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Full-Text Articles in Engineering
Performance Of Cfrp Wrapped Square Reinforced Concrete Columns Subjected To Eccentric Loading, Ida Bagus Rai Widiarsa, Muhammad N. S Hadi
Performance Of Cfrp Wrapped Square Reinforced Concrete Columns Subjected To Eccentric Loading, Ida Bagus Rai Widiarsa, Muhammad N. S Hadi
Faculty of Engineering - Papers (Archive)
Strengthening concrete columns with fibre-reinforced polymer (FRP) has been tudied extensively, but the majority of published tudies have focllsed on circular column. Most concrete columns in the field have square 01' r ctangul3r cross ections and resist ecc nt.ric loading as well. The objective of this study i to investigate the performance of square reinforced concrete (RC) columns wrapped with carbon FRP subjected to eccentric Loading. The influence of two parameters was studied including the number of FRP layers and the magnitude of eccentricity. Compression testing was conducted on twe Ive short quare RC columns wrapped with CFRP composites. The …
Performance And Prediction Of Surcharge And Vacuum Consolidation Via Prefabricated Vertical Drains With Special Reference To Highways, Railways And Ports, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Xueyu Geng
Performance And Prediction Of Surcharge And Vacuum Consolidation Via Prefabricated Vertical Drains With Special Reference To Highways, Railways And Ports, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Xueyu Geng
Faculty of Engineering - Papers (Archive)
Much of the world’s essential infrastructure is built along congested coastal belts that are composed of highly compressible and weak soils up to significant depths. Soft alluvial and marine clay deposits have very low bearing capacity and excessive settlement characteristics, with obvious design and maintenance implications on tall structures and large commercial buildings, as well as port and transport infrastructure. Stabilising these soft soils before commencing construction is essential for both long term and short term stability. A system of vertical drains combined with vacuum pressure and surcharge preloading has become an attractive ground improvement alternative in terms of both …
Performance Of Geosynthetically-Reinforced Rail Ballast In Direct Shear Conditions, Sd K Karimullah Hussaini, Buddhima Indraratna, J S. Vinod
Performance Of Geosynthetically-Reinforced Rail Ballast In Direct Shear Conditions, Sd K Karimullah Hussaini, Buddhima Indraratna, J S. Vinod
Faculty of Engineering - Papers (Archive)
In the recent past the use of geosynthetic-reinforcement to stabilise the rail tracks has been on the rise. The performance of such reinforced track is governed by the shear behavior of the ballastgeosynthetic interface. In view of this, large-scale direct shear tests were performed to explore the shear behaviour of rail ballast-geogrid interfaces. Fresh Latite ballast with an average particle size (D50) of 35 mm, and geogrids with different aperture sizes and shapes were used for this purpose. The laboratory experimental results indicate that the shear strength of ballast can be improved significantly when reinforced with geosynthetics, but the degree …
Performance And Prediction Of Vacuum Combined Surcharge Consolidation At Port Of Brisbane, Buddhima Indraratna, Jayantha Ameratunga, Cholachat Rujikiatkamjorn, Harry G. Poulos, A S. Balasublamaniam
Performance And Prediction Of Vacuum Combined Surcharge Consolidation At Port Of Brisbane, Buddhima Indraratna, Jayantha Ameratunga, Cholachat Rujikiatkamjorn, Harry G. Poulos, A S. Balasublamaniam
Faculty of Engineering - Papers (Archive)
During the past decade, the application of vacuum pressure for stabilising soft coastal clay and other low-lying estuarine soils has become increasingly popular in Australia, mainly due to the proven costeffectiveness in view of the significantly reduced time for achieving a high degree of consolidation and enhanced shear strength. Due to an increase in trade activities at the Port of Brisbane, new facilities on Fisherman Islands at the mouth of the Brisbane River will be constructed on the new outer area (235ha) adjacent to the existing port facilities via land reclamation. A scheme of vacuum assisted surcharge load in conjunction …
Field Monitoring Of Performance Of Ballasted Rail Track With Geosynthetic Reinforcement, P Anantanasakul, B Indraratna, S S. Nimbalkar, T Neville
Field Monitoring Of Performance Of Ballasted Rail Track With Geosynthetic Reinforcement, P Anantanasakul, B Indraratna, S S. Nimbalkar, T Neville
Faculty of Engineering - Papers (Archive)
Large cyclic stresses induced from heavy traffic can cause significant degradation of rail tracks, leading to poor track geometry and safety. Inclusion of resilient materials such as geosynthetics to reinforce the track substructure has been observed in the laboratory to be viable at reducing the impact of such adverse effects. Despite this, the ‘field’ performance of different geosynthetics to reinforce ballasted tracks has not been investigated in a systematic manner. An extensive field study was therefore undertaken on experimental track sections near Singleton, New South Wales. Four types of geosynthetics were installed at the ballast-subballast interface of track sections constructed …
Track Stabilisation With Geosynthetics And Geodrains, And Performance Verification Through Field Monitoring And Numerical Modelling, Buddhima Indraratna, S Nimbalkar, Cholachat Rujikiatkamjorn
Track Stabilisation With Geosynthetics And Geodrains, And Performance Verification Through Field Monitoring And Numerical Modelling, Buddhima Indraratna, S Nimbalkar, Cholachat Rujikiatkamjorn
Faculty of Engineering - Papers (Archive)
All over the world, ballasted railway tracks form one of the major transportation networks designed to provide heavy haul freight and passenger traffic. However, large cyclic loading from heavy axle trains operating at high speeds often causes excessive deformation and degradation of ballast, as well as unacceptable differential settlement of compressible foundation and, or pumping of the soft subgrade soils. The problem becomes more severe under high impact loads due to rail or wheel imperfections, causing accelerated ballast breakage. A proper understanding of load transfer mechanisms and their effects on track deformations are essential prerequisites for minimising maintenance costs. The …
A Novel Model To Measure Supplier Performance In The Supplier Selection Process, Alptekin Ulutas, Senevi Kiridena, Peter Gibson
A Novel Model To Measure Supplier Performance In The Supplier Selection Process, Alptekin Ulutas, Senevi Kiridena, Peter Gibson
Faculty of Engineering - Papers (Archive)
Supplier evaluation has become a significant topic over the past decades, as companies have started to become more outsourced oriented. However, previous research on this topic has not paid adequate attention to the limitations associated with availability of accurate and reliable data relating to the performance of potential suppliers. In an attempt to address this issue, this paper proposes a novel supplier evaluation model that can handle imprecise quantitative and qualitative data. Additionally, Decision Maker’s opinions regarding both qualitative and quantitative criteria are incorporated into this model so that a more comprehensive and realistic assessment of supplier performance can be …
A "Skeleton/Skin"Strategy For Preparing Ultrathin Free-Standing Single-Walled Carbon Nanotube/Polyaniline Films For High Performance Supercapacitor Electrodes, Zhiqiang Niu, Pingshan Luan, Qi Shao, Haibo Dong, Jinzhu Li, Jun Chen, Duan Zhao, Le Cai, Weiya Zhou, Xiaodong Chen, Sishen Xie
A "Skeleton/Skin"Strategy For Preparing Ultrathin Free-Standing Single-Walled Carbon Nanotube/Polyaniline Films For High Performance Supercapacitor Electrodes, Zhiqiang Niu, Pingshan Luan, Qi Shao, Haibo Dong, Jinzhu Li, Jun Chen, Duan Zhao, Le Cai, Weiya Zhou, Xiaodong Chen, Sishen Xie
Faculty of Engineering - Papers (Archive)
One of the most critical aspects in the preparation of single-walled carbon nanotubes (SWCNTs)/ conducting polymer hybrid electrodes is to improve the energy density without seriously deteriorating their high power capability. Here, we report a ‘‘skeleton/skin’’ strategy for the preparation of freestanding, thin and flexible SWCNT/polyaniline (PANI) hybrid films by a simple in situ electrochemical polymerization method using directly grown SWCNT films with a continuous reticulate structure as template. In situ electrochemical polymerization can achieve effective deposition of PANI onto the surface of SWCNT bundles in the films and control the morphology and microstructure of the SWCNT/PANI hybrid films. In …
Synthesis Of Uniform Tio2@Carbon Composite Nanofibers As Anode For Lithium Ion Batteries With Enhanced Electrochemical Performance, Zunxian Yang, Guodong Du, Qing Meng, Zaiping Guo, Xuebin Yu, Zhixin Chen, Tailiang Guo, Rong Zeng
Synthesis Of Uniform Tio2@Carbon Composite Nanofibers As Anode For Lithium Ion Batteries With Enhanced Electrochemical Performance, Zunxian Yang, Guodong Du, Qing Meng, Zaiping Guo, Xuebin Yu, Zhixin Chen, Tailiang Guo, Rong Zeng
Faculty of Engineering - Papers (Archive)
Very large area, uniform TiO2@carbon composite nanofibers were easily prepared by thermal pyrolysis and oxidization of electrospun titanium(IV) isopropoxide/polyacrylonitrile (PAN) nanofibers in argon. The composite nanostructures exhibit the unique feature of having TiO2 nanocrystals encapsulated inside a porous carbon matrix. The unique orderly-bonded nanostructure, porous characteristics, and highly conductive carbon matrix favour excellent electrochemical performance of the TiO2@carbon nanofiber electrode. The TiO2@carbon hybrid nanofibers exhibited highly reversible capacity of 206 mAh g−1 up to 100 cycles at current density of 30 mA g−1 and excellent cycling stability, indicating that the composite is a promising anode candidate for Li-ion batteries.
Facile Synthesis Of A Interleaved Expanded Graphite-Embedded Sulphur Nanocomposite As Cathode Of Li-S Batteries With Excellent Lithium Storage Performance, Yun-Xiao Wang, Ling Huang, Li-Chao Sun, Su-Yuan Xie, Gui-Liang Xu, Shu-Ru Chen, Yue-Feng Xu, Jun-Tiao Li, Shulei Chou, S. X. Dou, Shi-Gang Sun
Facile Synthesis Of A Interleaved Expanded Graphite-Embedded Sulphur Nanocomposite As Cathode Of Li-S Batteries With Excellent Lithium Storage Performance, Yun-Xiao Wang, Ling Huang, Li-Chao Sun, Su-Yuan Xie, Gui-Liang Xu, Shu-Ru Chen, Yue-Feng Xu, Jun-Tiao Li, Shulei Chou, S. X. Dou, Shi-Gang Sun
Faculty of Engineering - Papers (Archive)
This paper reports the facile synthesis of a unique interleaved expanded graphite-embedded sulphur nanocomposite (S-EG) by melt-diffusion strategy. The SEM images of the S-EG materials indicate the nanocomposites consist of nanosheets with a layer-by-layer structure. Electrochemical tests reveal that the nanocomposite with a sulphur content of 60% (0.6S-EG) can deliver the highest discharge capacity of 1210.4 mAh g−1 at a charge–discharge rate of 280 mA g−1 in the first cycle, the discharge capacity of the 0.6S-EG remains as high as 957.9 mAh g−1 after 50 cycles of charge–discharge. Furthermore, at a much higher charge–discharge rate of 28 A g−1, the …
Impact Of Mechanical Bending On The Electrochemical Performance Of Bendable Lithium Batteries With Paper-Like Free-Standing V2o5-Polypyrrole Cathodes, Lukman Noerochim, Jia-Zhao Wang, David Wexler, Md Mokhlesur Rahman, Jun Chen, Hua-Kun Liu
Impact Of Mechanical Bending On The Electrochemical Performance Of Bendable Lithium Batteries With Paper-Like Free-Standing V2o5-Polypyrrole Cathodes, Lukman Noerochim, Jia-Zhao Wang, David Wexler, Md Mokhlesur Rahman, Jun Chen, Hua-Kun Liu
Faculty of Engineering - Papers (Archive)
Highly flexible, paper-like, free-standing V2O5 and V2O5–polypyrrole (PPy) films were prepared via the vacuum filtration method. The films are soft, lightweight, and mechanically robust. The electrochemical performance of the free-standing pure V2O5 electrode was improved by incorporating conducting polypyrrole. A bendable cell with a novel design was fabricated, consisting of a free-standing V2O5–PPy cathode film, gel electrolyte, and a lithium foil anode. The cell was tested under repeated bending conditions for several cycles. The results show that the battery performance of the repeatedly bent cell was …
Synthesis And Electrochemical Performance Of Liv 3o 8/Polyaniline As Cathode Material For The Lithium Battery, Xuan-Wen Gao, Jia-Zhao Wang, Shulei Chou, Hua-Kun Liu
Synthesis And Electrochemical Performance Of Liv 3o 8/Polyaniline As Cathode Material For The Lithium Battery, Xuan-Wen Gao, Jia-Zhao Wang, Shulei Chou, Hua-Kun Liu
Faculty of Engineering - Papers (Archive)
LiV3O8-polyaniline nanocomposites have been synthesized via chemical oxidative polymerization directed by the anionic surfactant sodium dodecyl benzene sulfate. The polyaniline particles are uniformly coated on the LiV3O8 nanorods. The composite with 12 wt.% polyaniline retains a discharge capacity of 204 mAh g-1 after 100 cycles and had better rate capability (175 mAh g-1 at 2 C and 145 mAh g-1 at 4 C) than the bare LiV3O8 electrode in the potential range of 1.5e4.0 V. The polyaniline coating can buffer the dissolution into the LiPF6 electrode that occurs in LiV3O8 during cycling. The charge transfer resistance of the composite electrode …
Seismic Performance Of Bridges Designed According To As 5100, M Neaz Sheikh, F Legeron, Hing-Ho Tsang
Seismic Performance Of Bridges Designed According To As 5100, M Neaz Sheikh, F Legeron, Hing-Ho Tsang
Faculty of Engineering - Papers (Archive)
Bridges are the critical components of a nation’s transportation system, as closure of an important bridge in the event of an earthquake can disrupt the total transportation network. In Australian standard for bridge design, ASBD (AS 5100-2004), consistent with other major bridge design codes (for example, AASHTO in the USA and CAN/CSA-S6 in Canada), bridges are classified according to their importance levels. The anticipated performances (performance objectives) of the bridges in small to moderate (Return Period, RP= 100 years), design level (RP= 500 years) and large (RP= 2500 years) earthquake events have been specified in major bridge design codes, although …
Performance Of A Novel Osmotic Membrane Bioreactor (Ombr) System: Flux Stability And Removal Of Trace Organics, Abdulhakeem Alturki, James Mcdonald, Stuart J. Khan, Faisal I. Hai, William E. Price, Long Nghiem
Performance Of A Novel Osmotic Membrane Bioreactor (Ombr) System: Flux Stability And Removal Of Trace Organics, Abdulhakeem Alturki, James Mcdonald, Stuart J. Khan, Faisal I. Hai, William E. Price, Long Nghiem
Faculty of Engineering - Papers (Archive)
Results reported here highlight the potential and several challenges in the development of a novel osmotic membrane bioreactor (OMBR) process for the treatment of municipal wastewater. Following the initial gradual decline, a stable permeate flux value was obtained after approximately four days of continuous operation. There was evidence of continuous deterioration of biological activity of the OMBR system, possibly due to the build-up of salinity in the reactor. The removal of 25 out of 27 trace organic compounds with molecular weight higher than 266 g/mol was above 80% and was possibly governed by the interplay between physical separation of the …
Performance And Prediction Of Vacuum Combined Surcharge Consolidation At Port Of Brisbane, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Xueyu Geng, Jayantha Ameratunga, Peter Boyle
Performance And Prediction Of Vacuum Combined Surcharge Consolidation At Port Of Brisbane, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Xueyu Geng, Jayantha Ameratunga, Peter Boyle
Faculty of Engineering - Papers (Archive)
During the past decade, the application of vacuum preloading for stabilising soft coastal clay and other low-lying estuarine soils has become popular in Australia. The cost-effectiveness is a major factor in most projects in view of the significantly reduced time for achieving a relatively high degree of consolidation. Due to an increase in trade activities at the Port of Brisbane, new facilities on Fisherman Islands at the mouth of the Brisbane River will be constructed on the new outer area (235 ha) adjacent to the existing port facilities via land reclamation. A vacuum assisted surcharge load and conventional surcharge scheme …
Tio2(B)@Carbon Composite Nanowires As Anode For Lithium Ion Batteries With Enhanced Reversible Capacity And Cyclic Performance, Zunxian Yang, Guodong Du, Zaiping Guo, Xuebin Yu, Zhixin Chen, Tailiang Guo, Hua-Kun Liu
Tio2(B)@Carbon Composite Nanowires As Anode For Lithium Ion Batteries With Enhanced Reversible Capacity And Cyclic Performance, Zunxian Yang, Guodong Du, Zaiping Guo, Xuebin Yu, Zhixin Chen, Tailiang Guo, Hua-Kun Liu
Faculty of Engineering - Papers (Archive)
Novel TiO2(B)@carbon composite nanowires were simply prepared by a two-step hydrothermal process with subsequent heat treatment in argon. The nanostructures exhibit the unique feature of having TiO2(B) encapsulated inside and an amorphous carbon layer coating the outside. The unique core/shell structure and chemical composition is likely to lead to perfect performance in many applications. In this paper, the results of Li-ion battery testing are presented to demonstrate the superior cyclic performance and rate capability of the TiO2(B)@carbon nanowires. The composite nanowires exhibit a high reversible capacity of 560 mAh g−1 after 100 cycles …
Supply Chain Integration And Collaboration For Performance Improvement: An Agency Theory Approach, Abud Natour, Senevi Kiridena, Peter Gibson
Supply Chain Integration And Collaboration For Performance Improvement: An Agency Theory Approach, Abud Natour, Senevi Kiridena, Peter Gibson
Faculty of Engineering - Papers (Archive)
In today’s challenging business environment, organisations not only need to continue to leverage their internal sources of competitive advantage but also should strive to harness synergies across the multiple supply chains that they are part of. However, this has to be achieved through effective collaboration between partner organisations. This paper contributes to the current scholarly discourse on this topic by the application of the “Agency Theory” to the issues around supply chain integration and collaboration, towards enhancing operational performance. The paper presents a classification of supply chain integration and collaboration, as well as a conceptual framework, for understanding and explaining …
Modelling And Performance Enhancement Of A Linear Actuation Mechanism Using Conducting Polymers, Elise T. Burriss, Gursel Alici, Geoffrey M. Spinks, Scott Mcgovern
Modelling And Performance Enhancement Of A Linear Actuation Mechanism Using Conducting Polymers, Elise T. Burriss, Gursel Alici, Geoffrey M. Spinks, Scott Mcgovern
Faculty of Engineering - Papers (Archive)
In this paper, we report on our investigation into modelling and performance enhancement of a linear actuation system based on cantileveredtype conducting polymer actuators, which can operate in air and aqueous media. We have employed the model to predict the linear displacement and force output of the actuation system, and to determine the optimum values of the system design parameters. The linear actuation system is a five bar parallel mechanism, articulated with two polymer actuators. Kinematic and force analyses of the mechanism including numerical results are presented, and its payload handling ability was experimentally evaluated. The experimental results prove that …
Actions To Improve Coal Seam Gas Drainage Performance, Dennis Black, Najdat I. Aziz
Actions To Improve Coal Seam Gas Drainage Performance, Dennis Black, Najdat I. Aziz
Faculty of Engineering - Papers (Archive)
Coal seam gas drainage is affected by many factors which may be generally divided into two groups, geological factors and operational factors. Studies conducted in the Bulli seam found geological factors had a dominant impact on coal seam gas drainage while operational factors had a secondary impact, affecting the amount of optimum gas drainage performance achieved within the limitations imposed by the prevailing geological conditions. Various operational factors, which are controllable by the mine operator and which have a significant impact on gas drainage effectiveness, are presented and recommendations made to improve and optimise gas drainage performance.
Roadside Rest Area Wastewater Treatment System: Performance Evaluation And Improvement, Adam Kiss, Faisal I. Hai, Long Nghiem
Roadside Rest Area Wastewater Treatment System: Performance Evaluation And Improvement, Adam Kiss, Faisal I. Hai, Long Nghiem
Faculty of Engineering - Papers (Archive)
The performance of a decentralised sewage treatment plant located at a rest area servicing a major freeway was investigated. Long term monitoring and rigorous analyses undertaken in this study revealed several unique and challenging issues associated with such scarcely studied systems. Data collected over a six month period showed that the raw wastewater strength was well above typical household wastewater characteristics, with the average BOD5, COD, TOC, TN and TP values of 880, 4900, 350, 238 and 8 mg/L, respectively. The system performance was considerably lower than that expected of a typical wastewater treatment unit. Several shortcomings in …
Effects Of Polypyrrole On The Performance Of Nickel Oxide Anode Materials For Rechargeable Lithium-Ion Batteries, Nurul H. Idris, Jiazhao Wang, Shulei Chou, Chao Zhong, Md Mokhlesur Rahman, Hua-Kun Liu
Effects Of Polypyrrole On The Performance Of Nickel Oxide Anode Materials For Rechargeable Lithium-Ion Batteries, Nurul H. Idris, Jiazhao Wang, Shulei Chou, Chao Zhong, Md Mokhlesur Rahman, Hua-Kun Liu
Faculty of Engineering - Papers (Archive)
Nickel oxide–polypyrrole (NiO–PPy) composites for lithium-ion batteries were prepared by a chemical polymerization method with sodium p-toluenesulfonate as the dopant, Triton-X as the surfactant, and FeCl3 as the oxidant. The new composite material was characterized by Raman spectroscopy, thermogravimetric analysis, scanning electron microscopy, and field-emission scanning electron microscopy. Nanosize conducting PPy particles with a cauliflower-like morphology were uniformly coated onto the surface of the NiO powder. The electrochemical results were improved for the NiO–PPy composite compared with the pristine NiO. After 30 cycles, the capacities of the NiO and the NiO–PPy composite were about 119 and 436 mAh·g …
The Influence Of Action Learning On Student Perception And Performance, Brad Stappenbelt
The Influence Of Action Learning On Student Perception And Performance, Brad Stappenbelt
Faculty of Engineering - Papers (Archive)
The study of floating oscillating water column (OWC) wave energy conversion (WEC) device performance includes analysis of the dynamic coupling of the water column and the floating structure. In the present investigation, a mechanical oscillator model was proposed in order to examine this relationship for the heave motion of a floating wave energy conversion device. Characterisation of the dynamic system optimal behaviour was performed by examining the effect of relative OWC and floating structure natural frequencies, the phase relationships of the various system components and the optimal power take-off damping of the system. It was determined that separation of the …
Performance Enhancement Of A Complex Chilled Water System Using A Check Valve: Experimental Validation, Shengwei Wang, Zhenjun Ma, Dian-Ce Gao
Performance Enhancement Of A Complex Chilled Water System Using A Check Valve: Experimental Validation, Shengwei Wang, Zhenjun Ma, Dian-Ce Gao
Faculty of Engineering - Papers (Archive)
The large primary–secondary chilled water systems often suffer from the excess flow demand and low chilled water temperature difference, which is known as the low ΔT central plant syndrome, during operation. This paper presents an approach for experimental validation of the possible utility of a check valve (i.e., putting a one-direction check valve in the chilled water by-pass line) to solve this operational problem and enhance the overall system performance, prior to a check valve is really installed. The experimental tests were carried out on the complex central chiller plant in a super high-rise building using a simulated check valve …
Temperature Effect On Microstructure And Electromagnetic Performance Of Polycarbosilane And Sugar-Doped Mgb2 Wires, Andrey V. Shcherbakov, Josip Horvat, Olga V. Shcherbakova, Nikolina Novosel, Emil Babic, S. X. Dou
Temperature Effect On Microstructure And Electromagnetic Performance Of Polycarbosilane And Sugar-Doped Mgb2 Wires, Andrey V. Shcherbakov, Josip Horvat, Olga V. Shcherbakova, Nikolina Novosel, Emil Babic, S. X. Dou
Faculty of Engineering - Papers (Archive)
The effect of processing temperature on structural and superconducting properties of 10 wt.% sugar- and 10 wt.% PCS-doped MgB2 wires is systematically investigated. It is demonstrated that these dopants significantly enhance the electromagnetic performance of Fe-clad MgB2 superconductor and increase its potential for practical application. The enhancement of in-field critical current density (Jc(Ba)) and upper critical field (Bc2) is due to formation of a large amount of lattice defects caused by impurities and C substitution into the MgB2 crystal lattice. High temperature sintering of sugar-doped sample results …
Effect Of Bulk Temperature On The Tribological Performance Of Aqueous Symmetric Tri-Block Copolymers (Ppo-Peo-Ppo And Peo-Ppo-Peo) Based Lubricant, Oyong Novareza, P B. Kosasih, A K. Tieu, Hongtao Zhu
Effect Of Bulk Temperature On The Tribological Performance Of Aqueous Symmetric Tri-Block Copolymers (Ppo-Peo-Ppo And Peo-Ppo-Peo) Based Lubricant, Oyong Novareza, P B. Kosasih, A K. Tieu, Hongtao Zhu
Faculty of Engineering - Papers (Archive)
This work investigates the effect of bulk temperature and the tribological performance of a number of symmetric triblock copolymers on MSI020 commonly in metal forming. It is to determine the best bulk temperature for the lubricants in order to apply in metal fOlming application. The triblock polymers are temperature dependant'. The polymers can be compeletly dissolved in solution since of hydrogen bonding in certain temperature. As temperature increases, the bond is weakend and the polymer break from the water and form dispersion in the water
Soft Soils Improved By Prefabricated Vertical Drains: Performance And Prediction, Buddhima Indraratna, Cholachat Rujikiatkamjorn, V Wijeyakulasuriya, G Mcintosh, R Kelly
Soft Soils Improved By Prefabricated Vertical Drains: Performance And Prediction, Buddhima Indraratna, Cholachat Rujikiatkamjorn, V Wijeyakulasuriya, G Mcintosh, R Kelly
Faculty of Engineering - Papers (Archive)
The use of prefabricated vertical drains with preloading is now common practice and is proving to be one of the most effective ground improvement techniques known. The factors affecting its performance, such as the smear zone, the drain influence zone, and drain unsaturation, are discussed in this paper. In order to evaluate these effects a large scale consolidation test was conducted and it was found that the proposed Cavity Expansion Theory could be used to predict the characteristics of the smear zone based on the soil properties available. Moreover, the procedure for converting an equivalent 2-D plane strain multi-drain analysis …
Performance Of A Prb For The Remediation Of Acidic Groundwater In Acid Sulfate Soil Terrain, Buddhima Indraratna, Gyanendra Regmi, Long Nghiem, A. Golab
Performance Of A Prb For The Remediation Of Acidic Groundwater In Acid Sulfate Soil Terrain, Buddhima Indraratna, Gyanendra Regmi, Long Nghiem, A. Golab
Faculty of Engineering - Papers (Archive)
Contaminated groundwater resulting from pyrite oxidation of acid sulfate soils (ASSs) is a major environmental problem in coastal Australia. A column test was carried out for an extended period with recycled concrete to study the efficiency of the reactive materials for neutralizing acidic groundwater. Results show that the actual acid neutralization capacity of the recycled concrete could decrease to less than 50% of the theoretical value due to armoring effects. Nevertheless, the performance is good as a spot treatment in ASS Terrain using a near-zero cost waste product. Based on the test results and site characterization, a permeable reactive barrier …
Seismic Performance-Based Design Of Bridges With Quantitative Local Performance Criteria, M Neaz Sheikh, Frederic Legeron
Seismic Performance-Based Design Of Bridges With Quantitative Local Performance Criteria, M Neaz Sheikh, Frederic Legeron
Faculty of Engineering - Papers (Archive)
Performance based design of bridges for earthquake resistance is still not explicitly used in design. However, most codes specify a level of performance for bridges under various earthquake inputs. In principle, design rules suggested in the code should meet stipulated performance criteria. However, it has been highlighted in the past that design rules are not directly related with stipulated performance criteria. After the presentation of performance criteria and their relation with post-earthquake functional requirements, the article examines the case of the Canadian Bridge Design Code (CAN/CSA-S6-06). Performance of bridges designed with this code is predicted and compared to expected levels. …
Direct Scattered Growth Of Mwnt On Si For High Performance Anode Material In Li-Ion Batteries, Pengfei Gao, Yanna Nuli, Yu-Shi He, Andrew I. Minett, Jiazhao Wang, Jun Yang, Jun Chen
Direct Scattered Growth Of Mwnt On Si For High Performance Anode Material In Li-Ion Batteries, Pengfei Gao, Yanna Nuli, Yu-Shi He, Andrew I. Minett, Jiazhao Wang, Jun Yang, Jun Chen
Faculty of Engineering - Papers (Archive)
A novel Si-MWNT nanocomposite synthesized via a CVD process shows a high reversible capacity of over 1500 mAh g−1 and stable cycling performance, which can be ascribed to the maintenance of a good conductive network by means of the direct scattered growth and pinning of MWNTs on Si particles.
Performance Comparison Between An Mrf Damper And An Mre Isolator Incorporated With A Building Structure, Yang Zhou, Weihua Li, Muhammad N. S Hadi
Performance Comparison Between An Mrf Damper And An Mre Isolator Incorporated With A Building Structure, Yang Zhou, Weihua Li, Muhammad N. S Hadi
Faculty of Engineering - Papers (Archive)
As an important member of smart materials, magnetorheological elastomers (MREs) exhibit characteristics that their modulus can be controlled by an external magnetic field. Based on these experimental results, a viscoelastic solid model with four parameters was proposed to predict the performance of MRE. A building model, three stories high, was constructed using MATLAB SIMULINK to evaluate the performance of an MRE device in structural control. In addition, the performance of an MRF damper and an MRE device in structural control, where the resultant peak force was selected as a criterion in the evaluation process, was compared and discussed. Two controllers, …