Helium Tribology of Inconel 617 at Elevated Temperatures up to 950°C: Parametric Study

2019 ◽  
Vol 193 (9) ◽  
pp. 998-1012 ◽  
Author(s):  
Md Saifur Rahman ◽  
Jie Ding ◽  
Ali Beheshti ◽  
Xinghang Zhang ◽  
Andreas A. Polycarpou
Keyword(s):  
Parametric Study ◽  
Elevated Temperatures ◽  
Inconel 617

Performance of RC T-Beams Externally Strengthened with CFRP Laminates under Elevated Temperatures

2014 ◽  
Vol 5 (1) ◽  
pp. 1-24 ◽  
Author(s):  
Mohannad Naser ◽  
Rami Hawileh ◽  
Hayder Rasheed
Keyword(s):  
Parametric Study ◽  
Elevated Temperatures ◽  
Numerical Study ◽  
Experimental Testing ◽  
Fe Model ◽  
Cfrp Laminates ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Efficient Alternative ◽  
Fire Loading

This paper presents a numerical study that investigates the performance of reinforced concrete (RC) T-beams externally strengthened with carbon fibre reinforced polymer (CFRP) plates when subjected to fire loading. A finite element (FE) model is developed and a coupled thermal-stress analysis was performed on a RC beam externally strengthened with a CFRP plate tested by other investigators. The spread of temperature at the CFRP-concrete interface and reinforcing steel, as well as the mid-span deflection response is compared to the measured experimental data. Overall, good agreement between the measured and predicted data is observed. The validated model was then used in an extensive parametric study to further investigate the effect of several parameters on the performance of CFRP externally strengthened RC beams under elevated temperatures. The variables of the parametric study include applying different fire curves and scenarios, different applied live load combinations as well as the effect of using different insulation schemes with different types and thicknesses. Several observations and conclusions were drawn from the parametric investigation. It could be concluded that successful FE modeling of this structural member when exposed to thermal and mechanical loading would provide a valid economical and efficient alternative solution to the expensive and time consuming experimental testing.

scholarly journals BEHAVIOUR OF MINERAL WOOL SANDWICH PANELS UNDER BENDING LOAD AT ROOM AND ELEVATED TEMPERATURES

2020 ◽  
Vol 12 (1) ◽  
pp. 25-31
Author(s):  
Ashkan Shoushtarian Mofrad ◽  
Hartmut Pasternak
Keyword(s):  
Parametric Study ◽  
Elevated Temperatures ◽  
Sandwich Panels ◽  
Mineral Wool ◽  
Bending Stiffness ◽  
Experimental Results ◽  
Fe Model ◽  
Analysis And Design ◽  
Bending Load ◽  
Panel Thickness

This paper presents a parametric study for the bending stiffness of mineral wool (MW) sandwich panels subjected to a bending load. The MW panels are commonly used as wall panels for industrial buildings. They provide excellent insulation in the case of fire. In this research, the performance of sandwich panels is investigated at both ambient and elevated temperatures. To reach that goal, a finite element (FE) model is developed to verify simulations with experimental results in normal conditions and fire case. The experimental investigation in the current paper is a part of STABFI project financed by Research Fund for Coal and Steel (RFCS). The numerical study is conducted using ABAQUS software. Employing simulations for analysis and design is an alternative to costly tests. However, in order to rely on numerical results, simulations must be verified with the experimental results. In this paper, after the verification of FE results, a parametric study is conducted to observe the effects of the panel thickness, length and width, as well as the facing thickness on the bending stiffness of MW sandwich panels at normal conditions. The results indicate that the panel thickness has the most significant effect on the bending stiffness of sandwich panels.

scholarly journals FINITE ELEMENT ANALYSIS OF UNFASTENED COLD-FORMED STEEL CHANNEL SECTIONS WITH WEB HOLES UNDER END-TWO-FLANGE LOADING AT ELEVATED TEMPERATURES

2021 ◽  
Keyword(s):  
Finite Element ◽  
Parametric Study ◽  
Elevated Temperatures ◽  
Strain Curve ◽  
Reduction Factor ◽  
Strength Reduction Factor ◽  
Element Analysis ◽  
Study Results ◽  
Cold Formed Steel ◽  
Factor Equation

This paper presents the results of a finite element investigation on cold-formed steel (CFS) channel sections with circular web holes under end-two-flange (ETF) loading condition and subjected to elevated temperatures. The stress strain curve for G250 CFS with 1.95 mm thickness at elevated temperatures was taken from Kankanamge and Mahendran and the temperatures were considered up to 700 oC. To analyse the effect of web hole size and bearing length on the strength of such sections at elevated temperatures, a parametric study involving a total of 288 FE models was performed. The parametric study results were then used to assess the applicability of the strength reduction factor equation presented by Uzzaman et al. for CFS channel-sections with web holes under ETF loading from ambient temperature to elevated temperatures. It is shown that the reduction factor equation is safe and reliable at elevated temperatures.

In-situ friction and fretting wear measurements of Inconel 617 at elevated temperatures

Wear ◽  
2018 ◽  
Vol 410-411 ◽  
pp. 110-118 ◽  
Author(s):  
Arman Ahmadi ◽  
Farshid Sadeghi ◽  
Steve Shaffer
Keyword(s):  
Elevated Temperatures ◽  
Fretting Wear ◽  
Inconel 617

Naturally Occurring High-Chloride Coal and Superheater Corrosion—A Laboratory Study

1982 ◽  
Vol 104 (4) ◽  
pp. 874-884 ◽  
Author(s):  
A. L. Plumley ◽  
W. R. Roczniak
Keyword(s):  
Bituminous Coal ◽  
Elevated Temperatures ◽  
Field Tests ◽  
Combustion Products ◽  
Fireside Corrosion ◽  
Naturally Occurring ◽  
Alloy 690 ◽  
Inconel 617 ◽  
Tp 310 ◽  
High Chloride

DOE Provided funds for C-E to investigate the fireside corrosion potential of commercial boiler tube alloys at elevated temperatures when exposed to the combustion products from a series of coals. The results of the laboratory and field tests were previously reported. In a supplementary phase of the program, C-E tested for the effect of chloride on similar alloys while firing a naturally occurring high chloride Midwestern bituminous coal in the same laboratory furnace. On the basis of exposure in the convection pass at temperatures from 1100–1700°F, Inconel Alloy 690 was found to have very good resistance to corrosion while Incoloy 800H and Tp-310 s. s. were good transitional materials. Poor materials were T-22, 316 s. s., Inconel 617, and Inconel 671.

Influence of Al on the High Temperature Corrosion Behaviour of Inconel 617 in VHTR Primary Coolant Atmosphere

2008 ◽  
Vol 595-598 ◽  
pp. 491-500 ◽  
Author(s):  
Jerome Chapovaloff ◽  
Gouenou Girardin ◽  
Damien Kaczorowski ◽  
Krzysztof Wolski ◽  
Michèle Pijolat
Keyword(s):  
High Temperature ◽  
Elevated Temperatures ◽  
Corrosion Behaviour ◽  
High Temperature Corrosion ◽  
Primary Coolant ◽  
Inconel 617

Due to the specific in service VHTR conditions, the corrosion behaviour of Inconel 617, candidate alloy for the IHX design, has been investigated at elevated temperatures in representative helium containing impurities (CO, H2O, H2 and CH4) in the range of 'bar. The role of Al in the corrosion behaviour of IN617 is investigated using Ni-22Cr-9Mo base model alloys containing different Al levels (from 0 to 2wt.%).

scholarly journals Numerical Study on The Structural Behavior of RC Beams after Exposure to Elevated Temperature

2019 ◽  
Vol 12 (4) ◽  
Author(s):  
Sajida Kadhem Al-Jasmi ◽  
Haitham Al-Thairy
Keyword(s):  
Elevated Temperature ◽  
Numerical Model ◽  
Heating Rate ◽  
Parametric Study ◽  
Elevated Temperatures ◽  
Numerical Study ◽  
Beam Model ◽  
Rc Beam ◽  
Rc Beams ◽  
Study Results

This paper presents a numerical simulation of the structural response of reinforced concrete (RC) beams under elevated temperature using the commercial finite element package ABAQUS. A numerical model is firstly suggested by selecting the appropriate geometrical and material properties of the RC beam model at elevated temperature. Thereafter, the suggested numerical model was validated against the experimental tests conducted in this study. The validation results in terms of temperatures- time histories; load-mid span deflection of the RC beams have confirmed the accuracy of the suggested numerical model. The validated numerical model was implemented in conducting a parametric study to investigate the effects of two important parameters on the behavior and failure of RC beams under elevated temperature. These parameters are the effect of the high ranges of elevated temperatures; and the effect of heating rate. The parametric study results have revealed that the failure load and the ductility of RC beams under elevated temperature are not considerably influenced by changing the heating rate. It has also been concluded that the ultimate load capacities of RC beams have considerably decreased by 55.49%, 74.72%, and 81.31% comparing with the control RC beam when they exposed to temperature values of 600 ºC, 700 ºC, and 800ºC respectively. These conclusions may be used in the design of RC beams subjected to fire induced temperature. Numerical model

Investigation on the Behaviour of a Composite Floor Made of Cellular Beams in Fire Situation

2014 ◽  
Vol 5 (2) ◽  
pp. 175-188
Author(s):  
Gisèle Bihina ◽  
Bin Zhao ◽  
Abdelhamid Bouchaïr
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Parametric Study ◽  
Elevated Temperatures ◽  
Mechanical Load ◽  
Element Model ◽  
Resistance Rate ◽  
Natural Fire ◽  
In Fire ◽  
The Finite Element Model

The main results from a numerical investigation on a composite floor made of cellular beams at elevated temperatures are presented. From a full-scale natural fire test, a 3D finite element model has been developed under ANSYS code to simulate the thermo-mechanical behaviour of a composite floor with cellular beams. The calibration of this numerical model is based on the measured material properties and temperatures. A good correlation between the test and the numerical simulation is observed, in terms of temperatures, deformed shape and deflections. The finite element model is then used in a parametric study varying bay size, mechanical load and fire resistance rate. The results from this parametric study are compared to those from an analytical method, highlighting the conservativeness of the latter.

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