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Full-Text Articles in Social and Behavioral Sciences
Wear Mode Map Evaluation Of Induction Hardened 4140 And Carburised 8617h Steels On 1040 Steel, Alain Kusmoko, Alan Crosky
Wear Mode Map Evaluation Of Induction Hardened 4140 And Carburised 8617h Steels On 1040 Steel, Alain Kusmoko, Alan Crosky
Faculty of Engineering and Information Sciences - Papers: Part A
This study was undertaken to evaluate the likely effect on the wear rate of changing the pinion material in a rack and pinion steering box from carburised SAE-AISI grade 8617 H steel to induction hardened SAE-AISI grade 4140 steel. Accordingly, pin-on-disc unlubricated wear tests were conducted using carburised 8617 H pins and through hardened 4140 pins. The surface hardness of the pins was approximately 60 HRC for both materials. The discs were made of SAE-AISI grade 1040 steel through hardened to a hardness of 45 HRC. The tests were conducted using a load of 2.2 kg and a rotational speed …
The Response Of Axially Restrained Non-Composite Steel-Concrete-Steel Sandwich Panels Due To Large Impact Loading, Alex M. Remennikov, Sih Ying Kong, Brian Uy
The Response Of Axially Restrained Non-Composite Steel-Concrete-Steel Sandwich Panels Due To Large Impact Loading, Alex M. Remennikov, Sih Ying Kong, Brian Uy
Faculty of Engineering and Information Sciences - Papers: Part A
In conventional steel-concrete-steel (SCS) construction, the external steel plates are connected to the concrete infill by welded shear stud connectors. This paper describes a programme of experimental and numerical investigations on reduced-scale non-composite SCS panels with axially restrained connections. The experimental results have demonstrated that the non-composite SCS panels are capable of developing enhanced load-carrying capacity through the tensile membrane resistance of the steel faceplates. This type of construction was found to exhibit highly ductile response and be able to sustain large end rotations of up to 18° without collapse. High fidelity finite element models for SCS panels under impact …
Development Of Safe Optimized Welding Procedures For High Strength Q&T Steel Welded With Austenitic Consumables, Lenka Kuzmikova, Huijun Li, John Norrish, Zengxi Stephen Pan, Nathan Larkin
Development Of Safe Optimized Welding Procedures For High Strength Q&T Steel Welded With Austenitic Consumables, Lenka Kuzmikova, Huijun Li, John Norrish, Zengxi Stephen Pan, Nathan Larkin
Faculty of Engineering and Information Sciences - Papers: Part A
High strength quenched and tempered (Q&T) steels offer obvious economic benefits originating from their advantageous strength to price and weight ratios. These steels are usually welded using ferritic consumables and for this combination the risk of hydrogen assisted cold cracking (HACC) is high. The use of austenitic stainless steel (ASS) consumables has great potential to significantly improve this issue. Yet, there are no guidelines for determination of safe level of preheat for welding ferritic steels with ASS consumables. For this reason manufacturers adopt this parameter from procedures developed for conventional ferritic consumables thus significantly limiting the benefits ASS consumables are …
Behavior Of Hybrid Frp-Concrete-Steel Double-Skin Tubular Columns With A Square Outer Tube And A Circular Innert Tube Subjected To Axial Compression, Tao Yu, J G. Teng
Behavior Of Hybrid Frp-Concrete-Steel Double-Skin Tubular Columns With A Square Outer Tube And A Circular Innert Tube Subjected To Axial Compression, Tao Yu, J G. Teng
Faculty of Engineering and Information Sciences - Papers: Part A
Hybrid fiber-reinforced polymer (FRP) concrete steel, double skin tubular columns (DSTCs) are a new form of hybrid columns. The most common sectional form of hybrid DSTCs consists of a layer of concrete sandwiched between a circular inner steel tube and a circular outer FRP tube whose fiber directions are close to the hoop detection to provide effective confinement to the concrete. Much recent research has been conducted on circular hybrid DSTCs, which has demonstrated that the combination of the three constituent materials leads to several advantages not available with existing forms of columns. In practical applications, for aesthetic and other …
Net Section Tension Capacity Of Cold-Reduced Sheet Steel Angle Braces Bolted At One Leg, Lip H. Teh, Benoit P. Gilbert
Net Section Tension Capacity Of Cold-Reduced Sheet Steel Angle Braces Bolted At One Leg, Lip H. Teh, Benoit P. Gilbert
Faculty of Engineering and Information Sciences - Papers: Part A
This paper examines the accuracy of equations specified by the North American and Australasian steel structures codes for determining the net section tension capacity of a cold-formed steel angle brace bolted at one leg. The configurations tested in the laboratory include single equal angle, single unequal angle bolted at the wider leg, single unequal angle bolted at the narrow leg, double angles, and alternate angles. The steel materials used in the experiment are among those with the lowest ductility for which nominal tensile strength is permitted by cold-formed steel design codes to be fully utilized in structural design calculations. Based …
Analysis Of Elemental Segregation In A Microalloyed Cast Steel, Jingwei Zhao, Zhengyi Jiang, Dongbin Wei
Analysis Of Elemental Segregation In A Microalloyed Cast Steel, Jingwei Zhao, Zhengyi Jiang, Dongbin Wei
Faculty of Engineering and Information Sciences - Papers: Part A
Quantitative investigation is made on the elemental segregation in different zones of a heavy microalloyed cast steel by energy dispersive X-ray spectroscopy. It is demonstrated that C shows serious segregation tendency than that of Mn and Si, and the degree of C segregation in the surface zone is higher than that in the central zone. C enrichment is generally observed at both dendrite arm and grain boundaries, and more C segregation at dendrite arm boundary in contrast to that at grain boundary is found in this steel. The distribution of C concentration shows a decreased trend from root to tip …
Shear Lag And Eccentricity Effects Of Bolted Connections In Cold-Formed Steel Sections, Lip H. Teh, Veysel Yazici
Shear Lag And Eccentricity Effects Of Bolted Connections In Cold-Formed Steel Sections, Lip H. Teh, Veysel Yazici
Faculty of Engineering and Information Sciences - Papers: Part A
This paper examines the "three factors" approach previously presented by the senior author for determining the net section efficiency of a bolted cold-formed steel open profile. One objective is to ascertain that the net section efficiency is governed by three factors: the in-plane shear lag associated with stress concentration around a bolt hole that is also present in a flat sheet, the out-of-plane shear lag that is also present in a bi-symmetric I-section bolted at the flanges only, and the bending moment arising from the connection eccentricity with respect to the neutral axis. This paper presents the test results of …
Effect Of Deformation Temperature On Niobium Clustering, Precipitation And Austenite Recrystallisation In A Nb-Ti Microalloyed Steel, Andrii G. Kostryzhev, Abdullah Al Alshahrani, Chen Zhu, Simon P. Ringer, Elena V. Pereloma
Effect Of Deformation Temperature On Niobium Clustering, Precipitation And Austenite Recrystallisation In A Nb-Ti Microalloyed Steel, Andrii G. Kostryzhev, Abdullah Al Alshahrani, Chen Zhu, Simon P. Ringer, Elena V. Pereloma
Faculty of Engineering and Information Sciences - Papers: Part A
The effect of deformation temperature on Nb solute clustering, precipitation and the kinetics of austenite recrystallisation were studied in a steel containing 0.081C–0.021Ti–0.064 Nb (wt%). Thermo-mechanical processing was carried out using a Gleeble 3500 simulator. The austenite microstructure was studied using a combination of optical microscopy, transmission electron microscopy, and atom probe microscopy, enabling a careful characterisation of grain size, as well as Nb-rich clustering and precipitation processes. A correlation between the austenite recrystallisation kinetics and the chemistry, size and number density of Nb-rich solute atom clusters, and NbTi(C,N) precipitates was established via the austenite deformation temperature. Specifically, we have …
Effect Of Austenitising And Deformation Temperatures On Dynamic Recrystallisation In Nb-Ti Microalloyed Steel, Andrii G. Kostryzhev, Abdullah Al Shahrani, Chen Zhu, Simon P. Ringer, Elena V. Pereloma
Effect Of Austenitising And Deformation Temperatures On Dynamic Recrystallisation In Nb-Ti Microalloyed Steel, Andrii G. Kostryzhev, Abdullah Al Shahrani, Chen Zhu, Simon P. Ringer, Elena V. Pereloma
Faculty of Engineering and Information Sciences - Papers: Part A
An investigation into influence of the austenitising temperature and the austenite deformation temperature on Nb precipitation and recrystallisation kinetics was carried out for a steel containing 0.081C-0.021Ti-0.064Nb (wt. %). The austenite grain structure was correlated to the dispersive properties of Nb atom clustering and precipitation. Irrespective of the austenitising temperature, deformation to 0.75 strain at 1075 °C produced a fully recrystallised microstructure. After deformation at 975 °C, only partial recrystallisation was observed in the samples austenitised at higher temperature, whereas samples austenitised at lower temperature were fully recrystallised. The influence of solute drag and particle pinning effects on the recrystallisation …
Ebsd Observations Of Recrystallisation And Tensile Deformation In Twinning Induced Plasticity Steel, Ahmed A. Saleh, Azdiar A. Gazder, Elena Pereloma
Ebsd Observations Of Recrystallisation And Tensile Deformation In Twinning Induced Plasticity Steel, Ahmed A. Saleh, Azdiar A. Gazder, Elena Pereloma
Faculty of Engineering and Information Sciences - Papers: Part A
The microstructure evolution of cold-rolled and isochronally annealed Fe-24Mn-3Al-2Si-1Ni-0.06C twinning induced plasticity steel was investigated by electron back-scattering diffraction (EBSD). Deformation behaviour of a fully recrystallised sample was tracked in a selected area as a function of the true strain using a combination of interrupted tensile testing and EBSD. The results show that the cold rolled microstructure contained a large fraction of primary and secondary twins as well as remnants of annealing twins carried over from the prior hot rolling stage. A novel deconstruction technique was applied to a partially recrystallised sample in order to separate the microstructure into deformed, …
Enhancing Impact Fracture Toughness And Tensile Properties Of A Microalloyed Cast Steel By Hot Forging And Post-Forging Heat Treatment Processes, Jingwei Zhao, Zhengyi Jiang, Chong Soo Lee
Enhancing Impact Fracture Toughness And Tensile Properties Of A Microalloyed Cast Steel By Hot Forging And Post-Forging Heat Treatment Processes, Jingwei Zhao, Zhengyi Jiang, Chong Soo Lee
Faculty of Engineering and Information Sciences - Papers: Part A
In the present work, the effects of hot forging and post-forging heat treatment on the impact fracture toughness and tensile properties of a microalloyed cast steel were investigated. Mechanical tests were used to evaluate the room temperature impact fracture toughness and tensile properties of the steel. The resulting microstructures were analysed by optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). The extraction replica technology was used to investigate the characterisation of complex precipitates formed during heat treatment. The obtained results showed that the coarse-grained microstructure of the forged specimen was significantly refined after post-forging heat treatment. …
Enhancing Mechanical Properties Of A Low-Carbon Microalloyed Cast Steel By Controlled Heat Treatment, Jingwei Zhao, Jeong Hun Lee, Yong Woo Kim, Zhengyi Jiang, Chong Soo Lee
Enhancing Mechanical Properties Of A Low-Carbon Microalloyed Cast Steel By Controlled Heat Treatment, Jingwei Zhao, Jeong Hun Lee, Yong Woo Kim, Zhengyi Jiang, Chong Soo Lee
Faculty of Engineering and Information Sciences - Papers: Part A
In the present work, detailed studies were made on the optimization of microstructure and mechanical properties of a low-carbon microalloyed cast steel through control of heat treatment conditions. Specimens were austenitized at temperatures ranging from 950 to 1200 °C for 2 h followed by different cooling methods (furnace, air and water). For analyzing the effect of holding time on mechanical properties, some cast specimens were austenitized at 1100 °C for different times followed by furnace cooling. After heat treatment, mechanical tests were employed to evaluate the room temperature Charpy impact and tensile properties. The characterization of complex precipitates formed during …
Tribological Properties Of Magnetite Precipitate From Oxide Scale In Hot-Rolled Microalloyed Steel, Xianglong Yu, Zhengyi Jiang, Dongbin Wei, Cunlong Zhou, Qingxue Huang, Daijun Yang
Tribological Properties Of Magnetite Precipitate From Oxide Scale In Hot-Rolled Microalloyed Steel, Xianglong Yu, Zhengyi Jiang, Dongbin Wei, Cunlong Zhou, Qingxue Huang, Daijun Yang
Faculty of Engineering and Information Sciences - Papers: Part A
Nano-magnetite (Fe3O4) particles have a potential to lead to the formation of lubrication tribofilm that reduces the friction and wear in hot steel strip rolling. In this paper, an attempt to fabricate the oxide film with magnetite precipitates from thermally-grown wustite (Fe1-xO) layer during isothermal cooling of low carbon microallyed steel, was obtained. The precipitation behaviors were investgated on Gleeble 3500 thermo-mechanical simulator under the humid air with water vaour content of 19.5 per vol percent. Several types of magnetite precipitates were examined using scanning electron microscope (SEM) with energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD) analysis. The tribological …
Towards Improved Steel Alloy Designs For Control Of Weld Heat Affected Zone Properties, F J. Barbaro, Z Zhu, L Kuzmikova, H Li, J M. Gray
Towards Improved Steel Alloy Designs For Control Of Weld Heat Affected Zone Properties, F J. Barbaro, Z Zhu, L Kuzmikova, H Li, J M. Gray
Faculty of Engineering and Information Sciences - Papers: Part A
This paper reviews the current technology related to control of weld HAZ properties in high strength steels. The debate related to appropriate balance of Ti and N is addressed and it appears that a stoichiometric ratio provides optimum fracture toughness. The results are significant because despite the well established difficulties in controlling Ti/N ratio, this data now provides guidance in terms of alloy design to achieve optimum fracture toughness in the HAZ of welds. The enhanced resistance to grain coarsening behaviour of high Nb steels has now provided another incremental improvement in the weldability of steels for critical applications such …
On The Evolution And Modelling Of Lattice Strains During The Cyclic Loading Of Twip Steel, Ahmed A. Saleh, Elena V. Pereloma, Bjorn Clausen, Donald W. Brown, Carlos N. Tome, Azdiar A. Gazder
On The Evolution And Modelling Of Lattice Strains During The Cyclic Loading Of Twip Steel, Ahmed A. Saleh, Elena V. Pereloma, Bjorn Clausen, Donald W. Brown, Carlos N. Tome, Azdiar A. Gazder
Faculty of Engineering and Information Sciences - Papers: Part A
The evolution of lattice strains in fully annealed Fe–24Mn–3Al–2Si–1Ni–0.06C twinning-induced plasticity (TWIP) steel is investigated via in situ neutron diffraction during cyclic (tension–compression) loading between strain limits of ±1%. The pronounced Bauschinger effect observed upon load reversal is accounted for by a combination of the intergranular residual stresses and the intragranular sources of back stress, such as dislocation pile-ups at the intersection of stacking faults. The recently modified elasto-plastic self-consistent (EPSC) model which empirically accounts for both intergranular and intragranular back stresses has been successfully used to simulate the macroscopic stress–strain response and the evolution of the lattice strains. The …
Work Hardening Behaviors Of A Low Carbon Nb-Microalloyed Si-Mn Quenching-Partitioning Steel With Different Cooling Styles After Partitioning, Jun Zhang, Hua Ding, Chao Wang, Jingwei Zhao, Ting Ding
Work Hardening Behaviors Of A Low Carbon Nb-Microalloyed Si-Mn Quenching-Partitioning Steel With Different Cooling Styles After Partitioning, Jun Zhang, Hua Ding, Chao Wang, Jingwei Zhao, Ting Ding
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, the strain hardening behaviors of a low carbon Nb-microalloyed Si–Mn quenching–partitioning (Q–P) steel were investigated. The microstructures were analyzed by the scanning electron microscope (SEM) and transmission electron microscope (TEM). Mechanical tests were used to evaluate the room temperature tensile properties of the steel. The work hardening behaviors of the tested specimens were analyzed using the Hollomon approach. The results showed that a two-stage work hardening behavior was observed during deformation processes. In the first stage, for the quenched samples, martensite deforms plastically and the hardening exponent decreased. For the air-cooled samples, however, the carbide-free ferrite deforms …
Microstructural Characterization Of P91 Steel In The Virgin, Service Exposed And Post-Service Re-Normalized Conditions, Huijun Li, David Mitchell
Microstructural Characterization Of P91 Steel In The Virgin, Service Exposed And Post-Service Re-Normalized Conditions, Huijun Li, David Mitchell
Faculty of Engineering and Information Sciences - Papers: Part A
P91 steel has been widely used in power generation industry. Generally, P91 creep resisting steel is produced by normalizing and tempering. The normalizing temperature is in the range of 1040–10808C and tempering temperature is in the range of 750–7808C. The microstructure after tempering is tempered martensite with precipitates of carbides, M23C6, and vanadium/niobium rich carbo‐nitride of the type MX (M ¼ V or Nb and X ¼ C or N). The presence of carbide precipitates improves creep rupture strength due to precipitation hardening. The carbide coarsening and microstructure degradation during service will result in deterioration in creep strength. It is …
The Influence Of Pallets On The Behaviour And Design Of Steel Drive-In Storage Racks - Part Ii Design, B P. Gilbert, L H. Teh, R X. Badet, K J. R Rasmussen
The Influence Of Pallets On The Behaviour And Design Of Steel Drive-In Storage Racks - Part Ii Design, B P. Gilbert, L H. Teh, R X. Badet, K J. R Rasmussen
Faculty of Engineering and Information Sciences - Papers: Part A
This paper analyses the influence of the horizontal restraints provided by pallets on the ultimate capacity of drive-in racks. The paper is based on the assumption that one can accurately determine the coefficient of friction between the rail beams and the pallets or can design a device that restrains the pallets from sliding on the rail beams. Thirty-six drive-in racks representing the global sale of an Australian manufacturer over three years are analysed for all possible loading scenarios. For the sake of computational efficiency, the simple 2D model introduced in the companion paper is used for the study. The load …
Block Shear Capacity Of Bolted Connections In Hot-Rolled Steel Plates, Lip H. Teh, Veysel Yazici
Block Shear Capacity Of Bolted Connections In Hot-Rolled Steel Plates, Lip H. Teh, Veysel Yazici
Faculty of Engineering and Information Sciences - Papers: Part A
This paper extends the research previously conducted at the University of Wollongong on block shear failure of bolted connections in cold-reduced steel sheets with low ductility to hot-rolled steel plates. It examines the applicability of the basic approach employed for cold-reduced sheet steel bolted connections, which makes use of the so-called active shear planes, to hot-rolled steel plate connections. The active shear planes lie midway between the gross and the net shear planes defined in the steel structures specifications. The paper shows that shear yielding leading to the block shear failure of a bolted connection in a hot-rolled steel gusset …
Deposition Of Stellite 6 On Nickel Superalloy And Mild Steel Substrates With Laser Cladding, Alain Kusmoko, Druce P. Dunne, Huijun Li, David J. Nolan
Deposition Of Stellite 6 On Nickel Superalloy And Mild Steel Substrates With Laser Cladding, Alain Kusmoko, Druce P. Dunne, Huijun Li, David J. Nolan
Faculty of Engineering and Information Sciences - Papers: Part A
Stellite 6 was deposited by laser cladding of two different steel substrates (nickel superalloy and mild steel). The chemical compositions and microstructures of these coatings were characterized by atomic absorption spectroscopy, optical microscopy and scanning electron microscopy. The microhardness of the coatings was measured and the wear mechanism of the coatings was examined using a pin-on-plate (reciprocating) wear testing machine. The results showed less cracking and pore development for Stellite 6 coatings applied to the mild steel (MS) substrate. Further, the Stellite coating on mild steel was significantly harder than that deposited on the superalloy. The wear test results showed …
Inclusion Reactivity: Morphology And Composition Changes Of Spinel (Mgal2o4) In Steel, Neslihan Dogan, Raymond Longbottom, Mark Henry Reid, Michael W. Chapman, Paton Wilson, Les Moore, Brian Monaghan
Inclusion Reactivity: Morphology And Composition Changes Of Spinel (Mgal2o4) In Steel, Neslihan Dogan, Raymond Longbottom, Mark Henry Reid, Michael W. Chapman, Paton Wilson, Les Moore, Brian Monaghan
Faculty of Engineering and Information Sciences - Papers: Part A
Due to an ever increasing demand for cleaner, high quality steels, there is an increasing push for steelmakers to lower the non-metallic inclusion contents of the steel they produce. Understanding inclusion reactivity in steel is key in producing high quality steels at high production rates. Our current knowledge in controlling and predicting inclusion development during liquid steel processing is limited. In this study, spinel (MgAI204) inclusions of close to stoichiometric MgO.AI2O3 and known size distribution where added to the liquid steel bath prior to assessing their reactivity. The pO2 of the gas phase was controlled to 10-13 atm throughout the …
Detection Of Crack Growth In Rail Steel Using Acoustic Emission, Andrii Kostryzhev, C L. Davis, C Roberts
Detection Of Crack Growth In Rail Steel Using Acoustic Emission, Andrii Kostryzhev, C L. Davis, C Roberts
Faculty of Engineering and Information Sciences - Papers: Part A
Increased traffic speeds and axle loads on modern railways enhance rail track degradation. To eliminate track failure due to rail defects, a condition monitoring system requires methods for the early detection of defects which grow in service. Acoustic emission (AE) monitoring is the only non-destructive technique which might be applied online to study the defect growth under traffic loading. However, a high level of traffic noise and a limited signal from crack growth, especially at low crack growth rates, significantly complicate the AE signal analysis. In the present work, the AE monitoring of rail steel fatigue was carried out in …
Effect Of Cooling Rate On Oxidation Behaviour Of Microalloyed Steel, Xianglong Yu, Zhengyi Jiang, Jingwei Zhao, Dongbin Wei, Cunlong Zhou
Effect Of Cooling Rate On Oxidation Behaviour Of Microalloyed Steel, Xianglong Yu, Zhengyi Jiang, Jingwei Zhao, Dongbin Wei, Cunlong Zhou
Faculty of Engineering and Information Sciences - Papers: Part A
Oxidation characteristics of a microalloyed low carbon steel were investigated by a hot rolling mill combined with acceleration cooling system over the cooling rate range from 20 to 70°C/s. The effects of cooling rate after hot rolling on microstructure and phase composition of oxide scale were examined. The results showed that the increase of the cooling rate has a significant influence on the decrease of the grain size and surface roughness of oxide scale. A higher cooling rate promotes the formation of retain wustite and primary magnetite precipitation while suppression of eutectoid α-iron precipitates. This provides the possibility to enhance …
The Influence Of Pallets On The Behaviour And Design Of Drive-In Steel Storage Racks - Part I: Behaviour, B P. Gilbert, L H. Teh, R X. Badet, K J. R Rasmussen
The Influence Of Pallets On The Behaviour And Design Of Drive-In Steel Storage Racks - Part I: Behaviour, B P. Gilbert, L H. Teh, R X. Badet, K J. R Rasmussen
Faculty of Engineering and Information Sciences - Papers: Part A
Drive-in steel storage racks represent a popular alternative to the more common selective racks when available space is restricted or when storing the same good. In drive-in racks, the forklift truck drives into the rack and stores the pallets on beam rails on the "first-in last-out" principle. Recent experimental studies have shown that by acting as horizontal ties between uprights, pallets significantly influence the structural behaviour of the rack. However, due to the uncertainty in the degree of friction between the rail beams and the pallets, current industry design practice does not consider this effect. This paper quantifies the influence …
Microstructure And Texture Evolution In A Twinning-Induced-Plasticity Steel During Uniaxial Tension, Ahmed A. Saleh, Elena V. Pereloma, Azdiar A. Gazder
Microstructure And Texture Evolution In A Twinning-Induced-Plasticity Steel During Uniaxial Tension, Ahmed A. Saleh, Elena V. Pereloma, Azdiar A. Gazder
Faculty of Engineering and Information Sciences - Papers: Part A
A combination of electron back-scattering diffraction and X-ray diffraction was used to track the evolution of the microstructure and texture of a fully recrystallized Fe-24 Mn-3 Al-2 Si-1 Ni-0.06 C twinning-induced-plasticity steel during interrupted uniaxial tensile testing. Texture measurements returned the characteristic double fibre texture for face-centred cubic materials, with a relatively stronger 〈1 1 1〉 and a weaker 〈1 0 0〉 partial fibre parallel to the tensile axis. The interaction with the stable 〈1 1 1〉 oriented grains results in preferential plastic flow in the unstable 〈1 1 0〉 oriented grains. Consequently, the grains oriented along the 〈1 1 …
Net Section Tension Capacity Of Cold-Reduced Sheet Steel Channel Braces Bolted At The Web, Lip H. Teh, Benoit P. Gilbert
Net Section Tension Capacity Of Cold-Reduced Sheet Steel Channel Braces Bolted At The Web, Lip H. Teh, Benoit P. Gilbert
Faculty of Engineering and Information Sciences - Papers: Part A
This paper examines the accuracy of equations specified by the North American and Australasian steel structures codes for determining the net section tension capacity of a channel brace. It points out that there are three distinct factors affecting the net section efficiency of a cold-formed steel channel brace bolted at the web. These factors are the in-plane shear lag associated with stress concentration around a bolt hole that is also present in flat sheets, the out-of-plane shear lag that is also present in an I-section bolted at the flanges only, and the bending moment arising from the connection eccentricity with …
Process Design Strategies For Producing Heavy Section Steel With Improved Quality, Jingwei Zhao, Zhengyi Jiang, Dongbin Wei, Chong Soo Lee
Process Design Strategies For Producing Heavy Section Steel With Improved Quality, Jingwei Zhao, Zhengyi Jiang, Dongbin Wei, Chong Soo Lee
Faculty of Engineering and Information Sciences - Papers: Part A
Uniformity of microstructure and mechanical properties is required for the heavy section steel. In the present work, a heavy section wind tower flange was manufactured by controlled ring-rolling. Post-rolling heat treatment was employed to optimize the microstructure and mechanical properties. The chemical composition, microstructure and mechanical properties in different zones of the flange were investigated. The results showed that the chemical composition and microstructure were uniformly distributed in the flange. The tensile strength showed similar values in different sampling locations. The strain and impact energies of specimens prepared along the longitudinal direction were higher than that prepared along both the …
Confinement Effect Of Frp And Transverse Steel On Retrofitting Square Concrete Columns, Le V. Doan, Xu Lei, Muhammad N. S Hadi, Thong M. Pham
Confinement Effect Of Frp And Transverse Steel On Retrofitting Square Concrete Columns, Le V. Doan, Xu Lei, Muhammad N. S Hadi, Thong M. Pham
Faculty of Engineering and Information Sciences - Papers: Part A
This study presents an experimental investigation into strain distribution of Fibre-Reinforced Polymer (FRP) in FRP-confined concrete columns with internal steel reinforcement under concentric and eccentric loading conditions. A total of nine reinforced concrete columns were cast and tested. Three of them were square in cross-section while the others were originally square but were shape-modified into circular columns with four pieces of segmental circular concrete covers and confined with three layers of CFRP. The nominal compressive strength of the segmental concrete covers was 40 MPa and 80 MPa. All columns were tested under concentric load, 25 mm or 50 mm eccentric …