrous microstructure, but can be explained in terms of disorder.