Stress Prediction Model For Frp Confined Rectangular Concrete Columns With Rounded Corners,
2014
University of Wollongong
Stress Prediction Model For Frp Confined Rectangular Concrete Columns With Rounded Corners, Thong M. Pham, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part A
The paper uses the membrane hypothesis to formulate the confining behavior of fiber-reinforced polymer (FRP) confined rectangular columns. A model was developed to calculate the strength of FRP confined rectangular concrete columns. The model was verified using a database of 190 FRP confined rectangular concrete columns. The database covers unconfined concrete strength between 18.3 and 55.2 MPa, and specimens with dimensions ranging from 79-305 mm and 100-305 mm for short and long sides, respectively. The performance of the proposed model shows a very good correlation with the experimental results. In addition, the strain distribution of FRP around the circumference of …
Large-Area Binary Blazed Grating Coupler Between Nanophotonic Waveguide And Led,
2014
Tianjin University of Technology
Large-Area Binary Blazed Grating Coupler Between Nanophotonic Waveguide And Led, Hongqiang Li, Wenqian Zhou, Meiling Zhang, Yu Liu, Cheng Zhang, Enbang Li, Changyun Miao, Chunxiao Tang
Faculty of Engineering and Information Sciences - Papers: Part A
A large-area binary blazed grating coupler for the arrayed waveguide grating (AWG) demodulation integrated microsystem on silicon-on-insulator (SOI) was designed for the first time. Through the coupler, light can be coupled into the SOI waveguide from the InP-based C-band LED for the AWG demodulation integrated microsystem to function. Both the length and width of the grating coupler are 360 mu m, as large as the InP-based C-band LED light emitting area in the system. The coupler was designed and optimized based on the finite difference time domain method. When the incident angle of the light source is 0 degrees, the …
Efeito Da Granulometria Na Deformação E Quebra De Lastro Ferroviário,
2014
Pontifícia Universidade Catolica do Rio de Janeiro
Efeito Da Granulometria Na Deformação E Quebra De Lastro Ferroviário, Gino O. Calderon Vizcarra, Sanjay Nimbalkar, Buddhima Indraratna, Michele Dal Toe Casagrande
Faculty of Engineering and Information Sciences - Papers: Part A
O efeito da granulometria no comportamento mecânico do lastro tem sido estudado por vários pesquisadores no passado. A revisão de estes estudos indicaram que uma gradação mais uniforme que as atualmente usadas pela indústria ferroviária, diminuiria a deformação permanente e degradação do lastro ferroviário. Neste estudo, o equipamento prismoidal triaxial cíclico projetado e construído na Universidade de Wollongong foi utilizado. Duas granulometrias de lastro foram testadas sob tensão vertical cíclica máxima de 450 kPa. Os resultados mostraram que a granulometria teve grande influencia a deformação permanente e quebra de lastro ferroviário.
Erosion Mitigation Of Lignosulfonate Treated Unstable Soils,
2014
University of Wollongong
Erosion Mitigation Of Lignosulfonate Treated Unstable Soils, Buddhima Indraratna, Rasika Manori Athukorala, J S Vinod
Faculty of Engineering and Information Sciences - Papers: Part A
Highly unstable soils are common in many parts of the world. In recent years, traditional chemical admixtures such as cement, lime and fly ash were used for stabilising these soils. However, not all chemical stabilisers are readily acceptable due to stringent occupational health and safety issues and invariable change of soil pH that often limits the scope of vegetation plus imposing a threat to ground water pollution. However, recent research shows that lignosulfonate, an environmentally sustainable admixture, can stabilise unstable and erodible soils without causing adverse effects on the environment. This paper presents the results of a laboratory investigation and …
Evaluation Of The Coal Wash And Steel Furnace Slag Blends As Effective Reclamation Fill For Port Expansion,
2014
University of Wollongong
Evaluation Of The Coal Wash And Steel Furnace Slag Blends As Effective Reclamation Fill For Port Expansion, Ana Heitor, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Gabriele Chiaro, S.M.Ali Tasalloti
Faculty of Engineering and Information Sciences - Papers: Part A
Coal wash (CW) and steel furnace slag (SFS) are granular waste by-products that result from the operation of the coal mining and the steel industries, respectively. Their effective reuse and recycling as fill materials for earthwork construction, embankments and/or structural fill materials in port expansion projects, is economically attractive and environmentally sustainable because it lessens the need for disposal and sourcing of materials from local quarries. As the need for blending these materials arises from their individual adverse geotechnical characteristics, i.e. swelling and breakage behaviour in SFS and CW, it is important to evaluate the suitability of different mixtures ratios …
Requirements Elicitation And Specification Using The Agent Paradigm: The Case Study Of An Aircraft Turnaround Simulator,
2014
University of Melbourne
Requirements Elicitation And Specification Using The Agent Paradigm: The Case Study Of An Aircraft Turnaround Simulator, Tim Miller, Bin Lu, Leon Sterling, Ghassan Beydoun, Kuldar Taveter
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we describe research results arising from a technology transfer exercise on agent-oriented requirements engineering with an industry partner. We introduce two improvements to the state-of-the-art in agent-oriented requirements engineering, designed to mitigate two problems experienced by ourselves and our industry partner: (1) the lack of systematic methods for agent-oriented requirements elicitation and modelling; and (2) the lack of prescribed deliverables in agent-oriented requirements engineering. We discuss the application of our new approach to an aircraft turnaround simulator built in conjunction with our industry partner, and show how agent-oriented models can be derived and used to construct a …
A Novel Hydro-Geochemical Model For Treating Acidic Groundwater Utilizing A Permeable Reactive Barrier,
2014
University of Wollongong
A Novel Hydro-Geochemical Model For Treating Acidic Groundwater Utilizing A Permeable Reactive Barrier, Punyama Udeshini Pathirage, Buddhima Indraratna, Laura Banasiak
Faculty of Engineering and Information Sciences - Papers: Part A
Acidic groundwater generation from acid sulfate soil is a severe environmental and socio-economic problem in coastal Australia. A novel permeable reactive barrier (PRB) utilising recycled concrete aggregates as the reactive media was installed in the Shoalhaven Floodplain, south of Wollongong in Australia. The performance of the PRB has been monitored to study the acid neutralisation behaviour of recycled concrete and its potential to remove high concentrations of Al and Fe, which are threatening to living habitat. This study aims to couple geochemistry with geo-hydraulics in the remediation of acidic groundwater generated in acid sulfate soil terrain, which has not been …
Improvement Of Soil Stability Along Rail Corridors Through Native Vegetation,
2014
University of Wollongong
Improvement Of Soil Stability Along Rail Corridors Through Native Vegetation, Buddhima Indraratna, Muditha Pallewattha, Behzad Fatahi, Punyama Udeshini Pathirage
Faculty of Engineering and Information Sciences - Papers: Part A
Field studies conducted along the railway lines in Australia have revealed the ability to implement the green corridor concept as a soil stabilization method. Native trees grown along rail corridors are capable of increasing the matric suction of the subgrade soil underneath the track substructure via root water uptake, in conjunction with the tree canopy evapo-transpiration. Moreover, these trees are capable of providing significant mechanical reinforcement through the anchoring effect provided by the root network plus the additional cohesive increment due to hair roots generating osmotic suction. Much of the previous research carried out to quantify the mechanical strength generated …
Exploiting Superior Tensile Properties Of A Novel Network-Structure Ala206 Matrix Composite By Hybridizing Micron-Sized Al3ti With Al2o3 Nano Particulates,
2014
University of Tehran
Exploiting Superior Tensile Properties Of A Novel Network-Structure Ala206 Matrix Composite By Hybridizing Micron-Sized Al3ti With Al2o3 Nano Particulates, S Tahamtan, A Halvaee, M Emamy, Z Y. Jiang, A Fadavi Boostani
Faculty of Engineering and Information Sciences - Papers: Part A
In this study, semi-solid stir casting and ball milling processes are combined into an integrated composite fabrication process. Two different architectures were utilized to incorporate reinforcing particle into semi-solid alloy i.e., (i) ball milling of K2TiF6 and aluminum powder for 5h and subsequently with nano-alumina particles (Al2O3np) for 1h and (ii) ball milling of K2TiF6, Al2O3np and aluminum powder for 2h. Accordingly, the milled powders were incorporated into molten AlA206 alloy using a non-contact ultrasonic vibration method. The effect of milling procedure on microstructural evolution and tensile properties were then explored. Two different microstructures were characterized including well-distributed Al2O3np and …
Green Building Scheme Review Adds Yet More Policy Uncertainty,
2014
University of Wollongong
Green Building Scheme Review Adds Yet More Policy Uncertainty, Daniel Daly, Paul Cooper
Faculty of Engineering and Information Sciences - Papers: Part A
Australia's policies to cut greenhouse emissions have been shrouded in uncertainty over the past few months. The contentious Renewable Energy Target review and the swapping of the carbon price for Direct Action have garnered most of the headlines. But another policy, which has quietly been cutting emissions for the past four years, is now also under scrutiny.
Particle Sizing Using Dielectrophoresis-Active Hydrophoresis,
2014
University of Wollongong
Particle Sizing Using Dielectrophoresis-Active Hydrophoresis, Sheng Yan, Jun Zhang, Yuan Yuan, Gursel Alici, Haiping Du, Y Zhu, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part A
A particle sizing technique using dielectrophoresis-active hydrophoresis is presented in this study. This method can measure particle diameters without complex optical tools and electric impedance, and can be adjusted by modulating the external voltage.
A State-Of-The-Art Review On Magnetorheological Elastomer Devices,
2014
University of Technology Sydney
A State-Of-The-Art Review On Magnetorheological Elastomer Devices, Yancheng Li, Jianchun Li, Weihua Li, Haiping Du
Faculty of Engineering and Information Sciences - Papers: Part A
During the last few decades, magnetorheological (MR) elastomers have attracted a significant amount of attention for their enormous potential in engineering applications. Because they are a solid counterpart to MR fluids, MR elastomers exhibit a unique field-dependent material property when exposed to a magnetic field, and they overcome major issues faced in magnetorheological fluids, e.g. the deposition of iron particles, sealing problems and environmental contamination. Such advantages offer great potential for designing intelligent devices to be used in various engineering fields, especially in fields that involve vibration reduction and isolation. This paper presents a state of the art review on …
Analysing The Quality Of Experience Of Multisensory Media From Measurements Of Physiological Responses,
2014
University of Wollongong
Analysing The Quality Of Experience Of Multisensory Media From Measurements Of Physiological Responses, Jacob Donley, Christian H. Ritz, Muawiyath Shujau
Faculty of Engineering and Information Sciences - Papers: Part A
This paper investigates the Quality of Experience (QoE) of multisensory media by analysing biosignals collected by electroencephalography (EEG) and eye gaze sensors and comparing with subjective ratings. Also investigated is the impact on QoE of various levels of synchronicity between the sensory effect and target video scene. Results confirm findings from previous research that show sensory effects added to videos increases the QoE rating. While there was no statistical difference observed for the QoE ratings for different levels of sensory effect synchronicity, an analysis of raw EEG data showed 25% more activity in the temporal lobe during asynchronous effects and …
Let Me Be Learned: Decision Support Aiding Public Participation,
2014
University of Wollongong
Let Me Be Learned: Decision Support Aiding Public Participation, Raymond Laine, Christopher David Cook
Faculty of Engineering and Information Sciences - Papers: Part A
With best practice flood risk management processes rightly emphasising the need for a collaborative, transparent and inclusive approach to improve community resilience, this paper explores a new Engagement Decision Support System (EDSS) as a mechanism to assist in this process. This paper presents the need, theory and development of a flood risk management EDSS and presents trial results, where the tool has been successfully utilised for three catchments in New South Wales, Australia. The results from these trials indicate that a well-structured, engagement focused decision support system can provide a mechanism for and empower the public to learn about, prioritise …
Removing The Impulsive Noise Contained In A Self-Mixing Interferometry System Using Outlier Detection,
2014
University of Wollongong
Removing The Impulsive Noise Contained In A Self-Mixing Interferometry System Using Outlier Detection, Yan Gao, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong, Sheng Tong
Faculty of Engineering and Information Sciences - Papers: Part A
Impulsive noise is a major problem that seriously degrades the performance of self-mixing interferometry (SMI). A new method to rectify this issue is proposed. First, an outlier detection approach is employed to detect the data samples corrupted by the impulsive noise, and then the SMI signal waveform is rectified by means of least square (LS) curve fitting. The results show that the proposed method can effectively remove the impulsive noise without introducing distortion to the original waveform and thus lead to improvement in the performance of an SMI system.
Reynolds Number Influence On The Vortex-Induced Vibration Critical Point Of A Pivoted Cylinder,
2014
University of Wollongong
Reynolds Number Influence On The Vortex-Induced Vibration Critical Point Of A Pivoted Cylinder, Brad Stappenbelt, Andrew D. Johnstone
Faculty of Engineering and Information Sciences - Papers: Part A
The aim of the present investigation was to examine the Reynolds number dependence of the critical vortex-induced vibration (VIV) point for cylinde rs in a pivoted system. For translational systems, the existence of a critical mass ratio for cylinders undergoing vortex-induced vibration has been well established.
Investigation Into The Effect Of Vortex-Induced Vibrations On The Power-Output Of A Pitching Cylinder Wave Energy Converter,
2014
University of Wollongong
Investigation Into The Effect Of Vortex-Induced Vibrations On The Power-Output Of A Pitching Cylinder Wave Energy Converter, Ashley W. Heath, Brad Stappenbelt
Faculty of Engineering and Information Sciences - Papers: Part A
The aim of the present investigation was to examine the question of whether the introduction of cross-flow vortex-induced vibration (VIV) of point absorber wave energy extraction devices is detrimental or beneficial to power take-off (PTO) efficiency. The dynamic drag amplification experienced by a circular cylinder undergoing cross-flow vortex-induced vibration is well documented for both the steady flow and oscillatory flow cases. The dynamic drag amplification experienced by a cylinder undergoing VIV in a wave environment indicates that there are potential benefits in allowing a drag dominated wave energy device to simultaneously experience cross-flow VIV. Experiments were conducted with a pivoted …
Electrochemistry And Structure Of The Cobalt-Free Li1+Xmo2 (M = Li, Ni, Mn, Fe) Composite Cathode,
2014
University of Wollongong
Electrochemistry And Structure Of The Cobalt-Free Li1+Xmo2 (M = Li, Ni, Mn, Fe) Composite Cathode, Wei Kong Pang, Sujith Kalluri, Vanessa Peterson, S X. Dou, Zaiping Guo
Faculty of Engineering and Information Sciences - Papers: Part A
The development of cathode materials with high capacity and cycle stability is essential to emerging electric-vehicle technologies, however, of serious environmental concern is that materials with these properties developed so far contain the toxic and expensive Co. We report here the Li-rich, Co-free Li1+xMO2 (M = Li, Ni, Mn, Fe) composite cathode material, prepared via a template-free, one-step wet-chemical method followed by conventional annealing in an oxygen atmosphere. The cathode has an unprecedented level of cation mixing, where the electrochemically-active component contains four elements at the transition-metal (3a) site and 20% Ni at the active Li site (3b). We find …
Large Wind Turbine Structural Load Control: Trailing Edge Deformation Mechanism For Active Variable-Camber Blade,
2014
University of Wollongong
Large Wind Turbine Structural Load Control: Trailing Edge Deformation Mechanism For Active Variable-Camber Blade, Michael Dicker, Buyung Kosasih
Faculty of Engineering and Information Sciences - Papers: Part A
Blade root fatigue stress, primarily resulting from wind shear and turbulence, is a critical factor in wind turbine design. Blade mounted aerodynamic control devices have been shown to have the potential to reduce this. However, limited research exists into suitable devices. The blade designed in this work addresses this by employing an actuated compliant mechanism, contained within a flexible matrix composite structure. The resulting mechanism design achieves a sectional change in lift coefficient of ΔCL + 0.4 to -0.15. The performance of the blade is analysed with a quasi-steady time marching BEM model. A reduction of 21.59% in the standard …
How The Type Of Input Function Affects The Dynamic Response Of Conducting Polymer Actuators,
2014
University of Wollongong
How The Type Of Input Function Affects The Dynamic Response Of Conducting Polymer Actuators, Xingcan Xiang, Gursel Alici, Rahim Mutlu, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part A
There has been a growing interest in smart actuators typified by conducting polymer actuators, especially in their (i) fabrication, modeling and control with minimum external data and (ii) applications in bio-inspired devices, robotics and mechatronics. Their control is a challenging research problem due to the complex and nonlinear properties of these actuators, which cannot be predicted accurately. Based on an input-shaping technique, we propose a new method to improve the conducting polymer actuators' command-following ability, while minimizing their electric power consumption. We applied four input functions with smooth characteristics to a trilayer conducting polymer actuator to experimentally evaluate its command-following …
