Damage Model Calibration for S275 and S690 Steels

Yang, Fei; Veljković, Milan

doi:10.1002/cepa.1201

Cited by 8 publications

(5 citation statements)

References 11 publications

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“…Therefore, the range of validity for the weighting factor W in Equation (3) was defined in the range between 0 and 1. However, in the recent study on the post-necking true stress of high-strength steels, it was found that using the power low of Equation ( 5) would overestimate the post-necking stress [33,34]. Therefore, the power law should not be subjectively considered as the lower bound to describe the post-necking true stress.…”

Section: Full-range True Stress-strain Relationsmentioning

confidence: 99%

Plasticity and Ductile Fracture of High-Strength Steel Center-Holed Plates under Tension

Tian

Yang

Wang

et al. 2023

Metals

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The mechanical behavior of bolted connections in high-strength (HS) steel structures is a matter of concern, since the less ductility compared to mild steels may affect the load transfer and stress distribution of bolted connections. Conducting advanced finite element (FE) analysis incorporating validated material plasticity and ductile fracture criterion allows for a deeper understanding for the load transfer mechanism of HS steel joints. This paper focused on the plasticity and ductile fracture behaviors of HS (S700MC and S960Q) center-holed (CH) plates under tension, which are the essential component in bolted connections. Firstly, a combined linear and power law was used to calibrate and describe the post-necking stress–strain relations of the investigated HS steels. Then, a void-growth-model based on Rice–Tracey criterion was used to simulate the ductile fracture of five groups of CH plates with different hole diameters. The tensile strength and deformation capacity of the CH plates were discussed. The results showed that S700MC had a strain-hardening plasticity until the tensile fracture, while S960Q had a strain-hardening plasticity with a strain-softening behavior followed near the tensile fracture. Incorporating the calibrated plasticity and ductile fracture criterion in FE analyses generated close force-displacement curves as the experimental results. The equation specified in Eurocode produced conservative predictions for the net cross-sectional tensile strength of the investigated HS steels.

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Section: Full-range True Stress-strain Relationsmentioning

confidence: 99%

Plasticity and Ductile Fracture of High-Strength Steel Center-Holed Plates under Tension

Tian

Yang

Wang

et al. 2023

Metals

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“…( 16). Yang and Veljkovic [17,18] extended the combined linear and power stress-strain law to describe the post-necking stress-strain relationships of high-strength steels with weighting factor less than zero:…”

Section: Tablementioning

confidence: 99%

Validation and application of bearing and block tearing resistance; background to prEN1993-1-8:2021

Može

Yang

Veljković

2021

Journal of Constructional Steel Research

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“…Full-range true stress-strain curves for high-strength steels have been investigated in [30,31]. The pre-necking true stress-strain can be obtained by converting equations between engineering stress-strain and true stress-strain, as shown in Eqs.…”

Section: Materials Behavioursmentioning

confidence: 99%

Fracture simulation of a demountable steel-concrete bolted connector in push-out tests

Yang

Liu

Xin

et al. 2021

Engineering Structures

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Many bolted connectors were proposed for use in steel-concrete composite structures over the past few decades. This is because using bolted connectors could make the assembly and disassembly of steel-concrete composite structures more convenient and reusing the dismantled structural components could also improve structural sustainability. Lots of static and fatigue experimental tests on steel-concrete bolted connectors were conducted but detailed finite element simulations including fracture of bolted connectors were rarely reported. This paper presents a series of simulations of a demountable steel-concrete bolted connector in push-out tests, which was proposed and reported by the authors of this paper before. Damage models of bolt and concrete materials are incorporated in the simulations to better understand the behaviour of the bolted connector and the failure mode of the push-out tests. Direct tension tests on bolts are simulated to calibrate the stress-strain relationship of bolt material and assumed pure shear tests on bolts are modelled to validate the fracture criterion used in the simulations. Results of modelling push-out tests indicate that the friction force at the steel-concrete interface accounts for a part of shear resistance of the bolted connector in push-out tests conducted. The load-slip curves and the fracture of bolts in push-out tests can be approximately predicted by incorporating damage models of bolt and concrete materials and considering an appropriate friction coefficient. The effects of concrete damage model, clearance in bolt hole, and pretension of short bolt on the shear performance of the bolted connector are discussed at last.

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Damage Model Calibration for S275 and S690 Steels

Cited by 8 publications

References 11 publications

Plasticity and Ductile Fracture of High-Strength Steel Center-Holed Plates under Tension

Plasticity and Ductile Fracture of High-Strength Steel Center-Holed Plates under Tension

Validation and application of bearing and block tearing resistance; background to prEN1993-1-8:2021

Fracture simulation of a demountable steel-concrete bolted connector in push-out tests

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