El-Numodis: a new tool to model dislocation and surface interactions

• Main Authors: Amodeo, J. (Author), Dupuy, L. (Author), Fivel, M. (Author), Gonzalez Joa, J.A (Author), Perez, M. (Author), Råback, P. (Author)
• Format: Article
• Language: English
• Published: Institute of Physics 2023
• Subjects: Boundary value problems; Deformation process; discrete dislocation dynamics; Discrete dislocation dynamics; Dislocation interaction; Element models; El-numodis; El-Numodis; Finite element method; finite-element modeling; Finite-element modeling; Macroscopic scale; Monte Carlo methods; nanomechanics; Open systems; Small scale; superposition method; Superposition method; Surface interactions; Tensile testing
• Online Access: View Fulltext in Publisher; View in Scopus
• ISBN: 09650393 (ISSN)
• DOI: 10.1088/1361-651X/acd01b

While surfaces are known to have a limited impact on the mechanical properties of crystalline materials at the macroscopic scale, they play a key role at small-scale behaving alternatively as sources or sinks of various plastic deformation processes. In this study, we present a new tool called El-Numodis that relies on the superposition method to couple the discrete dislocation dynamics code Numodis to Elmer, an open-source finite-element-modeling tool. After few years of development, El-Numodis allows now for the simulation of small-scale object deformation and mechanical properties based on a large set of surface-related processes including stress-free boundaries, mirrored dislocations and a Monte-Carlo based dislocation nucleation mechanism. Here we present the main features of the code as well as numerical test-cases and benchmarks going from classical boundary value problems to tensile tests on model thin film. © 2023 IOP Publishing Ltd.