PSI - Issue 77

ScienceDirect Structural Integrity Procedia 00 (2026) 000 – 000 Structural Integrity Procedia 00 (2026) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 77 (2026) 56–63

© 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSI organizers On the other hand, Fused Filament Fabrication (FFF) is a growing technology which, in the case of polymers and polymer-matrix composites, has found (so far) its greatest application in the manufacturing of prototypes. In order to develop FFF polymeric and polymer-matrix composites with engineering applications, such as structural components, it is necessary to have a sound knowledge of their mechanical behavior in the presence of defects. In this work, the fracture behavior of some commonly used FFF polymers and composites (ABS, PLA, PLA-Gr, ASA and ASA-CF), is analyzed. The analysis is performed in both cracked and notched conditions, quantifying their sensitivity to the notch effect. © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Abstract The notch effect, defined as the increase in the material fracture resistance when the defect that causes the final fracture has a finite (non-negligible) radius on the tip, may be of great importance from a structural integrity point of view. Thus, when containing defects, materials with a large notch effect develop a considerable increase in their load bearing capacity as the radius at the defect tip increases. On the other hand, Fused Filament Fabrication (FFF) is a growing technology which, in the case of polymers and polymer-matrix composites, has found (so far) its greatest application in the manufacturing of prototypes. In order to develop FFF polymeric and polymer-matrix composites with engineering applications, such as structural components, it is necessary to have a sound knowledge of their mechanical behavior in the presence of defects. In this work, the fracture behavior of some commonly used FFF polymers and composites (ABS, PLA, PLA-Gr, ASA and ASA-CF), is analyzed. The analysis is performed in both cracked and notched conditions, quantifying their sensitivity to the notch effect. © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSI organizers Keywords: additive manufacturing; notch effect; fracture 1. Introduction Additive Manufacturing (AM) is a widely used technology that allows for the easy generation of complex geometries, making it an essential tool in Industry 4.0 (e.g., Godina et al. (2020)). AM includes various technologies (e.g., binder jetting, stereolithography, selective laser sintering, etc.). One of the best-known AM technologies is fused International Conference on Structural Integrity Sensitivity to notch effect of additively manufactured polymers and polymer-matrix composites Sergio Cicero a,* , Sergio Arrieta a a Laboratory of Materials Science and Engineering (LADICIM), Departamento de Ciencia e Ingeniería del Terreno y de los Materiales, University of Cantabria, Avenida de los Castros, 44, 39005 Santander, Spain Abstract The notch effect, defined as the increase in the material fracture resistance when the defect that causes the final fracture has a finite (non-negligible) radius on the tip, may be of great importance from a structural integrity point of view. Thus, when containing defects, materials with a large notch effect develop a considerable increase in their load bearing capacity as the radius at the defect tip increases. International Conference on Structural Integrity Sensitivity to notch effect of additively manufactured polymers and polymer-matrix composites Sergio Cicero a,* , Sergio Arrieta a a Laboratory of Materials Science and Engineering (LADICIM), Departamento de Ciencia e Ingeniería del Terreno y de los Materiales, University of Cantabria, Avenida de los Castros, 44, 39005 Santander, Spain Peer-review under responsibility of ICSI organizers Keywords: additive manufacturing; notch effect; fracture 1. Introduction Additive Manufacturing (AM) is a widely used technology that allows for the easy generation of complex geometries, making it an essential tool in Industry 4.0 (e.g., Godina et al. (2020)). AM includes various technologies (e.g., binder jetting, stereolithography, selective laser sintering, etc.). One of the best-known AM technologies is fused

* Corresponding author. Tel.: +34 942 201819 E-mail address: ciceros@unican.es * Corresponding author. Tel.: +34 942 201819 E-mail address: ciceros@unican.es

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSI organizer 2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSI organizer

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSI organizers 10.1016/j.prostr.2026.01.009