PSI - Issue 28

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 vailable online at .sciencedirect.co i i t Structural Integrity Procedia 00 (2019) 000–000

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ScienceDirect

Procedia Structural Integrity 28 (2020) 2132–2141

© 2020 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 the European Structural Integrity Society (ESIS) ExCo Abstract Carbon composite materials have been made a promising source for many advanced technological constructions. A large amount of experimental and theoretical efforts has been carried out in order to study their mechanical properties, in these years. This present study focuses on the approximation of graphene- concrete composites properties using advanced techniques in order to achieve successfully modelling of the composites. Two type of modelling techniques will be used: analytical modelling and numerical modelling. The results of the aforementioned methods will be compared to experimental results. A comparison is made between two different analyses combinations, the first one being a multi-step homogenization method with the random orientation tensor, and the second one being an Representative Volume Element (RVE) based homogenization with orientation of inclusion being given by fixed angles. In this research, the homogenization tool of the ANSA © software package was used for the creation of the inclusion geometries in a cubic matrix and for mesh generation. After this step, the calculation of the homogenized material properties followed, and the next step was the modelling of the pre-cracked specimens, in order to compare with the experimental results. © 2020 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 the European Structural Integrity Society (ESIS) ExCo Keywords: cement matrix - carbon nanotube composites, finite element homogenization, fixed angles orientation, Representative Volume Element, multi-step homogenization, random orientation tensor, periodic geometry algorithm bstract arbon co posite aterials have been ade a pro ising source for any advanced technological constructions. large a ount of experi ental and theoretical efforts has been carried out in order to study their echanical properties, in these years. This present study focuses on the approxi ation of graphene- concrete co posites properties using advanced techniques in order to achieve successfully odelling of the co posites. T o type of odelling techniques ill be used: analytical odelling and nu erical odelling. The results of the afore entioned ethods ill be co pared to experi ental results. co parison is ade bet een t o different analyses co binations, the first one being a ulti-step ho ogenization ethod ith the rando orientation tensor, and the second one being an epresentative olu e Ele ent ( E) based ho ogenization ith orientation of inclusion being given by fixed angles. In this research, the ho ogenization tool of the S © soft are package as used for the creation of the inclusion geo etries in a cubic atrix and for esh generation. fter this step, the calculation of the ho ogenized aterial properties follo ed, and the next step was the odelling of the pre-cracked speci ens, in order to co pare ith the experi ental results. © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the - - license (https://creativeco ons.org/licenses/by-nc-nd/4.0) Peer-revie under responsibility of the European Structural Integrity Society (ESIS) Ex o Keywords: ce ent atrix - carbon nanotube co posites, finite ele ent ho ogenization, fixed angles orientation, Representative olu e Ele ent, ulti-step ho ogenization, rando orientation tensor, periodic geo etry algorith 1 st Virtual European Conference on Fracture Calculation of a composite material's modulus of elasticity: comparison of results using fixed angles orientation and RVE with those using random orientation tensor and multi-step homogenization Stylianos Anastopoulos a , Faidra Givannaki b , Paraskevas Papanikos c , Zoi Metaxa d , and Nikolaos. D. Alexopoulos a* a University of the Aegean, Department of Financial and Management Engineering, 41 Kountouriotou Str., 82132, Chios, Greece, b BETA CAE Systems SA. Kato Scholari, GR-57500 Epanomi, Greece 1 st irt al r ea fere ce ract re l l ti f it t ri l' l f l ti it : ri f r lt i fi l ri t ti it t i r ri t ti t r lti- t i ti t li s st l s a , i r i i b , r s s i s c , i t d , i l s. . l l s a* a niversity of the Aegean, epart ent of Financial and anage ent Engineering, 41 Kountouriotou Str., 82132, Chios, reece, b BETA CAE Systems SA. Kato Scholari, GR-57500 Epano i, reece c epart ent of Product and Syste s esign Engineering, niversity of the Aegean, Syros, reece d International ellenic niversity, epart ent of Che istry, St. Luke, 65404, Kavala, reece c Department of Product and Systems Design Engineering, University of the Aegean, Syros, Greece d International Hellenic University, Department of Chemistry, St. Luke, 65404, Kavala, Greece

* Corresponding author. Tel.: +30 22710 35464 E-mail address: nalexop@aegean.gr * Corresponding author. Tel.: +30 22710 35464 E- ail address: nalexop aegean.gr

2452-3216 © 2020 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 the European Structural Integrity Society (ESIS) ExCo 2452-3216 2020 The uthors. Published by ELSE IER B. . This is an open access article under the CC B - C- license (https://creativeco ons.org/licenses/by-nc-nd/4.0) Peer-revie under responsibility of the European Structural Integrity Society (ESIS) ExCo

2452-3216 © 2020 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 the European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.11.040