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) 190–196

© 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. Several thods are used to study the fa igue amag progression, such as: microstructural investigation, stiff ess degradation asurements, and loss of ductility etc. to predict the re aining life of dynamically loaded components. No -destructive test e hods such a ultras nic, eddy current and infrared th rmography are th other techniques that are used to sense the change material response due to fatigu loading. This paper present glimpse of results to understand the fatigue damage progression in structural materi ls; infrared thermography s used to understand fatigue damage in cop er, while X-ray computed tomography us d to study damage pro ression in an impac damag d carbon fiber reinforce plastic laminat . T e damag volume is measured based on CT images and correlated with stiffness drop. Based on the study, it was observed that the use of multipl sensor and measurement techniques in tandem with other conventional experimental methods provides an insight into damage progression. © 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 Multi-sensor techniques to study fatigue damage progression in structural materials Raghu V. Prakash a, * a Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India Abstract Fatigue failure is catastrophic once the material reaches the critical damage, but the damage accumulation is, in general, gradual. Several methods are used to study the fatigue damage progression, such as: microstructural investigation, stiffness degradation measurements, and loss of ductility etc. to predict the remaining life of dynamically loaded components. Non-destructive test methods such as ultrasonic, eddy current and infrared thermography are the other techniques that are used to sense the change in material response due to fatigue loading. This paper presents a glimpse of results to understand the fatigue damage progression in structural materials; infrared thermography is used to understand fatigue damage in copper, while X-ray computed tomography is used to study damage progression in an impact damaged carbon fiber reinforced plastic laminate. The damage volume is measured based on CT images and correlated with stiffness drop. Based on the study, it was observed that the use of multiple sensors and measurement techniques in tandem with other conventional experimental methods provides an insight into damage progression. 10th International Conference on Materials Structure and Micromechanics of Fracture Multi-sensor techniques to study fatigue damage progression in structural materials Raghu V. Prakash a, * a Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India Abstract Fatigue failure i catastrophic once material reach s the critical damage, but the damage accumulation is, n g neral, gradual.

Keywords: Fatigue damage; infrared thermography; stiffness; CT imaging; post-impact fatigue. Keywords: Fatigue damage; infrared thermography; stiffness; CT imaging; post-impact fatigue.

1. Introduction Fatigue, generally considered as an irreversible process, results in sudden failure, but the damage progression takes place over several cycles of cyclic loading. The damage initiates at the microstructural level and then 1. Introduction Fatigue, generally considered as an irreversible proc ss, results in sudden failure, but the damage progressio takes place over several cycles of cyclic loading. The damage initiates at the microstructural level and then

* Corresponding author. Tel.: +91-44-2257 4694; fax: +91-44-2257 4652. E-mail address: raghuprakash@iitm.ac.inraghuprakash@iitm.ac.in * Correspon ing author. Tel.: +91-44-2257 4694; f x: +91-44-2257 4652. E-mail address: raghuprakash@iitm.ac.inraghuprakash@iitm.ac.in

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. 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. 10.1016/j.prostr.2022.12.257