PSI - Issue 64

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2024) 000 – 000 Structural Integrity Procedia 00 (2024) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 64 (2024) 1009–1016

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Exploring the influence of strain rate on BTRM tensile behaviour Amrita Milling a* , Giuseppina Amato a , Su Taylor a , Pedro Moreira b , Daniel Braga b a School of Natural and Built Environment, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, United Kingdom b Institute of Science and Innovation in Mechanical and Industrial Engineering (INEGI), FEUP Campus, Rua Dr Roberto Frias 400, 4200 - 465 Porto, Portugal Abstract Extensive research has been conducted on textile-reinforced mortars (TRM); however, a significant gap exists in understanding how strain rate influences mechanical performance. TRM composites reinforced with basalt textiles (BTRM) have become increasingly popular due to the remarkable sustainable profile of basalt fibres. However, there is limited knowledge regarding the tensile response of this composite under intermediate strain rates. The present study examined a BTRM composite consisting of a bi-directional basalt fibre textile and a commercially available mortar strengthened with short glass fibres. Coupon specimens with aluminium tabs were tested with a high-speed servohydraulic equipment at strain rates ranging from 0.5/s to 10/s. Strain and failure propagation were captured with a high-speed camera and analysed using the digital image correlation (DIC) technique. Tests were also performed under quasi-static conditions for comparison. The mechanical characteristics of the BTRM composite were assessed based on its tensile strength, ultimate strain, toughness, stress-strain behaviour, and failure mode. The findings demonstrated that the BTRM composite exhibited sensitivity to changes in strain rate. Increasing strain rates enhanced tensile strength, ultimate strain, and toughness. Furthermore, the specimens examined under dynamic conditions displayed distinct stress-strain characteristics compared to similar specimens subjected to quasi-static loadings. © 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 SMAR 2024 Organisers Keywords: basalt; textile-reinforced mortar; FRCM; dynamic; digital image correlation technique; structural strengthening SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Exploring the influence of strain rate on BTRM tensile behaviour Amrita Milling a* , Giuseppina Amato a , Su Taylor a , Pedro Moreira b , Daniel Braga b a School of Natural and Built Environment, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, United Kingdom b Institute of Science and Innovation in Mechanical and Industrial Engineering (INEGI), FEUP Campus, Rua Dr Roberto Frias 400, 4200 - 465 Porto, Portugal Abstract Extensive research has been conducted on textile-reinforced mortars (TRM); however, a significant gap exists in understanding how strain rate influences mechanical performance. TRM composites reinforced with basalt textiles (BTRM) have become increasingly popular due to the remarkable sustainable profile of basalt fibres. However, there is limited knowledge regarding the tensile response of this composite under intermediate strain rates. The present study examined a BTRM composite consisting of a bi-directional basalt fibre textile and a commercially available mortar strengthened with short glass fibres. Coupon specimens with aluminium tabs were tested with a high-speed servohydraulic equipment at strain rates ranging from 0.5/s to 10/s. Strain and failure propagation were captured with a high-speed camera and analysed using the digital image correlation (DIC) technique. Tests were also performed under quasi-static conditions for comparison. The mechanical characteristics of the BTRM composite were assessed based on its tensile strength, ultimate strain, toughness, stress-strain behaviour, and failure mode. The findings demonstrated that the BTRM composite exhibited sensitivity to changes in strain rate. Increasing strain rates enhanced tensile strength, ultimate strain, and toughness. Furthermore, the specimens examined under dynamic conditions displayed distinct stress-strain characteristics compared to similar specimens subjected to quasi-static loadings. © 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 SMAR 2024 Organisers Keywords: basalt; textile-reinforced mortar; FRCM; dynamic; digital image correlation technique; structural strengthening © 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 SMAR 2024 Organizers

* Amrita Milling. Tel.: +44-778-719-9380 E-mail address: amilling01@qub.ac.uk * Amrita Milling. Tel.: +44-778-719-9380 E-mail address: amilling01@qub.ac.uk

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 SMAR 2024 Organizers 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 SMAR 2024 Organizers

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