Flaw-tolerance of nonlocal discrete systems and interpretationaccording to network theory
Journal Title: Frattura ed Integrità Strutturale - Year 2014, Vol 8, Issue 29
Abstract
Discrete systems are modeled as a network of nodes (particles, molecules, or atoms) linked bynonlinear springs to simulate the action of van der Waals forces. Such systems are nonlocal if links connectingnon-adjacent nodes are introduced. For their topological characterization, a nonlocality index (NLI) inspired bynetwork theory is proposed. The mechanical response of 1D and 2D nonlocal discrete systems is predictedaccording to finite element (FE) simulations based on a nonlinear spring element for large displacementsimplemented in the FE programme FEAP. Uniaxial force-displacement responses of intact and defectivesystems (with links or nodes removed) are numerically simulated. Strain localization phenomena, size-scaleeffects and the ability to tolerate defects are investigated by varying the degree of nonlocality.
Authors and Affiliations
A. Infuso, M. Paggi
Keywords
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- EP ID EP99743
- DOI 10.3221/IGF-ESIS.29.26
- Views 76
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