Ductile damage model calibration for high-strength structural steels

Yang, Fei; Veljković, Milan; Liu, Yuqing

doi:10.1016/j.conbuildmat.2020.120632

Cited by 54 publications

(16 citation statements)

References 32 publications

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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%

“…The post-necking true stress-strain diagram for high-strength steels including bolts can be approximately described using combined linear and power stress-strain law [31]. According to the recent investigation on bolts under tensile loading [22], it indicates that the post-necking true stress-strain diagram for bolts can be described using the power stress-strain law, as shown in Eq.…”

Section: Materials Behavioursmentioning

confidence: 99%

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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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Section: Materials Behavioursmentioning

confidence: 99%

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…A D = 1 condition characterizes the material failure. Often, in finite element analyses, a threshold value c D < 1 is used (e.g., [49][50][51]) to indicate the formation of a crack, or the material failure, in order to avoid numerical problems such as damage localization or convergence issues. These aspects are discussed later.…”

Section: Damage Preliminaries and Characterization Of The Stress Statementioning

confidence: 99%

Ductile fracture modeling of metallic materials: a short review

Fincato

Tsutsumi

2021

Frattura Ed Integrità Strutturale

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Since the end of the last century a lot of research on ductile damaging and fracture process has been carried out. The interest and the attention on the topic are due to several aspects. The margin to reduce the costs of production or maintenance can be still improved by a better knowledge of the ductile failure, leading to the necessity to overcome traditional approaches. New materials or technologies introduced in the industrial market require new strategies and approaches to model the metal behavior. In particular, the increase of the computational power together with the use of finite elements (FE), extended finite elements (X-FE), discrete elements (DE) methods need the formulation of constitutive models capable of describing accurately the physical phenomenon of the damaging process. Therefore, the recent development of novel constitutive models and damage criteria. This work offers an overview on the current state of the art in non-linear deformation and damaging process reviewing the main constitutive models and their numerical applications.

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“…The point of rupture is given by the fracture strain, which is assumed to be 0.05 [35]. The shear stress ratio was assumed to be 0.6, for a typical high-strength ductile metal [36].…”

Section: Fibre-reinforced Polymer (Frp) Columnmentioning

confidence: 99%

Numerically Evaluation of FRP-Strengthened Members under Dynamic Impact Loading

et al. 2020

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Reinforced concrete (RC) members in critical structures, such as bridge piers, high-rise buildings, and offshore facilities, are vulnerable to impact loads throughout their service life. For example, vehicle collisions, accidental loading, or unpredicted attacks could occur. The numerical models presented in this paper are shown to adequately replicate the impact behaviour and damage process of fibre-reinforced polymer (FRP)-strengthened concrete-filled steel tube (CFST) columns and Reinforced Concrete slabs. Validated models are developed using Abaqus/Explicit by reproducing the results obtained from experimental testing on bare CFST and RC slab members. Parameters relating to the FRP and material components are investigated to determine the influence on structural behaviour. The innovative method of using the dissipated energy approach for structural evaluation provides an assessment of the effective use of FRP and material properties to enhance the dynamic response. The outcome of the evaluation, including the geometrical, material, and contact properties modelling, shows that there is an agreement between the numerical and experimental behaviour of the selected concrete members. The experimentation shows that the calibration of the models is a crucial task, which was considered and resulted in matching the force–displacement behaviour and achieving the same maximum impact force and displacement values. Different novel and complicated Finite Element Models were comprehensively developed. The developed numerical models could precisely predict both local and global structural responses in the different reinforced concrete members. The application of the current numerical techniques can be extended to design structural members where there are no reliable practical guidelines on both national and international levels.

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Ductile damage model calibration for high-strength structural steels

Cited by 54 publications

References 32 publications

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

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

Ductile fracture modeling of metallic materials: a short review

Numerically Evaluation of FRP-Strengthened Members under Dynamic Impact Loading

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