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Tazi, Mohamed Amine (author), de Araujo Alves Lima, Rosemere (author), Silva, Enio Henrique Pires da (author), Jebli, Mouad (author), Teixeira De Freitas, S. (author), Casari, Pascal (author), De Barros, S.R. (author)Using fiber-reinforced composite patches for repairing damaged structures made of metal or/and concrete is an interesting and widely available solution on the market using synthetic materials. These repairing patches are bonded on the structures’ surfaces to increase their strength against internal stresses, as well as protect them from external...journal article 2023
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de Araujo Alves Lima, Rosemere (author), Tao, R. (author), Bernasconi, A. (author), Carboni, Michele (author), Carrere, Nicolas (author), Teixeira De Freitas, S. (author)Understanding the relationship between the sensors’ outputs and the damage evolution within the joints is becoming increasingly crucial to improving structural health monitoring systems and collecting data to improve the joint’s design. Therefore, a study of the acoustic emission method associated with visual fracture evaluation was proposed to...poster 2023
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Moazzami, M. (author), Akhavan-Safar, A. (author), Ayatollahi, M. R. (author), Poulis, J.A. (author), da Silva, L. F.M. (author), Teixeira De Freitas, S. (author)Adhesive joints are frequently exposed to cyclic ageing conditions during their service life, which can have a substantial impact on the mechanical properties of both the adhesive and the substrates. The safe life philosophy, commonly employed in the design of bonded joints, underscores the importance of obtaining an accurate estimate of the...journal article 2023
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Blackman, Bamber (author), Sun, Fengzhen (author), Teixeira De Freitas, S. (author), De Barros, S.R. (author), Moreira Arouche, M. (author), Ivankovic, Alojz (author)This chapter discusses the mixed-mode loading of adhesive joints. The importance of mixed-mode loading is first introduced and then test methods commonly used to measure the mixed-mode fracture resistance of adhesive joints are presented and briefly discussed. The approaches to determine the fracture resistance are briefly reviewed and then...book chapter 2023
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Teixeira De Freitas, S. (author), Budzik, Michal K. (author)The bondline thickness is a crucial parameter affecting the strength and toughness of adhesive joints. This parameter is responsible for the stress distribution, and thus, the efficiency of the stress transfer between the adherends, the failure modes, and the correspondent failure loads. However, the available literature reports different...book chapter 2023
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Saeedifar, M. (author), Saleh, M. (author), Krairi, Anouar (author), Teixeira De Freitas, S. (author), Zarouchas, D. (author)The present study proposes a comprehensive integrity assessment approach for a full-scale adhesively-bonded bi-material joint for maritime applications. The joint represents a cross-section of the bond-line connection of a ship with a steel hull and a sandwich composite superstructure. The full-scale joint consists of a sandwich composite...journal article 2023
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Charpentier, G.V.M. (author), Lafont, Ugo (author), Teixeira De Freitas, S. (author)Spacecrafts are subjected to very few mechanical loads but in the future with reusable spacecraft designed for interplanetary explorations and with the repetition of landing and take off, structures will be subjected to significant mechanical loads. The degradation due to space aging conditions, of the adhesive materials used as joints in space...conference paper 2022
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Tomić, Nataša Z. (author), Saeedifar, M. (author), Saleh, M. (author), Marinković, Aleksandar (author), Zarouchas, D. (author), Teixeira De Freitas, S. (author)The aim of this research was to investigate the self-healing potential of damaged Al joints when bonded using novel eco-epoxide adhesives derived from tannic acid (TA). Two eco-epoxy components based on TA, (A) glycidyl ether and (B) glycidyl phosphate ester of TA, were produced. The effect of the eco-epoxy components on the self-healing...journal article 2022
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Saleh, M. (author), Budzik, Michal K. (author), Saeedifar, M. (author), Zarouchas, D. (author), Teixeira De Freitas, S. (author)Thicker bondlines along with manufacturing-tolerant and fracture-resistant adhesives are trends visible across different industries, especially maritime. In this work, two contrasting adhesives: an elastic-brittle epoxy-based, and a nonlinear-ductile methyl methacrylate (MMA) are characterized and compared via tensile, compact tension (CT)...journal article 2022
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Moazzami, M. (author), Ayatollahi, Majid R. (author), Akhavan-Safar, Alireza (author), Teixeira De Freitas, S. (author), Poulis, J.A. (author), da Silva, Lucas F.M. (author)The adhesive layer in the adhesive joints can experience different modes of loading. Although the fracture energy of adhesive is generally considered to be a material parameter, it is found to be a function of the joint configuration too. Thus, to accurately simulate the behaviour of bonded joints, it is recommended to obtain the fracture...journal article 2022
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Tao, R. (author), Lubineau, Gilles (author), Teixeira De Freitas, S. (author)Carbon fiber-reinforced polymers (CFRPs) have widely attracted the aerospace and automotive industries due to high stiffness and lightweight. Secondary adhesive bonding of CFRPs is a promising research field to fully explore their potential. However, multiple challenges have limited the further application of adhesively-bonded composite joints...conference paper 2022
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Saleh, M. (author), Tomić, Nataša Z. (author), Marinković, Aleksandar (author), Teixeira De Freitas, S. (author)Two synthesized eco-epoxy components based on TA: (A) glycidyl ether and (B) glycidyl phosphate ester, are used, as a replacement for the Bisphenol A (BPA) based epoxy component, for bonding aluminum (Al) and carbon fiber reinforced polymer (CFRP). Their effect on the mode I fracture toughness (GI) is evaluated by Double Cantilever Beam (DCB)...journal article 2021
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Tomić, Nataša Z. (author), Saleh, M. (author), Saeedifar, M. (author), Marinković, Aleksandar (author), Teixeira De Freitas, S. (author)The aim of this paper is to study the self-healing capability of fractured Al joints bonded with novel eco-epoxide adhesives synthesized from a bio-renewable raw material (tannic acid – TA). Two synthesized eco-epoxy components based on TA, (A) glycidyl ether and (B) glycidyl phosphate ester of TA, were used as a replacement for the toxic epoxy...journal article 2021
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Budzik, Michal K. (author), Wolfahrt, Markus (author), Reis, Paulo (author), Kozłowski, Marcin (author), Sena-Cruz, José (author), Papadakis, Loucas (author), Saleh, M. (author), Machalicka, Klara V. (author), Teixeira De Freitas, S. (author), Vassilopoulos, Anastasios P. (author)The development of new adhesives has allowed to expand the application of bonding into the most diverse industrial fields. This review article presents the commonly used experimental methods for the investigation of mechanical performance of adhesively bonded joints in the aerospace, wind energy, automotive and civil engineering sectors. In...review 2021
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Kupski, J.A. (author), Teixeira De Freitas, S. (author)Adhesive bonding is one of the most suitable joining technologies in terms of weight and mechanical performance for current carbon fiber reinforced polymer aircraft fuselage structures. However, traditional joint topologies such as single overlap joints induce high peel stresses, resulting in sudden failure and low joint strength when...journal article 2021
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Arouche, M.M. (author), Saleh, M. (author), Teixeira De Freitas, S. (author), De Barros, S.R. (author)This work investigates the effect of long-term environmental exposure on the performance of composite-to-metal bonded joints. Specimens are manufactured using a carbon-fiber reinforced polymer (CFRP) co-bonded to a steel member with epoxy adhesive and aged in a salt spray chamber. The mixed-mode fracture behavior of the non-aged and aged...journal article 2021
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Saeedifar, M. (author), Saleh, M. (author), Nijhuis, Peter (author), Teixeira De Freitas, S. (author), Zarouchas, D. (author)This study is devoted to the use of acoustic emission technique for a comprehensive damage assessment, that is, damage detection, localization, and classification, of an aeronautical metal-to-composite bonded panel. The structure comprised a titanium panel adhesively bonded to carbon fiber–reinforced plastic omega stringers. The panel contained...journal article 2021
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Kupski, J.A. (author), Teixeira De Freitas, S. (author), Zarouchas, D. (author), Benedictus, R. (author)The goal of this study is to explore new topologies for adhesively bonded composite overlap joints in order to improve their strength under tensile loading. Multiple stacked overlaps, also referred as finger joints, are compared with single overlap topologies. The quasi-static tensile behaviour of single lap joints with two overlap lengths 12...journal article 2020
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Quan, D. (author), Alderliesten, R.C. (author), Dransfeld, C.A. (author), Tsakoniatis, Ioannis (author), Teixeira De Freitas, S. (author), Scarselli, Gennaro (author), Murphy, Neal (author), Ivanković, Alojz (author), Benedictus, R. (author)A high-power UV-irradiation technique was proposed for the surface treatment of PPS and PEEK composites, aiming to achieve good adhesion with epoxy adhesives. The composite substrates were rapidly UV-irradiated for a duration of between 2–30s, and then bonded using an aerospace film adhesive to produce joints. Tensile lap-shear strength and...journal article 2020
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Tomić, Nataša Z. (author), Saleh, M. (author), Teixeira De Freitas, S. (author), Živković, Andreja (author), Vuksanović, Marija (author), Poulis, J.A. (author), Marinković, Aleksandar (author)This paper presents a new process for obtaining eco-epoxide adhesives synthesized from bio-renewable raw material (tannic acid-TA) and used for bonding lightweight materials (aluminum (Al) and carbon fiber reinforced polymer (CFRP). Two synthesized bio-epoxy components based on TA, (A) glycidyl ether and (B) glycidyl phosphate ester of TA,...journal article 2020
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