PSI - Issue 43

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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ScienceDirect

Procedia Structural Integrity 43 (2023) 77–82

© 2023 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 the responsibility of MSMF10 organizers. © 20 23 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. Abstract Now days, n oclay-rei forced polymers ar one of the most wid ly used nanocomposites due to their high aspect ratio, higher contact area and their uniq e properti s. These c mposites are u ed in a number of industrial application , such as construction building sections and structural panels), automotive (gas ank , bumpers, interior and exterior panels), c emical processes (catalysts), pharmaceutical (as carriers of drugs and penetrants), aero p c (flame retar ant pa els and high performance components), f od pack ging and textiles, etc. Their interphase properties a e essential for determ ning their proper design and safety application when applying large mechanical load on them. In thi wo k, a parametric analysis is performed to investigate how the change in the interphase prope tie influ nces the interphas shear str s (ISS) and interphase peel s ress (IPS) n a nanoclay/polymer n ocomposite structure, subjected to axial load. The two-dimensional (2D) stres -function method is applied, which results in obtaining an analytical solution for ISS and IPS. The implemen ed para etric analysis shows how varying of e terphase mechanical properti s (Young ’s modulus and Poisson ’s r tio) and their geom tric pr perties (thickness and length) influence the value o the mod l interphase stress s. It was found, t at increasing the value of Young m dulus f th in erphase does not c ange significantly the value of the model ISS, as well as the value of IPS, n the co sidered nanoclay/polymer structur . On the other hand, increasing he v lue of the interphas layer thickness becomes important for the value of ISS and IPS after 25nm. It turned o t, that the interphase layer length is the most appr ciable parameter, influencing both the odel ISS and IPS. The obtained results could be useful for the proper design and safety application of similar nanoclay/polymer composites in industry. © 20 23 The Authors. Published by Elsevier B.V. This is an ope access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. 10th International Conference on Materials Structure and Micromechanics of Fracture Analytical and parametric analysis of interface stress behaviour in nanoclay/polymer composite Wilfried Becker a* , Elisaveta Kirilova b , Tatyana Petrova b , Jordanka Ivanova c a TU Darmstadt, Institute of Structural Mechanics, Franziska-Braun-Str. 7, L5|01 347a, 64287 Darmstadt, Germany b Bulgarian Academy of Sciences, Institute of Chemical Engineering, Acad. G. Bonchev Str., Bl.103, 1113 Sofia, Bulgaria c Bulgarian Academy of Sciences, Institute of Mechanics, Acad. G. Bonchev Str., Bl.4, 1113 Sofia, Bulgaria Abstract Nowadays, nanoclay-reinforced polymers are one of the most widely used nanocomposites due to their high aspect ratio, higher contact area and their unique properties. These composites are used in a number of industrial applications, such as construction (building sections and structural panels), automotive (gas tanks, bumpers, interior and exterior panels), chemical processes (catalysts), pharmaceutical (as carriers of drugs and penetrants), aerospace (flame retardant panels and high performance components), food packaging and textiles, etc. Their interphase properties are essential for determining their proper design and safety application when applying large mechanical loads on them. In this work, a parametric analysis is performed to investigate how the change in the interphase properties influences the interphase shear stress (ISS) and interphase peel stress (IPS) in a nanoclay/polymer nanocomposite structure, subjected to axial load. The two-dimensional (2D) stress-function method is applied, which results in obtaining an analytical solution for ISS and IPS. The implemented parametric analysis shows how varying of the interphase mechanical properties (Young ’s modulus and Poisson ’s ratio) and their geometric properties (thickness and length) influence the value of the model interphase stresses. It was found, that increasing the value of Young modulus of the interphase does not change significantly the value of the model ISS, as well as the value of IPS, in the considered nanoclay/polymer structure. On the other hand, increasing the value of the interphase layer thickness becomes important for the value of ISS and IPS after 25nm. It turned out, that the interphase layer length is the most appreciable parameter, influencing both the model ISS and IPS. The obtained results could be useful for the proper design and safety application of similar nanoclay/polymer composites in industry. 10th International Conference on Materials Structure and Micromechanics of Fracture Analytical and parametric analysis of interface stress behaviour in nanoclay/polymer composite Wilfried Becker a* , Elisaveta Kirilova b , Tatyana Petrova b , Jordanka Ivanova c a TU Darmstadt, Institut of Structural Mechanics, Fra z ska-Braun-Str. 7, L5|01 347a, 64287 Darmstadt, Germany b Bulgarian Academy of Sciences, I stitute of Ch mical Engineering, Acad. G. Bonchev Str., Bl. 03, 1113 Sofi , Bulgaria c Bulgarian Academy of Sciences, Institute of Mechanics, Acad. G. Bonchev Str., Bl.4, 1113 Sofia, Bulgaria Keywords: interphase shear and peel stress; nanoclay/interphase/polymer nanocomposite; applied mechanical load; parametric analysis Keywords: interphase shear and peel stress; nanoclay/interphase/polymer nanocomposite; applied mechanical load; parametric analysis

* Corresponding author. Tel.: +0-000-000-0000 E-mail address: becker@fsm.tu-darmstadt.de * Correspon ing author. Tel.: +0 000-000-0000 E-mail address: becker@fsm.tu-darmstadt.de

2452-3216 © 2023 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 the responsibility of MSMF10 organizers. 10.1016/j.prostr.2022.12.238 2452-3216 © 2023 The Authors. Published by Elsevier B.V. This is an ope access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers. 2452-3216 © 2023 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 the responsibility of MSMF10 organizers.