PSI - Issue 75

ScienceDirect Structural Integrity Procedia (2025) 000 – 000 Structural Integrity Procedia (2025) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 75 (2025) 650–659

© 2025 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 Dr Fabien Lefebvre with at least 2 reviewers per paper Abstract In recent years, there has been a surge in production of high-strength steel (HSS) due to market demand. Application of HSS has increased in the field of construction and heavy industrial equipment in order to optimise the product weight, with a focus on sustainability. An important feature is that HSS has higher yield strength than conventional structural steels, but lower ductility. Based on this, it is often assumed that HSS would perform better in terms of fatigue strength. However, this assumption requires additional validation considering manufacturing and environmental effects, where higher ductility would be more beneficial. This paper discusses the comparative analysis of the total fatigue life assessment of different steel grades (from low to high) assuming crack initiation and crack propagation. © 2025 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 scientific committee of the Fatigue Design 2025 organizers Keywords: high-strength steels; ultrasonic fatigue testing; very high cycle fatigue; 1. Introduction The increasing demand for high-strength steel (HSS) in various industrial applications is driven by the need for materials that offer superior mechanical properties while promoting sustainability. HSS is extensively utilised in the construction and heavy equipment industries due to its higher yield strength compared to conventional structural steels, enabling the design of lighter, more efficient structures that maintain structural integrity. Fatigue Design 2025 (FatDes 2025) Total fatigue life testing of high strength steels and conventional steels Monisha Manjunatha a *, Yevgen Gorash a , Tugrul Comlekci a , Lewis Milne a , Donald MacKenzie a a Dept. of Mechanical and Aerospace Engineering, University of Strathclyde, 75 Montrose Street, Glasgow, G 1 1 XJ,UK Abstract In recent years, there has been a surge in production of high-strength steel (HSS) due to market demand. Application of HSS has increased in the field of construction and heavy industrial equipment in order to optimise the product weight, with a focus on sustainability. An important feature is that HSS has higher yield strength than conventional structural steels, but lower ductility. Based on this, it is often assumed that HSS would perform better in terms of fatigue strength. However, this assumption requires additional validation considering manufacturing and environmental effects, where higher ductility would be more beneficial. This paper discusses the comparative analysis of the total fatigue life assessment of different steel grades (from low to high) assuming crack initiation and crack propagation. © 2025 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 scientific committee of the Fatigue Design 2025 organizers Keywords: high-strength steels; ultrasonic fatigue testing; very high cycle fatigue; 1. Introduction The increasing demand for high-strength steel (HSS) in various industrial applications is driven by the need for materials that offer superior mechanical properties while promoting sustainability. HSS is extensively utilised in the construction and heavy equipment industries due to its higher yield strength compared to conventional structural steels, enabling the design of lighter, more efficient structures that maintain structural integrity. Fatigue Design 2025 (FatDes 2025) Total fatigue life testing of high strength steels and conventional steels Monisha Manjunatha a *, Yevgen Gorash a , Tugrul Comlekci a , Lewis Milne a , Donald MacKenzie a a Dept. of Mechanical and Aerospace Engineering, University of Strathclyde, 75 Montrose Street, Glasgow, G 1 1 XJ,UK

E-mail address: monisha.manjunatha@strath.ac.uk E-mail address: monisha.manjunatha@strath.ac.uk

2452-3216 © 2025 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 scientific committee of the Fatigue Design 2025 organizers 2452-3216 © 2025 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 scientific committee of the Fatigue Design 2025 organizers

2452-3216 © 2025 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 Dr Fabien Lefebvre with at least 2 reviewers per paper 10.1016/j.prostr.2025.11.067