PSI - Issue 64

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 64 (2024) 901–907

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures 3D-printing technology for integrating the rehabilitation and monitoring of civil structures with fiber optic Valentina Tomei a, *, Ernesto Grande a , Maura Imbimbo a , Michele A. Caponero b a Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via G. Di Biasio 43, 00143, Cassino, FR (Italy) b Centro Ricerche Frascati, ENEA, Frascati, Rome (Italy) Abstract In recent years, 3D printing technologies have become increasingly widespread in the field of architectural restoration of historical buildings and monuments. This is due to 3D printing's capability to accurately reproduce complex shapes with simplicity. Currently, within this field, 3D printing technology is generally employed for the physical reproduction of decorative/architectural components, while the reproduction of structural elements is still in its early stages. In this context, the paper presents an experimental study on 3D-printed samples made of PLA (Polylactic Acid Material), equipped with fiber optic sensors introduced inside the samples during the printing process. This innovative approach facilitates reintegration interventions while enabling real time monitoring of structures, marking a significant advancement in the field. However, since the fiber optic is incorporated within the element during the printing process, it is crucial to assess its potential impact on the mechanical properties of the samples and reliability of measurement system itself. Experimental tensile tests are then performed on samples carried out by considering both different printing paths and, moreover, different arrangements of the fiber optic inside the samples. Lastly, the study also examines the impact of artificially induced aging effects to assess their influence on both the mechanical properties of the samples and the reliability of measurements obtained from the fiber optic sensors. © 2024 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 SMAR 2024 Organizers Keywords: 3D-printing; Tensile Tests; PLA; Dog-bone samples; Health Monitoring; Optical Fiber; FBG a b © 2024 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 SMAR 2024 Organizers

* Corresponding author. E-mail address: v.tomei@unicas.it

2452-3216 © 2024 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 SMAR 2024 Organizers

2452-3216 © 2024 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 SMAR 2024 Organizers 10.1016/j.prostr.2024.09.365