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Full-Text Articles in Science and Technology Studies
Experimental And Numerical Investigations Of Eccentrically Loaded Rectangular Concrete-Filled Double Steel Tubular Columns, Mizen Ahmed, Qing Quan Liang, Vipulkumar I. Patel, Muhammad N. S Hadi
Experimental And Numerical Investigations Of Eccentrically Loaded Rectangular Concrete-Filled Double Steel Tubular Columns, Mizen Ahmed, Qing Quan Liang, Vipulkumar I. Patel, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part B
Rectangular concrete-filled double steel tubular (CFDST) columns have increasingly been utilized in high-rise buildings to support heavy loads. However, the responses of eccentrically loaded rectangular CFDST short columns have rarely been studied. This paper reports experimental and numerical investigations into the behavior of rectangular thin-walled short CFDST columns composed of a rectangular inner steel tube loaded eccentrically. Tests on rectangular and square CFDST short columns under eccentric loading and axial loading were carried out to examine their responses to various design parameters, including the cross-sectional dimensions, loading eccentricity, and width-to-thickness ratios of the external and internal tubes. The experimental program …
Experimental Investigation And Modeling Of The Transformation Of Illicit Drugs In A Pilot-Scale Sewer System, Jiaying Li, Jianfa Gao, Phong K. Thai, Adam Shypanski, Ludwika Nieradzik, Jochen F. Mueller, Zhiguo Yuan, Guangming Jiang
Experimental Investigation And Modeling Of The Transformation Of Illicit Drugs In A Pilot-Scale Sewer System, Jiaying Li, Jianfa Gao, Phong K. Thai, Adam Shypanski, Ludwika Nieradzik, Jochen F. Mueller, Zhiguo Yuan, Guangming Jiang
Faculty of Engineering and Information Sciences - Papers: Part B
In-sewer stability of illicit drug biomarkers has been evaluated by several reactor-based studies, but less has beendone in sewer pipes. Experiments conducted in sewer pipes have advantages over lab-scale reactors in providing more realisticbiomarker stability due to theflow and biological dynamics. This study assessed the transportation and transformation of sevenillicit drug biomarker compounds in a pilot-scale rising main and a gravity sewer pipe. Biomarkers presented diverse stabilitypatterns in the pilot sewers, based on which a drug transformation model was calibrated. This model was subsequently validatedusing transformation data sets from the literature, aiming to demonstrate the predictability of the pilot-based transformationcoefficients …
Experimental Evaluation Of Tensile Strength Test Methods For Steel Fibre-Reinforced Concrete, Hussam A. Goaiz, Nabeel Farhan, M Neaz Sheikh, Tao Yu, Muhammad N. S Hadi
Experimental Evaluation Of Tensile Strength Test Methods For Steel Fibre-Reinforced Concrete, Hussam A. Goaiz, Nabeel Farhan, M Neaz Sheikh, Tao Yu, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part B
This study presents an experimental evaluation of three different methods for determining the tensile strength of steel fibre reinforced concrete (SFRC). The test methods include the splitting test (ST), double punch test (DPT) and direct tensile test (DTT). The compressive strength of the concrete used in this study ranged between 30 and 80 MPa with 0%, 1·5% and 3% steel fibre by volume of the concrete. In total, 81 concrete cylinders were cast and tested for 28-d compressive strength, splitting tensile strength and double punch tensile strength of the concrete. In addition, 27 concrete prism specimens were cast and tested …
Improved Performance Of Ballasted Tracks At Transition Zones: A Review Of Experimental And Modelling Approaches, Buddhima Indraratna, Muhammad Babar Sajjad, Ngoc Trung Ngo, A Correia, Richard B. Kelly
Improved Performance Of Ballasted Tracks At Transition Zones: A Review Of Experimental And Modelling Approaches, Buddhima Indraratna, Muhammad Babar Sajjad, Ngoc Trung Ngo, A Correia, Richard B. Kelly
Faculty of Engineering and Information Sciences - Papers: Part B
Track transitionssuch as bridge approaches, road crossings and shifts from slab track to ballasted track are common locations wheretrack degradation accelerates due to dynamic and high impact forces; as a consequence there is higher differential settlement. Thesetypes of discontinuities cause an abrupt change in the structural responseof the track due mainly tovariations in stiffness and track damping. Track transitionzones are prone to an accelerated deterioration of track material and geometrythat leads to increased maintenance costs.Track deteriorationalso leads to vehicle degradation due to enhanced acceleration, low frequency oscillation, and high frequency vibrations. While ballastdeterioration is amajor factor affecting thestability and longevity …
Experimental And Numerical Studies Of Square Concrete-Filled Double Steel Tubular Short Columns Under Eccentric Loading, Mizen Ahmed, Qing Quan Liang, Vipulkumar I. Patel, Muhammad N. S Hadi
Experimental And Numerical Studies Of Square Concrete-Filled Double Steel Tubular Short Columns Under Eccentric Loading, Mizen Ahmed, Qing Quan Liang, Vipulkumar I. Patel, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part B
Square concrete-filled double steel tubular (CFDST) beam-columns consisting of an internal circular steel tube have increasingly been utilized in composite building structures because of their high structural performance. This paper describes experimental and numerical studies on the structural responses of square thin-walled CFDST columns loaded eccentrically. Tests on twenty short square CFDST columns were undertaken that included sixteen columns under eccentric loading and four columns under concentric loading. The parameters examined in the experiments included the cross-sectional dimensions, the width-to-thickness ratios of outer and internal tubes and loading eccentricity. The measured ultimate strengths, load-shortening responses, load-lateral displacement curves, stress-strain curves …
Experimental Performance Analysis And Evaluation Of A Novel Frost-Free Air Source Heat Pump System, Zhihua Wang, Fenghao Wang, Zhenjun Ma, Mengjie Song, Wenke Fan
Experimental Performance Analysis And Evaluation Of A Novel Frost-Free Air Source Heat Pump System, Zhihua Wang, Fenghao Wang, Zhenjun Ma, Mengjie Song, Wenke Fan
Faculty of Engineering and Information Sciences - Papers: Part B
To tackle the problem of frosting occurred on the outdoor coil surface when an air source heat pump (ASHP) is operated in winter, a novel frost-free ASHP system has been developed. However, the dehumidification performance and the frost-free time of the system operated are highly dependent on the electronic expansion valve (EEV) opening of the 1st stage throttle. In addition, the coefficient of performance (COP) of the systems is controlled by the EEV opening of the 2nd stage throttle. Therefore, the objective of this study is to investigate the effect of the EEV opening on the system thermodynamic performance in …
Compressive Behaviour Of Partially Frp Confined Concrete: Experimental Observations And Assessment Of The Stress-Strain Models, Weiqiang Wang, M Neaz Sheikh, Ali Qasim Al-Baali, Muhammad N. S Hadi
Compressive Behaviour Of Partially Frp Confined Concrete: Experimental Observations And Assessment Of The Stress-Strain Models, Weiqiang Wang, M Neaz Sheikh, Ali Qasim Al-Baali, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part B
This study provides new insight on the compressive behaviour of partially fibre reinforced polymer (FRP) confined concrete with either strain-hardening or strain-softening responses. Fully FRP confined concrete, partially FRP confined concrete with different strip gaps, and unconfined concrete were tested under axial compression. Four types of axial load-axial deformation behaviours were observed for specimens with different strip gaps. Even though a high volumetric ratio of FRP was applied, the confinement effectiveness was negligible when the strip gap exceeded the diameter of the specimens. Moreover, the axial stress-axial strain behaviours of wrapped and non-wrapped concrete were observed to be different, and …
Stabilization Of Track Substructure With Geoinclusions- Experimental Evidence And Dem Simulation, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn
Stabilization Of Track Substructure With Geoinclusions- Experimental Evidence And Dem Simulation, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn
Faculty of Engineering and Information Sciences - Papers: Part A
This article reviews on current knowledge of rail track geomechanics, including several important concepts and topics related to laboratory testing and computational modelling, to study the shear stress-strain and deformation of ballast improved by geosynthetics and recycled rubber mats. The effect that impact loads have on ballast degradation and its mitigation due to resilient synthetic mats (i.e. rubber mats) between the ballast and the subballast is investigated using large-scale impact-testing apparatus. Computational modelling with finite element and discrete element methods are increasingly being used to model ballasted tracks reinforced with geosynthetics to capture the continuum media of formation soils and …
Experimental Investigation Of Composite Beams Reinforced With Gfrp I-Beam And Steel Bars, Muhammad N. S Hadi, Jiansong Yuan
Experimental Investigation Of Composite Beams Reinforced With Gfrp I-Beam And Steel Bars, Muhammad N. S Hadi, Jiansong Yuan
Faculty of Engineering and Information Sciences - Papers: Part B
This paper presents results of an experimental study on the flexural behaviour of a composite beam, which is reinforced with longitudinal tensile steel bars as well as glass fibre reinforced polymer (GFRP) pultruded I-beam encased in concrete. Five beam specimens, including one traditional reinforced concrete (RC) beam and four composite beams, were cast and tested under four-point bending. The variables involved in the composite beams include the type of longitudinal tensile bars (steel bars and GFRP bars) and the location of the I-beam in the cross-section (middle and a shift of 30 mm towards the tension region). The test results …
An Experimental Study Of Axial Load Transfer Mechanisms Of Cable Bolts Using Axially Split Embedment Apparatus, Ali Mirza, Naj Aziz
An Experimental Study Of Axial Load Transfer Mechanisms Of Cable Bolts Using Axially Split Embedment Apparatus, Ali Mirza, Naj Aziz
Faculty of Engineering and Information Sciences - Papers: Part B
The load transfer mechanisms of cable bolts differ from those for normal rebar bolts. The cable bolts used in mines are basically steel strands with different constructions depending on the number of wires or elements and the way they are laid. Tendon bolts (rebar and cable) are normally evaluated for their strength and load transfer properties. The tendon strength can be evaluated by the tensile failure tests, while the load transfer strength is evaluated by the pull and shear strength tests. Short Encapsulation Pull Testing (SEPT) is normally used to study the load transfer capacities of tendons, and it can …
Performance Improvement Of Rail Track Substructure Using Artificial Inclusions - Experimental And Numerical Studies, Buddhima Indraratna, Sanjay Nimbalkar, Ngoc Trung Ngo, Tim Neville
Performance Improvement Of Rail Track Substructure Using Artificial Inclusions - Experimental And Numerical Studies, Buddhima Indraratna, Sanjay Nimbalkar, Ngoc Trung Ngo, Tim Neville
Faculty of Engineering and Information Sciences - Papers: Part A
Large and frequent loads from heavy freight and passenger trains often lead to the progressive track deterioration. The excessive deformation and degradation of ballast and unacceptable differential settlement of track and/or pumping of underlying soft subgrade soils necessitates frequent and costly track maintenance. However, artificial inclusions such as geogrids and shockmats can mitigate ballast degradation and improve track performance. A quantitative assessment of the influence of breakage, fouling, and the effects of artificial inclusions on the shear behaviour of ballast can be performed either experimentally or numerically. Numerical modelling can simulate these aspects subject to various types of loading and …
Orthogonal Experimental Design Of Titanium Dioxide - Poly(Methyl Methacrylate) Electrospun Nanocomposite Membranes For Photocatalytic Applications, Andrew Vild, Sara Teixeira, Klaus Kuhn, Gianaurelio Cuniberti, Vitor Sencadas
Orthogonal Experimental Design Of Titanium Dioxide - Poly(Methyl Methacrylate) Electrospun Nanocomposite Membranes For Photocatalytic Applications, Andrew Vild, Sara Teixeira, Klaus Kuhn, Gianaurelio Cuniberti, Vitor Sencadas
Faculty of Engineering and Information Sciences - Papers: Part A
An orthogonal experimental method was designed to assess the influence of the electrospinning processing parameters on average diameter and distribution of poly(methyl methacrylate) (PMMA) fibers. Based on the orthogonal experimental design analysis, electrospun TiO2-PMMA nanocomposites were processed with the optimal polymer processing conditions to obtain thin fibers with a high overall surface area. Further it was found that the average fiber diameter decreases from 2.0 ± 0.5 down to 1.2 ± 0.2 μm with increasing photocatalyst content. Moreover, the wettability of samples was independent of the filler amount, and showed strong hydrophobic behavior. Thermogravimetric analysis showed that for polymer solutions …
Experimental Study On Frp Tube Reinforced Concrete Columns Under Different Loading Conditions, Weiqiang Wang, M Neaz Sheikh, Muhammad N. S Hadi
Experimental Study On Frp Tube Reinforced Concrete Columns Under Different Loading Conditions, Weiqiang Wang, M Neaz Sheikh, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part A
The behavior of fiber-reinforced polymer (FRP) tube reinforced concrete (FTRC) columns under different loading conditions was investigated in this study. Four groups of 16 specimens were cast and tested. Specimens in the first group (the reference group) were re- inforced with longitudinal steel bars and steel helices (Group REF). Specimens in the second group were reinforced with intact glass FRP tubes (Group IT). Specimens in the third group were also reinforced with intact glass FRP tubes. In addition, polymer grid was embedded into the concrete cover to reduce the cover spalling (Group ITG). Specimens in the fourth group were reinforced …
Experimental And Numerical Study On The Effect Of Zddp Films On Sticking During Hot Rolling Of Ferritic Stainless Steel Strip, Liang Hao, Zhengyi Jiang, Dongbin Wei, Dianyao Gong, Xiawei Cheng, Jingwei Zhao, Suzhen Luo, Laizhu Jiang
Experimental And Numerical Study On The Effect Of Zddp Films On Sticking During Hot Rolling Of Ferritic Stainless Steel Strip, Liang Hao, Zhengyi Jiang, Dongbin Wei, Dianyao Gong, Xiawei Cheng, Jingwei Zhao, Suzhen Luo, Laizhu Jiang
Faculty of Engineering and Information Sciences - Papers: Part A
The aim of this study is to investigate the effect of zinc dialkyl dithio phosphate (ZDDP) films on sticking during hot rolling of a ferritic stainless steel strip. The surface characterization and crack propagation of the oxide scale are very important for understanding the mechanism of the sticking. The high-temperature oxidation of one typical ferritic stainless was conducted at 1373 K (1100 °C) for understanding its microstructure and surface morphology. Hot-rolling tests of a ferritic stainless steel strip show that no obvious cracks among the oxide scale were observed with the application of ZDDP. A finite element method model was …
Learning Network Storage Curriculum With Experimental Case Based On Embedded Systems, Qingguo Zhou, Jiong Wu, Ting Wu, Jun Shen, Rui Zhou
Learning Network Storage Curriculum With Experimental Case Based On Embedded Systems, Qingguo Zhou, Jiong Wu, Ting Wu, Jun Shen, Rui Zhou
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we present an experimental case for the course of "Network Storage and Security," which benefited from an improved learning outcome for our students. The newly designed experiments-based contents are merged into the current course to help students obtain practical experiences about network storage. The experiments aim to build a network storage system based on available resources instead of any specialized network storage equipment. Technically, students can learn general practical knowledge of network storage on iSCSI (a network storage protocol based on IP technology) and also the technologies of embedded system. Through the experimental case, we found that …
An Experimental And Numerical Investigation On Micro Rolling For Ultra-Thin Strip, Haibo Xie, Kenichi Manabe, Tsuyoshi Furushima, Kazuo Tada, Zhengyi Jiang
An Experimental And Numerical Investigation On Micro Rolling For Ultra-Thin Strip, Haibo Xie, Kenichi Manabe, Tsuyoshi Furushima, Kazuo Tada, Zhengyi Jiang
Faculty of Engineering and Information Sciences - Papers: Part A
The demand for miniaturized parts and miniaturized semi-finished products is increasing nowadays, because microforming processes can improve production rate and minimize material waste due to less forming passes. However, traditional macro metal forming processes and modelling cannot be simply scaled down to produce miniaturized micro parts. In this study, a 2-Hi micro rolling mill has been successfully built. Experimental and numerical investigations on the micro rolling process for ultra-thin SUS 304 stainless steel strip have been conducted. The experimental results show that the micro rolling deformation of ultra-thin strip is influenced by size effect which results from the specimen size …
Experimental Investigation Of The Behaviour Of Concrete Beams Reinforced With Gfrp Bars Under Static And Impact Loading, Matthew Goldston, Alex M. Remennikov, M Neaz Sheikh
Experimental Investigation Of The Behaviour Of Concrete Beams Reinforced With Gfrp Bars Under Static And Impact Loading, Matthew Goldston, Alex M. Remennikov, M Neaz Sheikh
Faculty of Engineering and Information Sciences - Papers: Part A
Composite materials, including Fibre Reinforced Polymer (FRP) bars, have been gaining momentum as alternatives to traditional steel reinforcements in civil and structural engineering sectors. FRP materials are non-corrosive, non-conductive, and lightweight and possess high longitudinal tensile strength, which are advantageous for their use in civil infrastructure. This paper presents the results of an experimental investigation into the effects of the use of glass FRP (GFRP) bars as internal reinforcement on the behaviour of concrete beams. Both static and dynamic (impact) behaviours of the beam have been investigated. Twelve GFRP reinforced concrete (RC) beams were designed, cast and tested. Six GFRP …
Experimental Investigation Of Gfrp-Reinforced And Gfrp-Encased Square Concrete Specimens Under Axial And Eccentric Load, And Four-Point Bending Test, Muhammad N. S Hadi, Jim Youssef
Experimental Investigation Of Gfrp-Reinforced And Gfrp-Encased Square Concrete Specimens Under Axial And Eccentric Load, And Four-Point Bending Test, Muhammad N. S Hadi, Jim Youssef
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents the results of an experimental study on the axial and flexural behavior of square concrete members reinforced with glass fiber-reinforced polymer (GFRP) bars and embedded with pultruded GFRP structural sections under different loading conditions. The main parameters investigated in this study were the influence of the type of internal reinforcement (steel bars, GFRP bars and pultruded GFRP structural I-sections and C-sections) and magnitude of load eccentricity on the flexural and compressive behavior of square concrete members. To fulfil the objectives of this study, 16 reinforced concrete specimens were tested, of which 12 were tested as columns under …
Experimental Investigation Of Welding Stresses In Mwic Weldability Test, Houman Alipooramirabad, Anna Paradowska, Reza Ghomashchi, Nicholas P. Hoye, Mark H. Reid
Experimental Investigation Of Welding Stresses In Mwic Weldability Test, Houman Alipooramirabad, Anna Paradowska, Reza Ghomashchi, Nicholas P. Hoye, Mark H. Reid
Faculty of Engineering and Information Sciences - Papers: Part A
The use of high-strength steels in the manufacture of energy pipelines, coupled with the transition to larger pipe diameters and greater wall thicknesses, has led to an increased potential for cracking including hydrogen assisted cracking of energy pipelines due to higher constraint induced stresses. In the present study, a modified version of the Welding Institute of Canada (MWIC) restraint test was used to simulate the constraint conditions of full-scale girth welds on energy pipelines, allowing the influence of welding process parameters on crack formation to be assessed. MWIC test samples of X70 grade high-strength low alloy pipeline steel were manually …
Rock Bolt Corrosion - An Experimental Study, Naj Aziz, P Craig, Jan Nemcik, Faisal Hai
Rock Bolt Corrosion - An Experimental Study, Naj Aziz, P Craig, Jan Nemcik, Faisal Hai
Faisal I Hai
The effect of long term exposure of full size bolts to corrosive environments is presented. A special test rig was used to test four bolts under different loading conditions. Four X-grade identical profile bolts, each 21·7 mm core diameter (23·7 mm full diameter) were subjected to prolonged corrosion testing using acid sulphate water. The pH value of the circulated water varied between 3·4 and 4·3. The corrosion exposure test period lasted 3·5 years. Two bolts were axially loaded to 10 t and 20 t force respectively, the third bolt was subjected to a 360 Nm torsion load and the fourth …
Experimental Investigation Of An Innovative Hvac System With Integrated Pvt And Pcm Thermal Storage For A Net-Zero Energy Retrofitted House, Massimo Fiorentini, Paul Cooper, Zhenjun Ma, Josh Wall
Experimental Investigation Of An Innovative Hvac System With Integrated Pvt And Pcm Thermal Storage For A Net-Zero Energy Retrofitted House, Massimo Fiorentini, Paul Cooper, Zhenjun Ma, Josh Wall
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents the experimental investigation of a novel solar assisted HVAC system developed for the Team UOW Solar Decathlon house, the overall winner of the Solar Decathlon China 2013 competition. This novel HVAC system consists of an air based photovoltaic-thermal (PVT) system and a phase change material (PCM) thermal storage unit integrated with a ducted system with a reverse-cycle heat pump. The system has been designed for operation during both winter and summer, using daytime solar radiation and night sky radiative cooling to increase the energy efficiency of the air-conditioning system. The PVT system can exchange heat with the …
A Combined Experimental-Numerical Approach For Determining Mechanical Properties Of Aluminum Subjects To Nanoindentation, Mao Liu, Cheng Lu, A Kiet Tieu, Ching-Tun Peng, Charlie Kong
A Combined Experimental-Numerical Approach For Determining Mechanical Properties Of Aluminum Subjects To Nanoindentation, Mao Liu, Cheng Lu, A Kiet Tieu, Ching-Tun Peng, Charlie Kong
Faculty of Engineering and Information Sciences - Papers: Part A
A crystal plasticity finite element method (CPFEM) model has been developed to investigate the mechanical properties and micro-texture evolution of single-crystal aluminum induced by a sharp Berkovich indenter. The load-displacement curves, pile-up patterns and lattice rotation angles from simulation are consistent with the experimental results. The pile-up phenomenon and lattice rotation have been discussed based on the theory of crystal plasticity. In addition, a polycrystal tensile CPFEM model has been established to explore the relationship between indentation hardness and yield stress. The elastic constraint factor C is slightly larger than conventional value 3 due to the strain hardening.
Experimental And Numerical Study Of Micro Deep Drawing, Liang Luo, Zhengyi Jiang, Dongbin Wei, Kenichi Manabe, Hideki Sato
Experimental And Numerical Study Of Micro Deep Drawing, Liang Luo, Zhengyi Jiang, Dongbin Wei, Kenichi Manabe, Hideki Sato
Faculty of Engineering and Information Sciences - Papers: Part A
Micro forming is a key technology for an industrial miniaturisation trend, and micro deep drawing (MDD) is a typical micro forming method. It has great advantages comparing to other micro manufacturing methods, such as net forming ability, mass production potential, high product quality and complex 3D metal products fabrication capacity. Meanwhile, it is facing difficulties, for example the so-called size effects, once scaled down to micro scale. To investigate and to solve the problems in MDD, a combined micro blanking-drawing machine is employed and an explicit-implicit micro deep drawing model with a voronoi blank model is developed. Through heat treatment …
Novel Experimental Setup For Time-Of-Flight Mass Spectrometry Ion Detection In Collisions Of Anionic Species With Neutral Gas-Phase Molecular Targets, J C. Oller, L Ellis-Gibbings, F Ferreira Da Silva, Paulo Limao-Vieira, Gustavo Garcia
Novel Experimental Setup For Time-Of-Flight Mass Spectrometry Ion Detection In Collisions Of Anionic Species With Neutral Gas-Phase Molecular Targets, J C. Oller, L Ellis-Gibbings, F Ferreira Da Silva, Paulo Limao-Vieira, Gustavo Garcia
Faculty of Engineering and Information Sciences - Papers: Part A
We report a novel experimental setup for studying collision induced products resulting from the interaction of anionic beams with a neutral gas-phase molecular target. The precursor projectile was admitted into vacuum through a commercial pulsed valve, with the anionic beam produced in a hollow cathode discharge-induced plasma, and guided to the interaction region by a set of deflecting plates where it was made to interact with the target beam. Depending on the collision energy regime, negative and positive species can be formed in the collision region and ions were time-of-flight (TOF) mass-analysed. Here, we present data on O-2 precursor projectile, …
An Experimental And Numerical Study Of Micro Deep Drawing Of Sus304 Circular Cups, Liang Luo, Zhengyi Jiang, Dongbin Wei, Kenichi Manabe, Hideki Sato, Xiaofeng He, Pengfei Li
An Experimental And Numerical Study Of Micro Deep Drawing Of Sus304 Circular Cups, Liang Luo, Zhengyi Jiang, Dongbin Wei, Kenichi Manabe, Hideki Sato, Xiaofeng He, Pengfei Li
Faculty of Engineering and Information Sciences - Papers: Part B
Micro deep drawing is a promising technology for mass production of complex 3D micro metal products. Significant size effects at a micro scale, however, obstruct application of this technology and block utilisation of traditional finite element method (FEM). Therefore, a micro tensile test system was developed to obtain accurate material properties considering size effects. Subsequently, a Voronoi blank model was developed for the micro scale simulation. Moreover, micro deep drawing experiments were conducted and their results were compared with the simulation results. The simulation results have a good agreement with the experimental data. Furthermore, the wrinkling at the cup mouth …
Synchrotron Radiation Based Experimental Determination Of The Optimal Energy For Cell Radiotoxicity Enhancement Following Photoelectric Effect On Stable Iodinated Compounds, S Corde, A Joubert, J F. Adam, A M. Charvet, J F. Le Bas, F Esteve, H Elleaume, J Balosso
Synchrotron Radiation Based Experimental Determination Of The Optimal Energy For Cell Radiotoxicity Enhancement Following Photoelectric Effect On Stable Iodinated Compounds, S Corde, A Joubert, J F. Adam, A M. Charvet, J F. Le Bas, F Esteve, H Elleaume, J Balosso
Stéphanie Corde
This study was designed to experimentally evaluate the optimal X-ray energy for increasing the radiation energy absorbed in tumours loaded with iodinated compounds, using the photoelectric effect. SQ20B human cells were irradiated with synchrotron monochromatic beam tuned at 32.8, 33.5, 50 and 70 keV. Two cell treatments were compared to the control: cells suspended in 10 mg ml1 of iodine radiological contrast agent or cells pre-exposed with 10 mM of iodo-desoxyuridine (IUdR) for 48 h. Our radiobiological end point was clonogenic cell survival. Cells irradiated with both iodine compounds exhibited a radiation sensitisation enhancement. Moreover, it was energy dependent, with …
An Advanced Mathematical Model And Its Experimental Verification For Trilayer Conjugated Polymer Actuators, Chuc Nguyen, Gursel Alici, Gordon G. Wallace
An Advanced Mathematical Model And Its Experimental Verification For Trilayer Conjugated Polymer Actuators, Chuc Nguyen, Gursel Alici, Gordon G. Wallace
Faculty of Engineering and Information Sciences - Papers: Part A
This paper describes the establishment of an enhanced mathematical model and an inversion-based controller based on the proposed model for a trilayer conjugated polymer actuator that will steer a cochlear implant through a 3-D structure. The multilayer electroactive polymer actuator that operates in air will suit many biomedical applications. We propose to use viscoelastic models for the conducting polymer and membrane layers of the actuator so that its mechanical properties can be incorporated into the actuator more accurately. The proposed model accurately predicts the frequency response of the electrical admittance and curvature of the conjugated polymer actuators, and its efficacy …
An Experimental Investigation On The Deformation And Degradation Behaviour Of Geogrid-Reinforced Ballast, Sd. K Karimullah Hussaini, B Indraratna, J S. Vinod
An Experimental Investigation On The Deformation And Degradation Behaviour Of Geogrid-Reinforced Ballast, Sd. K Karimullah Hussaini, B Indraratna, J S. Vinod
Faculty of Engineering and Information Sciences - Papers: Part A
Railroad ballast, owing to its unbounded granular nature, spreads laterally when subjected to large vertical axle loads, which influences the track stability. In this view, large-scale cyclic tests have been conducted on ballast to explore the role of geogrid in controlling the lateral deformation of ballast and hence improving the track performance. Fresh latite ballast having a mean particle size of 35 mm and geogrids with different aperture sizes was used for the investigations. Tests were conducted using a modified process simulation test (MPST) apparatus at a loading frequency of 20 Hz, with geogrid placed at the subballast-ballast interface and …
A Combined Experimental And Simulation Method For Appraising The Energy Performance Of Green Roofs In Ningbo's Chinese Climate, Georgios Kokogiannakis, Jo Darkwa, Kate Yuan
A Combined Experimental And Simulation Method For Appraising The Energy Performance Of Green Roofs In Ningbo's Chinese Climate, Georgios Kokogiannakis, Jo Darkwa, Kate Yuan
Faculty of Engineering and Information Sciences - Papers: Part A
A passive means of lowering the energy demand of buildings is the application of green roofs. The complexity between heat and moisture exchanges in green roof layers and the large variations of green roof types make the need for experimental or simulation assessments necessary for quantifying the energy benefits from green roofs. The current treatment of green roofs in simulation programs is either over-simplistic, for example by ignoring heat and moisture exchanges such as evapotranspiration, or the more advanced models have limitations and require inputs that are rarely available in practice. In this paper a combination of experimental and modelling …
Total Electron Scattering Cross Sections For Pyrimidine And Pyrazine As Measured Using A Magnetically Confined Experimental System, M Fuss, A Sanz, Francisco Blanco, J C. Oller, Paulo Limao-Vieira, M J. Brunger, Gustavo García
Total Electron Scattering Cross Sections For Pyrimidine And Pyrazine As Measured Using A Magnetically Confined Experimental System, M Fuss, A Sanz, Francisco Blanco, J C. Oller, Paulo Limao-Vieira, M J. Brunger, Gustavo García
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, a recently constructed apparatus for measuring electron scattering cross sections while applying a strong axial magnetic field is utilized for determining total scattering cross sections. The first molecules studied with this setup are pyrimidine (1,3-diazine) and pyrazine (1,4-diazine), whose total cross sections are obtained for the incident electron energy range of 8-500 eV. Quite good agreement with earlier theoretical predictions is found after accounting for the angular acceptance (angular resolution for forward scattering) of the apparatus. However, no other experimental total cross sections for electron scattering from pyrimidine or pyrazine have been found in the literature for …