Modelling of the test frequency discrepancy in USF testing of structural steels

Lewis Andrew Milne; Yevgen Gorash; Tugrul Comlekci; Donald MacKenzie; Carl Walker

doi:10.1016/j.prostr.2025.11.041

Modelling of the test frequency discrepancy in USF testing of structural steels

Lewis Andrew Milne, Yevgen Gorash^*, Tugrul Comlekci, Donald MacKenzie, Carl Walker

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

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Abstract

This research addresses the discrepancy in fatigue resistance between the test data for conventional test frequency and accelerated frequency for common structural steels. As the most commonly attributed factor for the difference is the increase in strain rate at elevated test frequencies, high strain rate tensile tests were carried out to evaluate the influence of strain rate on material strength. The tested steels exhibited an increase in yield strength of 28-48% at strain rates corresponding to 20kHz. Normalising the SN curves by the dynamic yield strength was not sufficient to account for the discrepancy in fatigue resistance, however, pointing to the existence of some other factor influencing the frequency sensitivity.

Original language	English
Pages (from-to)	419-425
Number of pages	7
Journal	Procedia Structural Integrity
Volume	75
DOIs	https://doi.org/10.1016/j.prostr.2025.11.041
Publication status	Published - 12 Dec 2025
Event	Fatigue Design 2025: FD2025 - CETIM, Senlis, France Duration: 19 Nov 2025 → 20 Nov 2025

Keywords

Structural steel
Very High Cycle Fatigue
Ultrasonic Testing
High strain rate testing
Frequency effect

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10.1016/j.prostr.2025.11.041Licence: CC BY-NC-ND 4.0

Milne et al. - 2025 - Modelling of the Test Frequency Discrepancy in USF Testing of Structural SteelsFinal published version, 1.15 MBLicence: CC BY-NC-ND 4.0

1 Article

Development and evaluation of frequency sensitivity models in ultrasonic fatigue testing of ferritic-pearlitic steels
Milne, L., Gorash, Y. & Comlekci, T., 22 Dec 2025, In: Applied Sciences. 16, 1, 20 p., 105.
Research output: Contribution to journal › Article › peer-review

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@article{b82bf06a69ec42bfa4b768b432e6f145,

title = "Modelling of the test frequency discrepancy in USF testing of structural steels",

abstract = "This research addresses the discrepancy in fatigue resistance between the test data for conventional test frequency and accelerated frequency for common structural steels. As the most commonly attributed factor for the difference is the increase in strain rate at elevated test frequencies, high strain rate tensile tests were carried out to evaluate the influence of strain rate on material strength. The tested steels exhibited an increase in yield strength of 28-48\% at strain rates corresponding to 20kHz. Normalising the SN curves by the dynamic yield strength was not sufficient to account for the discrepancy in fatigue resistance, however, pointing to the existence of some other factor influencing the frequency sensitivity.",

keywords = "Structural steel, Very High Cycle Fatigue, Ultrasonic Testing, High strain rate testing, Frequency effect",

author = "Milne, \{Lewis Andrew\} and Yevgen Gorash and Tugrul Comlekci and Donald MacKenzie and Carl Walker",

year = "2025",

month = dec,

day = "12",

doi = "10.1016/j.prostr.2025.11.041",

language = "English",

volume = "75",

pages = "419--425",

journal = "Procedia Structural Integrity",

issn = "2452-3216",

note = "Fatigue Design 2025 : FD2025 ; Conference date: 19-11-2025 Through 20-11-2025",

}

TY - JOUR

T1 - Modelling of the test frequency discrepancy in USF testing of structural steels

AU - Milne, Lewis Andrew

AU - Gorash, Yevgen

AU - Comlekci, Tugrul

AU - MacKenzie, Donald

AU - Walker, Carl

PY - 2025/12/12

Y1 - 2025/12/12

N2 - This research addresses the discrepancy in fatigue resistance between the test data for conventional test frequency and accelerated frequency for common structural steels. As the most commonly attributed factor for the difference is the increase in strain rate at elevated test frequencies, high strain rate tensile tests were carried out to evaluate the influence of strain rate on material strength. The tested steels exhibited an increase in yield strength of 28-48% at strain rates corresponding to 20kHz. Normalising the SN curves by the dynamic yield strength was not sufficient to account for the discrepancy in fatigue resistance, however, pointing to the existence of some other factor influencing the frequency sensitivity.

AB - This research addresses the discrepancy in fatigue resistance between the test data for conventional test frequency and accelerated frequency for common structural steels. As the most commonly attributed factor for the difference is the increase in strain rate at elevated test frequencies, high strain rate tensile tests were carried out to evaluate the influence of strain rate on material strength. The tested steels exhibited an increase in yield strength of 28-48% at strain rates corresponding to 20kHz. Normalising the SN curves by the dynamic yield strength was not sufficient to account for the discrepancy in fatigue resistance, however, pointing to the existence of some other factor influencing the frequency sensitivity.

KW - Structural steel

KW - Very High Cycle Fatigue

KW - Ultrasonic Testing

KW - High strain rate testing

KW - Frequency effect

U2 - 10.1016/j.prostr.2025.11.041

DO - 10.1016/j.prostr.2025.11.041

M3 - Conference article

SN - 2452-3216

VL - 75

SP - 419

EP - 425

JO - Procedia Structural Integrity

JF - Procedia Structural Integrity

T2 - Fatigue Design 2025

Y2 - 19 November 2025 through 20 November 2025

ER -

Modelling of the test frequency discrepancy in USF testing of structural steels

Abstract

Keywords

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Research output

Development and evaluation of frequency sensitivity models in ultrasonic fatigue testing of ferritic-pearlitic steels

Cite this