2022
DOI: 10.3390/ma15051663
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A Simplified Ductile Fracture Model for Predicting Ultra-Low Cycle Fatigue of Structural Steels

Abstract: Under strong earthquakes, steel structures are prone to undergoing ultra-low cycle fatigue (ULCF) fracture after sustaining cyclic large-strain loading, leading to severe earthquake-induced damage. Thus, establishing a prediction method for ULCF plays a significant role in the seismic design of steel structures. However, a simple and feasible model for predicting the ULCF life of steel structures has not been recognized yet. Among existing models, the ductile fracture model based on ductility capacity consumpt… Show more

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Cited by 7 publications
(3 citation statements)
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“…The GTN model can characterize the nucleation, growth, and merging of voids, but this model has more than 10 parameters to determine a single material, which is difficult in practical applications [67,68]. Coupled models are more reasonable considering the material degradation caused by pore growth and agglomeration, which can more accurately predict the ductile fracture of materials [69].…”
Section: The Summary Of This Sectionmentioning
confidence: 99%
“…The GTN model can characterize the nucleation, growth, and merging of voids, but this model has more than 10 parameters to determine a single material, which is difficult in practical applications [67,68]. Coupled models are more reasonable considering the material degradation caused by pore growth and agglomeration, which can more accurately predict the ductile fracture of materials [69].…”
Section: The Summary Of This Sectionmentioning
confidence: 99%
“…However, with the exploitation of oil and gas expanding into seismic and permafrost regions, pipelines are more vulnerable to cyclic loads with a large strain amplitude [15][16][17]. Under such conditions, pipes may undergo large plastic deformation and fail in extremely Metals 2023, 13, 1238 2 of 16 low cycles (N f < 100), which is also called extremely low cycle fatigue (ELCF) [18][19][20][21]. The fracture behavior of the ELCF shows significant difference to that of general LCF.…”
Section: Introductionmentioning
confidence: 99%
“…Several ELCF models have been proposed according to the empirical or physically based ductile fracture models [20,[43][44][45]. The Mohr-Coulomb ductile fracture model was extended to predict ELCF fracture by introducing two weight functions [46].…”
Section: Introductionmentioning
confidence: 99%