PSI - Issue 60

Available online at www.sciencedirect.com

Available online at www.sciencedirect.com Available online at www.sciencedirect.com Available online at www.sciencedirect.com

ScienceDirect Structural Integrity Procedia 00 (2024) 000–000 Procedia Structural Integrity 60 (2024) 256–263 Structural Integrity Procedia 00 (2024) 000–000 Structural Integrity Procedia 00 (2024) 000–000

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© 2024 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 ICONS 2023 Organizers © 2024 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 ICONS 2023 Organizers Keywords: Bonded patch repair, Finite element analysis Abstract 1 Composite materials are used extensively in high-performance structural applications primarily due to their superior material properties. Composite materials are much more prone to various types of damage and repairing damaged components is inevitable. Adhesively bonded patch repair, i.e. adding an external patch to the damaged area to share the load that strengthens the component, is a simple and cost-effective repair technique. This paper studies how the repair properties will be affected by removing the damaged material and refilling it with epoxy or chopped fiber composite. This study considers two types of damage and three different patch configurations. The impact damage was simulated by finite element analysis using the commercial FEA package ABAQUS®. A progressive damage material model was used to simulate the in-plane behavior. The adhesive behavior at the interface was modelled using cohesive elements. The load-displacement behavior of the specimens repaired with various repair configurations was studied using FEA. It is noted that removing the damaged area and filling it with the chopped fiber composite improves the repair efficiency significantly. More conclusions were derived on whether removing and filling the damaged material with the pristine material improves repair efficiency in various configurations. © 2024 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 ICONS 2023 Organizers Keywords: Bonded patch repair, Finite element analysis 1. Introduction Composite materials are becoming increasingly popular as potential materials for structural applications. The applications range from commercial home appliances and automotive parts to high-performance applications such as windmills and aerospace structures. The primary reason for such widespread adoption of composites is their superior mechanical properties. Even a commercial-grade glass fiber-reinforced polymer composite can have comparable strength to typical mild steel [Jefferson et.al. (2018)] . A well-designed carbon fiber reinforced composite (CFRP) can have comparable stiffness, yet, be, several times stronger and with a fraction of density compared to the typical 1 ∗ Corresponding author. Tel.: +91-44-2247-4694; fax: +91-44-2257-4652. E-mail address: sreenath@nitc.ac.in; raghuprakash@iitm.ac.in Abstract 1 Composite materials are used extensively in high-performance structural applications primarily due to their superior material properties. Composite materials are much more prone to various types of damage and repairing damaged components is inevitable. Adhesively bonded patch repair, i.e. adding an external patch to the damaged area to share the load that strengthens the component, is a simple and cost-effective repair technique. This paper studies how the repair properties will be affected by removing the damaged material and refilling it with epoxy or chopped fiber composite. This study considers two types of damage and three different patch configurations. The impact damage was simulated by finite element analysis using the commercial FEA package ABAQUS®. A progressive damage material model was used to simulate the in-plane behavior. The adhesive behavior at the interface was modelled using cohesive elements. The load-displacement behavior of the specimens repaired with various repair configurations was studied using FEA. It is noted that removing the damaged area and filling it with the chopped fiber composite improves the repair efficiency significantly. More conclusions were derived on whether removing and filling the damaged material with the pristine material improves repair efficiency in various configurations. © 2024 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 ICONS 2023 Organizers Keywords: Bonded patch repair, Finite element analysis 1. Introduction Composite materials are becoming increasingly popular as potential materials for structural applications. The applications range from commercial home appliances and automotive parts to high-performance applications such as windmills and aerospace structures. The primary reason for such widespread adoption of composites is their superior mechanical properties. Even a commercial-grade glass fiber-reinforced polymer composite can have comparable strength to typical mild steel [Jefferson et.al. (2018)] . A well-designed carbon fiber reinforced composite (CFRP) can have comparable stiffness, yet, be, several times stronger and with a fraction of density compared to the typical 1 ∗ Corresponding author. Tel.: +91-44-2247-4694; fax: +91-44-2257-4652. E-mail address: sreenath@nitc.ac.in; raghuprakash@iitm.ac.in Third International Conference on Structural Integrity 2023 (ICONS 2023) Effect of Damage Removal and Filling on Repair Efficiency of Patch Repaired Composite Laminates: A Numerical Study A. M. Sreenath a , Raghu V. Prakash b* a. Department of Mechanical Engineering, National Institute of Technology Calicut India (sreenath@nitc.ac.in). b. Department of Mechanical Engineering , Indian Institute of Technology Madras, India (raghuprakash@iitm.ac.in). Abstract 1 Composite materials are used extensively in high-performance structural applications primarily due to their superior material properties. Composite materials are much more prone to various types of damage and repairing damaged components is inevitable. Adhesively bonded patch repair, i.e. adding an external patch to the damaged area to share the load that strengthens the component, is a simple and cost-effective repair technique. This paper studies how the repair properties will be affected by removing the damaged material and refilling it with epoxy or chopped fiber composite. This study considers two types of damage and three different patch configurations. The impact damage was simulated by finite element analysis using the commercial FEA package ABAQUS®. A progressive damage material model was used to simulate the in-plane behavior. The adhesive behavior at the interface was modelled using cohesive elements. The load-displacement behavior of the specimens repaired with various repair configurations was studied using FEA. It is noted that removing the damaged area and filling it with the chopped fiber composite improves the repair efficiency significantly. More conclusions were derived on whether removing and filling the damaged material with the pristine material improves repair efficiency in various configurations. Third International Conference on Structural Integrity 2023 (ICONS 2023) Effect of Damage Removal and Filling on Repair Efficiency of Patch Repaired Composite Laminates: A Numerical Study A. M. Sreenath a , Raghu V. Prakash b* a. Department of Mechanical Engineering, National Institute of Technology Calicut India (sreenath@nitc.ac.in). b. Department of Mechanical Engineering , Indian Institute of Technology Madras, India (raghuprakash@iitm.ac.in). Third International Conference on Structural Integrity 2023 (ICONS 2023) A. M. Sreenath a , Raghu V. Prakash b* a. Department of Mechanical Engineering, National Institute of Technology Calicut India (sreenath@nitc.ac.in). b. Department of Mechanical Engineering , Indian Institute of Technology Madras, India (raghuprakash@iitm.ac.in). 1. Introduction Composite materials are becoming increasingly popular as potential materials for structural applications. The applications range from commercial home appliances and automotive parts to high-performance applications such as windmills and aerospace structures. The primary reason for such widespread adoption of composites is their superior mechanical properties. Even a commercial-grade glass fiber-reinforced polymer composite can have comparable strength to typical mild steel [Jefferson et.al. (2018)] . A well-designed carbon fiber reinforced composite (CFRP) can have comparable stiffness, yet, be, several times stronger and with a fraction of density compared to the typical 1 ∗ Corresponding author. Tel.: +91-44-2247-4694; fax: +91-44-2257-4652. E-mail address: sreenath@nitc.ac.in; raghuprakash@iitm.ac.in

2452-3216 © 2024 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 ICONS 2023 Organizers 10.1016/j.prostr.2024.05.047 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. Peer-review under responsibility of the ICONS 2023 2452-3216 © 2024 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 ICONS 2023 2452-3216 © 2024 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 ICONS 2023