PSI - Issue 28

ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceDire t Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 28 (2020) 2206–2217

© 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 Biomimicry has been a source of inspiration for scientists in a quest for development. Natural materials are multifunctional to some extent. Similarly, in pursuit of multiple functionalities, a carbon fibre reinforced epoxy composite (ref specimen) and carbon fibre reinforced epoxy composite enhanced by functionalised interlayer technology (FIT) touted as an electrically conductive specimen (ec specimen) are compared based on their tensile, flexural and G IC Mode-I fracture properties. Tensile, flexural and DCB mode-I fracture tests were performed according to test standards ASTM D3039, ASTM D790, and ASTM D5528 respectively. Comparison of these two distinct specimens showed similar tensile stress values, 13.24 % increase in tensile strain and 15.17 % decrease of elastic modulus for ec specimen. Flexural stress increases by 6.43%, flexural strain suffered a decline of 41.60% and flexural modulus increased by 32.76% for ec specimen. For Mode-I fracture tests, ec specimens absorbed more energy before the crack jump corresponding to the first unloading. However, both ref and ec specimens showed similar permanent deformation after the second unloading. Energy release rate (ERR) of ec specimens was lower when compared with ref specimens. On comparison, modulus values for ec specimen showed an increase, as the delamination front progressed beyond 60 mm. © 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: Aeronautics; Fracture Toughness, Mechanical Characterization; Multifunctional Composites 1st Virtual European Conference on Fracture Analysis of Mechanical Behavior of Multi-functional CFRP under Bending and DCB Mode-I Fracture Anurag Singh 1* , Sahand P. Shamchi 1,2 , Carmen Sguazzo 1 , Xiaosu Yi 3,4,5 , Z. Zhao 3,4 , Pedro M.G.P. Moreira 1 1 INEGI, Institute of Mechanical Engineering and Industrial Management, Porto, Portugal, 2 FEUP, Faculty of Engineering, University of Porto, Porto, Portugal, 3 School of Civil Engineering, Harbin Institute of Technology, Harbin, China, 4 AVIC Composites Co., Beijing, China, 5 Faculty of Science and Engineering, University of Nottingham, Ningbo, China Abstract Biomimicry has been a source of inspiration for scientists in a quest for development. Natural materials are multifunctional to some extent. Similarly, in pursuit of multi le functionalities, a carbon fibre reinforced poxy composit (ref specimen) and carbon fibr reinforced epox composite enhanced by functionalised interlayer technology (FIT) touted as an electrically conductive specimen ( c spe im n) are co pared based on their tensile, flexural and G IC Mode-I fracture properties. T nsile, flexural and DCB mode-I fracture tests were performed according to test standards ASTM D3039, ASTM D790, and ASTM D5528 respectively. Comparison of thes two distinct specimens showed similar tensile stress values, 13.24 % increase in tensile strain and 15.17 % decre se of elastic modulus for ec specimen. Flexural stress incr ases by 6.43%, flexural strain suffered a decli e of 41.60% and flexural modulus increased by 32.76% for ec specimen. For Mode-I fracture tests, ec specimens absorbe mor energy before the crack jump corresponding to the first unloading. However, b th ref and ec specimens showed similar per anent deformation after the second unloading. Energy release rate (ERR) of ec specim ns was lower when c mpared with ref specimens. On comparison, modulus values for ec specimen show d an increase, as the delamination front progressed beyond 60 mm. © 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 European Structural Integri y So i ty (ESIS) ExCo Keywords: Aeronautics; Fracture Toughness, Mechanical Characterization; Multifunctional Composites 1st Virtual European Conference on Fracture Analysis of Mechanical Behavior of Multi-functional CFRP under Bending and DCB Mode-I Fracture Anurag Singh 1* , Sahand P. Shamchi 1,2 , Carmen Sguazzo 1 , Xiaosu Yi 3,4,5 , Z. Zhao 3,4 , Pedro M.G.P. Moreira 1 1 INEGI, Institute of Mechanical Engineering and Industrial Management, Porto, Portugal, 2 FEUP, Faculty of Engineering, University of Porto, Porto, Portugal, 3 School of Civil Engineering, Harbin Institute of Technology, Harbin, China, 4 AVIC Composites Co., Beijing, China, 5 Faculty of Science and Engineering, University of Nottingham, Ningbo, China Abstract

* Corresponding author E-mail address: asingh@inegi.up.pt * Corresponding author E-mail address: asingh@inegi.up.pt

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 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 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.2020.11.049