Study on cyclic constitutive model and ultra low cycle fracture prediction model of duplex stainless steel

Chang, Xiaolin; Liu, Yang; Zong, Liang; Zhao, Menghan; Yin, Fanglong

doi:10.1016/j.jcsr.2018.05.001

Cited by 45 publications

(7 citation statements)

References 20 publications

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“…Both austenitic and duplex stainless steels exhibit exceptional ductility under monotonic loading. When subjected to cyclic loading, stainless steel undergoes mechanical behaviour that differs markedly from that under monotonic loading [18,19]. The hysteresis curve for stainless steel shows that cyclic hardening initiates when the material reaches its yield point.…”

Section: Stainless Steelmentioning

confidence: 99%

Design fundamentals of demountable steel structures: from materials to members

Fan,

Yang,

Liu

2023

ce papers

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The impact of greenhouse gas emissions, especially CO2 emissions, on the global environment is receiving more and more attention. Most countries around the world had reached a consensus to reduce carbon emissions after holding a series of climate conferences. In 2021, the buildings and construction sector accounted for around 37% of energy and process‐related CO2 emissions globally. To mitigate the CO2 emissions produced by the construction industry, the application of demountable steel structures that can be reused is a viable solution. This study investigated the design fundamentals of demountable steel structures that aims to reduce carbon emissions by reusing the main components of the steel structure. In this paper, the demountable reusability performance parameter γd of steel members is proposed and used for the reusable performance design of demountable steel members. An overview of the mechanical properties of steel materials under static and cyclic loading are presented as a basis for the reuse of steel structures. A brief review of existing forms of demountable steel connection joints is presented and the feasibility of reuse of demountable steel systems is explored.

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Section: Stainless Steelmentioning

confidence: 99%

Design fundamentals of demountable steel structures: from materials to members

Fan,

Yang,

Liu

2023

ce papers

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“…They then proposed amendments for the prediction of model constitutive parameters. Under cyclic loading, the hysteresis loop of stainless steel material is plump and stable, indicating a fine hysteresis behavior; further, the cyclic skeleton curve is different from the monotonic tensile curve tension, showing an obvious strain hardening phenomenon [7][8][9]. In addition, it has been revealed that the cyclic hardening characteristics are greatly affected by plastic strain amplitude as well as the loading process.…”

Section: Introductionmentioning

confidence: 99%

Low-Cycle Fatigue Properties of Austenitic Stainless Steel S30408 Under Large Plastic Strain Amplitude

2022

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The application of stainless steel materials in civil structures for seismic protection lies in its low-cycle fatigue characteristic. However, the data of existing research are mainly based on the low-cycle fatigue in small strain amplitudes. To this end, we perform low-cycle fatigue testing of Austenitic stainless steel S30408, which has low yield point and good elongation performance, under the cyclic load with a maximum strain amplitude reaching up to 5%, to fill the gap. The stress-strain response characteristics of the stainless steel material under the cyclic load are analyzed; then, the parameters of the strain-fatigue life relationship and the cyclic-plastic constitutive model used for FEA simulation are extracted. Results show that the stainless steel’s stress-strain curve is nonlinear without a yield plateau, thus presenting a high strength yield ratio and ductility. The hysteresis loops of the material are plump with a shuttle shape and are symmetric to the origin, indicating a fine energy dissipation capacity. The skeleton curve under cyclic loading with cyclic hardening can be significantly reflected by the Ramberg Osgood model, which is affected by the strain amplitude and loading history; it is also different from the monotonic tensile skeleton curve. The strain-fatigue life curve fitted by the Baqusin Manson Coffin model can predict the materials’ fatigue life under different strain amplitudes. The mixed hardening model, including isotropic and kinematic hardening, based on the Chaboche model, is able to simulate the cyclic stress-strain relationship. Further, its parameters can provide basic data information for the seismic design of civil structures when Austenitic stainless steel S30408 is used.

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“…Normally, when a violent earthquake occurs, its tremendous destructive force will cause a devastating blow to the safety of people’s lives and property, and reinforced concrete structures are often subjected to enormous cyclic loading forces. This action effect is often characterized by short duration and a small number of cyclic loads, and significant plastic deformation will take place [ 1 , 2 ], causing great damage to the structure in a short time. On the one hand, When the structure is subjected to a low cyclic load after the protective layer of concrete has been peeled away, it is easy for rebar to fracture at an early stage, which will cause the column to lose its lateral bearing capacity and result in structural collapse [ 3 ]; however, on the other hand, rebar buckling is also the primary failure mode of reinforced concrete structures under seismic action, which plays an essential role in the seismic resistance of the structure [ 4 , 5 , 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Research on Hysteretic Behavior of FRP-Confined Concrete Core-Encased Rebar

Mou

Wang

et al. 2023

Polymers

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FRP-confined concrete core-encased rebar (FCCC-R) is a novel composite structure that has recently been proposed to effectively delay the buckling of ordinary rebar and enhance its mechanical properties by utilizing high-strength mortar or concrete and an FRP strip to confine the core. The purpose of this study was to study the hysteretic behavior of FCCC-R specimens under cyclic loading. Different cyclic loading systems were applied to the specimens and the resulting test data were analyzed and compared, in addition to revealing the mechanism of elongation and mechanical properties of the specimens under the different loading systems. Furthermore, finite-element simulation was performed for different FCCC-Rs using the ABAQUS software. The finite-element model was also used for the expansion parameter studies to analyze the effects of different influencing factors, including the different winding layers, winding angles of the GFRP strips, and the rebar-position eccentricity, on the hysteretic properties of FCCC-R. The test result indicates that FCCC-R exhibits superior hysteretic properties in terms of maximum compressive bearing capacity, maximum strain value, fracture stress, and envelope area of the hysteresis loop when compared to ordinary rebar. The hysteretic performance of FCCC-R increases as the slenderness ratio is increased from 10.9 to 24.5 and the constraint diameter is increased from 30 mm to 50 mm, respectively. Under the two cyclic loading systems, the elongation of the FCCC-R specimens is greater than that of ordinary rebar specimens with the same slenderness ratio. For different slenderness ratios, the range of maximum elongation improvement is about 10% to 25%, though there is still a large discrepancy compared to the elongation of ordinary rebar under monotonic tension. Despite the maximum compressive bearing capacity of FCCC-R is improved under cyclic loading, the internal rebars are more prone to buckling. The results of the finite-element simulation are in good agreement with the experimental results. According to the study of expansion parameters, it is found that the hysteretic properties of FCCC-R increase as the number of winding layers (one, three, and five layers) and winding angles (30°, 45°, and 60°) in the GFRP strips increase, while they decrease as the rebar-position eccentricity (0.15, 0.22, and 0.30) increases.

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Study on cyclic constitutive model and ultra low cycle fracture prediction model of duplex stainless steel

Cited by 45 publications

References 20 publications

Design fundamentals of demountable steel structures: from materials to members

Design fundamentals of demountable steel structures: from materials to members

Low-Cycle Fatigue Properties of Austenitic Stainless Steel S30408 Under Large Plastic Strain Amplitude

Research on Hysteretic Behavior of FRP-Confined Concrete Core-Encased Rebar

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