PSI - Issue 82

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2026) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2026) 000–000

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ScienceDirect

Procedia Structural Integrity 82 (2026) 309–316

© 2026 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 ICSID organizers Abstract Mechanical failure at the interface of Aluminium Continuous fibre Metal Matrix composite (AMMC) with high performance Alumina fibre is discussed with respect to potential benefits to aircraft application, cause of failure, strength, endurance and a method of inspection which may be applicable. The study is limited to combinations of Aluminium LM25, 6061 and primary with the same fibre; made by liquid pressure forming (Bushby’s Patent EP1735119B1 from 2008). Comparisons are drawn against high strength Aluminium Alloys and a different type of AMMC manufactured using the diffusion bonding process with Silicon-Carbide fibres. Fibres of high stiffness when combined with matrices of a relatively low stiffness results in composite failure which is related to the interface and are superficially characterized, while also considering the effect of elevated and reduced temperature. Further, a method of inspection is characterized based upon electrical conductivity. AMMCs can be attractive to the aerospace industry due to the desire to achieve improved structural performance at reduced mass, over conventionally applicable Aluminium and Titanium Alloys to metallic structural components subjected to high loads or severe operating conditions. The present work represents the result of evaluation of the present state of technology by industry and a continued interest in developing the technology to application stage. © 2026 The Authors. Copy from the contract: 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 ICSID organizers Keywords: MMC; long-fibre; fatigue; tensile; aluminium; EN 6072; ASTM D 3552 8th International Conference on Structural Integrity and Durability (ICSID2025) Observations from mechanical failure and inspection of Aluminium MMCs with Long Al2O3 fibres Mr. Parthasarathy Iyengar a, *, Mr. Jon Mardaras b , Stephen Kyle-Henney c a Airbus UK, Metal Technology, Filton (BS34 7QQ), UK b Airbus FR, Airframe Structure, M01, 26 Chem. de l'Espeissière, 31300 Toulouse, France c TISICS Metal Composites, 22 Invincible Rd, Farnborough GU14 7QU, UK Abstract Mechanical failure at the interface of Aluminium Continuous fibre Metal Matrix composite (AMMC) with high performance Alumina fibre is discussed with respect to potential benefits to aircraft application, cause of failure, strength, endurance and a method of inspection which may be applicable. The study is limited to combinations of Aluminium LM25, 6061 and primary with the same fibre; made by liquid pressure forming (Bushby’s Patent EP1735119B1 from 2008). Comparisons are drawn against high strength Aluminium Alloys and a different type of AMMC manufactured using the diffusion bonding process with Silicon-Carbide fibres. Fibres of high stiffness when combined with matrices of a relatively low stiffness results in composite failure which is related to the interface and are superficially characterized, while also considering the effect of elevated and reduced temperature. Further, a method of inspection is characterized based upon electrical conductivity. AMMCs can be attractive to the aerospace industry due to the desire to achieve improved structural performance at reduced mass, over conventionally applicable Aluminium and Titanium Alloys to metallic structural components subjected to high loads or severe operating conditions. The present work represents the result of evaluation of the present state of technology by industry and a continued interest in developing the technology to application stage. © 2026 The Authors. Copy from the contract: 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 ICSID organizers Keywords: MMC; long-fibre; fatigue; tensile; aluminium; EN 6072; ASTM D 3552 8th International Conference on Structural Integrity and Durability (ICSID2025) Observations from mechanical failure and inspection of Aluminium MMCs with Long Al2O3 fibres Mr. Parthasarathy Iyengar a, *, Mr. Jon Mardaras b , Stephen Kyle-Henney c a Airbus UK, Metal Technology, Filton (BS34 7QQ), UK b Airbus FR, Airframe Structure, M01, 26 Chem. de l'Espeissière, 31300 Toulouse, France c TISICS Metal Composites, 22 Invincible Rd, Farnborough GU14 7QU, UK

* Corresponding author. Tel.: +44 7825027708. E-mail address: Parthasarathy.Iyengar@airbus.com * Corresponding author. Tel.: +44 7825027708. E-mail address: Parthasarathy.Iyengar@airbus.com

2452-3216 © 2026 The Authors. Copy from the contract: 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 ICSID organizers 2452-3216 © 2026 The Authors. Copy from the contract: 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 ICSID organizers

2452-3216 © 2026 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 ICSID organizers 10.1016/j.prostr.2026.04.047