Wednesday, October 25th, 2023. Time: 12.30 p.m.
Hybrid! O.C. Zienkiewicz Room, C1 Building, UPC Campus Nord, Barcelona | Link for the online session
ABSTRACT
Fused Filament Fabrication (FFF) is a polymer-based Additive Manufacturing (AM) technology that produces complex layered components. The characterization of the inherited orthotropic properties of FFF components and their failure analysis is a challenging endeavor. In this talk, the failure mechanics of FFF parts are studied via a Mechanism-Based (MB) damage material model. A MB damage criterion is developed by considering that the damage is driven by different failure modes identified according to the printing pattern. The developed criterion is compared to the Tsai-Wu (TW) criterion, which is commonly used for orthotropic materials with different strengths in tension and compression. Also, a MB cracking model that incorporates the orthotropic brittleness of FFF components is developed. Numerical predictions of the cracking of different experimental tests illustrate the similarities and the differences between the MB and TW damage criteria. The results demonstrate that the MB damage criterion can accurately match the experimental results, while the TW criterion fails to describe correctly the failure modes in complex 3D stress states.
SPEAKER CV
Ivan Rivet is a Mechanical Engineer by the Universitat Politècnica de Catalunya (Spain) and a third-year PhD candidate at CIMNE. During his Master’s he worked at the 3D printing department of Hewlett-Packard Inc. (HP) in Sant Cugat (Spain) and later he started a PhD dedicated to Computational Multiscale Analysis of components fabricated via Additive Manufacturing. He received a mobility grant from “Societat Econòmica Barcelonesa d’Amics del País” for an international research stay at the Lassonde School of Engineering from York University (Canada). For the last years, he has dedicated his research to the analysis of the mechanical performance of Fused Filament Fabrication parts via computational homogenization and the Finite Element Method (FEM), where all his new numerical developments have been implemented into the in-house software Femuss. During that time, he has been involved in several national and international projects, and he has taught at the Universitat Politècnica de Catalunya as an associate Professor.
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