A digital twin approach toward unlocking elasto-plastic fatigue crack growth rates under negative load ratios

被引：3

作者：

Cheok, Evan Wei Wen ^{[1
]}

Qian, Xudong ^{[1
]}

Quek, Ser Tong ^{[1
]}

Si, Michael Boon Ing ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Civil & Environm Engn, Singapore 117576, Singapore

来源：

ENGINEERING FRACTURE MECHANICS | 2024年 / 301卷

关键词：

Digital twin; Data -driven approach; Cracks; Elasto-plastic fatigue crack growth; Variable amplitude loading; HIGH-STRENGTH STEEL; PROPAGATION; PREDICTION;

D O I：

10.1016/j.engfracmech.2024.110034

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This paper introduces a novel digital twin solution for unlocking the elasto-plastic fatigue crack growth within an S550 steel under negative load ratios. The digital twin transforms solely strain data from a strain-interfaced welded plate joint specimen to the load-displacement curve to compute cyclic J-integral values using the eta approach, eliminating the need for load and displacement measurements. The accurate computation of the elasto-plastic Delta J effectively extends the fatigue crack growth relationship derived from standard fracture specimens. The extended fatigue crack growth relationship accurately predicts the fatigue life of specimens under separate step-up and step-down variable amplitude loading regimes.

引用

页数：17

共 35 条

[31] Fatigue crack growth prediction under spectrum load in an aluminium alloy using crack driving force K*eff approach
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Sivaranjani T.
Badari Narayana K.
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International Journal of Vehicle Structures and Systems, 2020, 12 (03): : 358 - 362
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JONO, M
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Eguchi, Naoki
Zairyo/Journal of the Society of Materials Science, Japan, 1985, 34 (380) : 561 - 567
[34] Numerical investigation of mechanical behavior of crack tip under mode I and mixed-mode I-II fatigue loading at negative load ratios
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Zhou, Chang-yu
Xie, Lin-qi
He, Xiao-hua
THEORETICAL AND APPLIED FRACTURE MECHANICS, 2020, 108
[35] Development of Scaling Parameter SR for Negative Stress Ratios R Based on Trend in Experimental Data for Fatigue Crack Growth Rates of Austenitic Stainless Steels for ASME Code Section XI
Negyesi, Martin
Yamaguchi, Yoshihito
Hasegawa, Kunio
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Morley, Andrew
JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME, 2025, 147 (02):

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