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Articles 841 - 870 of 14367
Full-Text Articles in Social and Behavioral Sciences
Functional Liquid Metal Nanoparticles Produced By Liquid-Based Nebulization, Shiyang Tang, Ruirui Qiao, Yiliang Lin, Yuhuan Li, Qianbin Zhao, Dan Yuan, Guolin Yun, Jinhong Guo, Michael Dickey, Tony Jun Huang, Thomas P. Davis, Kourosh Kalantar-Zadeh, Weihua Li
Functional Liquid Metal Nanoparticles Produced By Liquid-Based Nebulization, Shiyang Tang, Ruirui Qiao, Yiliang Lin, Yuhuan Li, Qianbin Zhao, Dan Yuan, Guolin Yun, Jinhong Guo, Michael Dickey, Tony Jun Huang, Thomas P. Davis, Kourosh Kalantar-Zadeh, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part B
Functional liquid metal nanoparticles (NPs), produced from eutectic alloys of gallium, promise new horizons in the fields of sensors, microfluidics, flexible electronics, catalysis, and biomedicine. Here, the development of a vapor cavity generating ultrasonic platform for nebulizing liquid metal within aqueous media for the one-step production of stable and functional liquid metal NPs is shown. The size distribution of the NPs is fully characterized and it is demonstrated that various macro and small molecules can also be grafted onto these liquid metal NPs during the liquid-based nebulization process. The cytotoxicity of the NPs grafted with different molecules is further explored. …
Experimental Comparison Of Green Facades With Outdoor Test Cells During A Hot Humid Season, Georgios Kokogiannakis, Jo Darkwa, Sofia Badeka, Yilin Li
Experimental Comparison Of Green Facades With Outdoor Test Cells During A Hot Humid Season, Georgios Kokogiannakis, Jo Darkwa, Sofia Badeka, Yilin Li
Faculty of Engineering and Information Sciences - Papers: Part B
We used outdoor test cells during a hot humid period to analyse the surface temperatures behind the following four types of green walls: a felt layer wall; a planter boxes wall; a direct climbing plants wall, and; an indirect climbing plants wall. We compared these temperatures with temperatures of a bare wall and we found that all four types of green facades were able to maintain lower temperatures than the bare wall, and that the felt layer and planter boxes wall had lower temperatures than the other walls for the majority of the study period. In particular, the daily average …
Diffraction Line Profile Analysis Of 3d Wedge Samples Of Ti-6al-4v Fabricated Using Four Different Additive Manufacturing Processes, Ryan Cottam, Suresh Palanisamy, Maxim Avdeev, Tom Jarvis, Chad Henry, Dominic Cuiuri, Levente Balogh, Rizwan Rashid
Diffraction Line Profile Analysis Of 3d Wedge Samples Of Ti-6al-4v Fabricated Using Four Different Additive Manufacturing Processes, Ryan Cottam, Suresh Palanisamy, Maxim Avdeev, Tom Jarvis, Chad Henry, Dominic Cuiuri, Levente Balogh, Rizwan Rashid
Faculty of Engineering and Information Sciences - Papers: Part B
Wedge‐-shaped samples were manufactured by four different Additive Manufacturing (AM) processes, namely selective laser melting (SLM), electron beam melting (EBM), direct metal deposition (DMD), and wire and arc additive manufacturing (WAAM), using Ti‐-6Al‐-4V as the feed material. A high‐-resolution powder diffractometer was used to measure the diffraction patterns of the samples whilst rotated about two axes to collect detected neutrons from all possible lattice planes. The diffraction pattern of a LaB6 standard powder sample was also measured to characterize the instrumental broadening and peak shapes necessary for the Diffraction Line Profile Analysis. The line profile analysis was conducted using the …
An Improved Lssvm Model For Intelligent Prediction Of The Daily Water Level, Tao Guo, Wei He, Zhonglian Jiang, Xiumin Chu, Reza Malekian, Zhixiong Li
An Improved Lssvm Model For Intelligent Prediction Of The Daily Water Level, Tao Guo, Wei He, Zhonglian Jiang, Xiumin Chu, Reza Malekian, Zhixiong Li
Faculty of Engineering and Information Sciences - Papers: Part B
Daily water level forecasting is of significant importance for the comprehensive utilization of water resources. An improved least squares support vector machine (LSSVM) model was introduced by including an extra bias error control term in the objective function. The tuning parameters were determined by the cross-validation scheme. Both conventional and improved LSSVM models were applied in the short term forecasting of the water level in the middle reaches of the Yangtze River, China. Evaluations were made with both models through metrics such as RMSE (Root Mean Squared Error), MAPE (Mean Absolute Percent Error) and index of agreement (d). More accurate …
Precipitation Strengthening In Ni-Cu Alloys Fabricated Using Wire Arc Additive Manufacturing Technology, Olexandra Marenych, Andrii Kostryzhev, Chen Shen, Zengxi Stephen Pan, Hui Jun Li, Stephen Van Duin
Precipitation Strengthening In Ni-Cu Alloys Fabricated Using Wire Arc Additive Manufacturing Technology, Olexandra Marenych, Andrii Kostryzhev, Chen Shen, Zengxi Stephen Pan, Hui Jun Li, Stephen Van Duin
Faculty of Engineering and Information Sciences - Papers: Part B
Two Ni-Cu alloys, Monel K500 and FM60, with various contents of Ti, Mn, Al, Fe and C were deposited in the form of plates on a metal base plate using wire arc additive manufacturing technology. Three deposition speeds have been applied: 300, 400 and 500 mm/min. To modify the as-welded microstructure and properties, the deposited walls/plates have been subjected to two heat treatment procedures: annealing at 1100◦C for 15 min, slow cooling to 610◦C, ageing at this temperature for 8 h and either (i) air cooling to room temperature or (ii) slow cooling to 480◦C, ageing at this temperature for …
Optimisation Of Life Cycle Performance Of A Double-Pass Photovoltaic Thermal-Solar Air Heater With Heat Pipes, Wenke Fan, Georgios Kokogiannakis, Zhenjun Ma
Optimisation Of Life Cycle Performance Of A Double-Pass Photovoltaic Thermal-Solar Air Heater With Heat Pipes, Wenke Fan, Georgios Kokogiannakis, Zhenjun Ma
Faculty of Engineering and Information Sciences - Papers: Part B
A double pass photovoltaic thermal-solar air heater (PVT-SAH) system integrated with heat pipes was developed with the aim of using it for applications that require high-temperature air. A dynamic model was first developed and validated to predict the electrical and thermal performance of the PVT-SAH system with heat pipes and inform an analysis of economic benefits. A life-cycle saving method was employed, and an uncertainty analysis was included to investigate the economic performance of the proposed system in comparison with the performance of a benchmark design. The optimal designs for maximising electrical and thermal efficiencies of the new PVT-SAH system …
Unveiling Oil-Additive/Surface Hierarchy At Real Ring-Liner Contact, Shanhong Wan, Yana Xia, The Sang Pham, Anh Kiet Tieu, Hongtao Zhu, Qinglin Li
Unveiling Oil-Additive/Surface Hierarchy At Real Ring-Liner Contact, Shanhong Wan, Yana Xia, The Sang Pham, Anh Kiet Tieu, Hongtao Zhu, Qinglin Li
Faculty of Engineering and Information Sciences - Papers: Part B
Zinc-dialkyldithiophosphate (ZDDP) additive in oil has been extensively reported to form a protective tribofilm between the moving components of engine for preventing wear. In this study, surface and interface characterizations were conducted on real piston ring/cylinder liner contacts, the interacting mechanism between oil-additive and solid surfaces under realistic mechanical and thermal conditions was predicted according to the identification of the chemical composition and structure of the tribofilm. The results demonstrate the interesting laminated hierarchy of tribofilm. This tribofilm is composed mainly of dense carbon precipitation at the top region and a thinner polyphosphate intermediate layer in contact with deformed iron …
Ultra-Stretchable Mwcnt-Ecoflex Piezoresistive Sensors For Human Motion Detection Applications, Huy Mai, Rahim Mutlu, Charbel Tawk, Gursel Alici, Vitor Sencadas
Ultra-Stretchable Mwcnt-Ecoflex Piezoresistive Sensors For Human Motion Detection Applications, Huy Mai, Rahim Mutlu, Charbel Tawk, Gursel Alici, Vitor Sencadas
Faculty of Engineering and Information Sciences - Papers: Part B
Ultra-stretchable sensors are highly desirable for wearable electronic applications. In this paper, we manufactured self-standing piezoresistive sensors using a simple method based on blending multiwall carbon nanotubes (MWCNTs) with a stretchable elastomeric matrix (Ecoflex). The sensors showed a low electrical percolation threshold of 0.3 wt%, with an elastic modulus as soft as the human skin in the forearm and palm dermis. An increase in the cross-linking degree of the matrix from 17.43 ± 0.20 mol/m 3 up to 28.55 ± 2.07 mol/m 3 was observed with the incorporation of MWCNTs, revealing that the conductive filler is covalently bonded to the …
Probing Fretting Performance Of Dlc And Mos2 Films Under Fluid Lubrication, Wenhua Zhuang, Hao Li, Wen Li, Xiaoqiang Fan, Jifan He, Zhenbing Cai, Wang Fu, Guangan Zhang, Shanhong Wan, Minhao Zhu
Probing Fretting Performance Of Dlc And Mos2 Films Under Fluid Lubrication, Wenhua Zhuang, Hao Li, Wen Li, Xiaoqiang Fan, Jifan He, Zhenbing Cai, Wang Fu, Guangan Zhang, Shanhong Wan, Minhao Zhu
Faculty of Engineering and Information Sciences - Papers: Part B
Transition from onefold to synergistic lubrication for solving fretting wear and fatigue problems is of great practical significance, because fluids can regulate fretting regime for minimizing wear, solid films can restrain nucleation and formation of crack. Here synergistic lubrication coatings were prepared using diamond-like carbon (DLC) and molybdenum disulfide (MoS2) films as anti-wear/fatigue layer, and high-performance lubricants (including silicone oil, ionic liquids, multialkylated cyclopentanes and perfluoropolyethers (PFPE)) as flowable lubrication layer. Their fretting performance was evaluated in detail and fretting mechanism was revealed by surface/interface analysis techniques. Results determine the synergistic lubrication coatings with good anti-wear and anti-fatigue abilities, deriving …
Theoretical Analysis Of Electrochemical Noise Measurement With Single Substrate Electrode Configuration And Examination Of The Effect Of Reference Electrodes, Thomas Jurak, Sina S. Jamali, Yue Zhao
Theoretical Analysis Of Electrochemical Noise Measurement With Single Substrate Electrode Configuration And Examination Of The Effect Of Reference Electrodes, Thomas Jurak, Sina S. Jamali, Yue Zhao
Faculty of Engineering and Information Sciences - Papers: Part B
The development of the single substrate technique presents a realistic possibility of utilising electrochemical noise measurement for on-site evaluations of corrosion behaviour. A theoretical model was developed to further understand the effects of reference electrodes on the acquired data to increase confidence in the technique. The model demonstrates that the reference electrodes can have a significant impact on the measurements, resulting in erroneous values if the reference electrodes are not selected carefully. Furthermore, the derived equations elucidate how to limit/remove such influence, facilitating accurate application of the single substrate technique on bare metal and coated substrates both in laboratories and …
A Highly Stiffness-Adjustable Robot Leg For Enhancing Locomotive Performance, Matthew Christie, Shuaishuai Sun, Donghong Ning, Haiping Du, S Zhang, Weihua Li
A Highly Stiffness-Adjustable Robot Leg For Enhancing Locomotive Performance, Matthew Christie, Shuaishuai Sun, Donghong Ning, Haiping Du, S Zhang, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part B
Of the recent developments in legged robotics, compliance control of legs has potential to make a huge impact in the transition from simple mechanisms to life-like machines. Given the nature of legged locomotion in humans and animals involves such compliance control, this is a step forward in terms of the artificial embodiment of the biological traits that make these living beings superior to the robots we have today. Taking a literal Rolling Spring Loaded Inverted Pendulum (R-SLIP) morphology, this work proposes a magnetorheological-fluid-centric (MRF) variable stiffness leg, aiming to further investigate this area and take advantage of the improved energy …
A Generalised Bayesian Inference Method For Maritime Surveillance Using Historical Data, Jia Li, Xiumin Chu, Wei He, Feng Ma, Reza Malekian, Zhixiong Li
A Generalised Bayesian Inference Method For Maritime Surveillance Using Historical Data, Jia Li, Xiumin Chu, Wei He, Feng Ma, Reza Malekian, Zhixiong Li
Faculty of Engineering and Information Sciences - Papers: Part B
In practice, maritime monitoring systems rely on manual work to identify the authenticities, risks, behaviours and importance of moving objects, which cannot be obtained directly through sensors, especially from marine radar. This paper proposes a generalised Bayesian inference-based artificial intelligence that is capable of identifying these patterns of moving objects based on their dynamic attributes and historical data. First of all, based on dependable prior data, likelihood information about objects of interest is obtained in terms of dynamic attributes, such as speed, direction and position. Observations on these attributes of a new object can be obtained as pieces of evidence …
Dean-Flow-Coupled Elasto-Inertial Particle And Cell Focusing In Symmetric Serpentine Microchannels, Dan Yuan, Ronald Sluyter, Qianbin Zhao, Shiyang Tang, Sheng Yan, Guolin Yun, Ming Li, Jun Zhang, Weihua Li
Dean-Flow-Coupled Elasto-Inertial Particle And Cell Focusing In Symmetric Serpentine Microchannels, Dan Yuan, Ronald Sluyter, Qianbin Zhao, Shiyang Tang, Sheng Yan, Guolin Yun, Ming Li, Jun Zhang, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part B
This work investigates particle focusing under Dean-flow-coupled elasto-inertial effects in symmetric serpentine microchannels. A small amount of polymers were added to the sample solution to tune the fluid elasticity, and allow particles to migrate laterally and reach their equilibriums at the centerline of a symmetric serpentine channel under the synthesis effect of elastic, inertial and Dean-flow forces. First, the effects of the flow rates on particle focusing in viscoelastic fluid in serpentine channels were investigated. Then, comparisons with particle focusing in the Newtonian fluid in the serpentine channel and in the viscoelastic fluid in the straight channel were conducted. The …
Coating Film Profiles Generated By Fluctuating Location Of The Wiping Pressure And Shear Stress, Andrew D. Johnstone, Buyung Kosasih, Le Quang Phan, Andrew E. Dixon, Wayne A. Renshaw
Coating Film Profiles Generated By Fluctuating Location Of The Wiping Pressure And Shear Stress, Andrew D. Johnstone, Buyung Kosasih, Le Quang Phan, Andrew E. Dixon, Wayne A. Renshaw
Faculty of Engineering and Information Sciences - Papers: Part B
Impinging planar jets are a widely used means of removing excess drag-out coating material from steel strip in order to control the final thickness of the applied coating. A wide range of possible coating defects are known to occur for this process, many of which are suspected to have their origin in the spatio-temporal characteristics of the air jets. It is therefore of interest to improve understanding of the link between the unsteady flow behaviour inherent to impinging jets and the evolution of the coating free surface produced by the gas-wiping process. In this paper, the coating response, characterised by …
Synergistic Tribological Performance Of A Water Based Lubricant Using Graphene Oxide And Alumina Hybrid Nanoparticles As Additives, Shuiquan Huang, Anshun He, Jung-Ho Yun, Xuefeng Xu, Zhengyi Jiang, Sihai Jiao, Han Huang
Synergistic Tribological Performance Of A Water Based Lubricant Using Graphene Oxide And Alumina Hybrid Nanoparticles As Additives, Shuiquan Huang, Anshun He, Jung-Ho Yun, Xuefeng Xu, Zhengyi Jiang, Sihai Jiao, Han Huang
Faculty of Engineering and Information Sciences - Papers: Part B
Graphene oxide (GO) and alumina (Al 2 O 3 ) nanoparticles were added in deionized water in order to synthesise a dimensionally integrated nanolubricant. Tribological tests were performed using an alloy/stainless steel contact pair. A 0.12 wt% 1:1 GO-Al 2 O 3 lubricant produced 64% and 47% reductions in the COF as well as 63% and 60% improvements in the Ra compared with 0.06 wt% Al 2 O 3 and 0.06 wt% GO solutions. Analysis of the worn surface indicated that a thin film consisting of a layer of GO and a tribo-layer of Al 2 O 3 was formed …
Integrated Trajectory Planning And Control For Obstacle Avoidance Manoeuvre Using Non-Linear Vehicle Mp Algorithm, Boyuan Li, Haiping Du, Weihua Li, Bangji Zhang
Integrated Trajectory Planning And Control For Obstacle Avoidance Manoeuvre Using Non-Linear Vehicle Mp Algorithm, Boyuan Li, Haiping Du, Weihua Li, Bangji Zhang
Faculty of Engineering and Information Sciences - Papers: Part B
In the current literature, model-predictive (MP) algorithm is widely applied in autonomous vehicle trajectory planning and control but most of the current studies only apply the linear tyre model, which cannot accurately present the tyre non-linear characteristic. Furthermore, most of these studies separately consider the trajectory planning and trajectory control of the autonomous vehicle and few of them have integrated the trajectory planning and trajectory control together. To fill in above research gaps, this study proposes the integrated trajectory planning and trajectory control method using a non-linear vehicle MP algorithm. To fully utilise the advantages of four-wheel-independent-steering and four-wheel-independent-driving vehicle, …
Future Power Distribution Grids: Integration Of Renewable Energy, Energy Storage, Electric Vehicles, Superconductor, And Magnetic Bus, Kashem M. Muttaqi, Md Rabiul Islam, Danny Sutanto
Future Power Distribution Grids: Integration Of Renewable Energy, Energy Storage, Electric Vehicles, Superconductor, And Magnetic Bus, Kashem M. Muttaqi, Md Rabiul Islam, Danny Sutanto
Faculty of Engineering and Information Sciences - Papers: Part B
This paper focuses on a review of the state of the art of future power grids, where new and modern technologies will be integrated into the power distribution grid, and will become the future key players for electricity generation, transmission, and distribution. The current power grids are undergoing an unprecedented transformation from the original design, changing the way how energy has been produced, delivered, and consumed over the past century. This new energy era includes the integration of renewable sources such as wind and solar, supported by the distributed or community energy storage, to power distribution grids through innovative high-frequency …
Modeling For Optical Feedback Laser Diode Operating In Period-One Oscillation And Its Application, Bin Liu, Yuxi Ruan, Yanguang Yu, Qinghua Guo, Jiangtao Xi, Jun Tong
Modeling For Optical Feedback Laser Diode Operating In Period-One Oscillation And Its Application, Bin Liu, Yuxi Ruan, Yanguang Yu, Qinghua Guo, Jiangtao Xi, Jun Tong
Faculty of Engineering and Information Sciences - Papers: Part B
An optical feedback laser diode (OFLD) operating in period-one oscillation (POO) with a moving external target is investigated by exploring its potential sensing capability. First, the modeling of an OFLD-POO sensing system is presented. An analytical expression is derived for OFLD-POO sensing signal, from which a new displacement measurement method is developed. The proposed sensing model is verified by the well-known Lang-Kobayashi equations used to describe the dynamic behavior of a laser with optical feedback. Then, an experimental OFLD-POO system is built in order to demonstrate an application example for displacement sensing. The measurement results show that the OFLD-POO sensing …
Axial-Flexural Interaction Diagram Of Rpc Columns Reinforced With Steel Fibres, Ahmed Al-Tikrite, Muhammad N. S Hadi
Axial-Flexural Interaction Diagram Of Rpc Columns Reinforced With Steel Fibres, Ahmed Al-Tikrite, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part B
This paper presents analytical modelling of the axial-flexural behaviour of Reactive Powder Concrete (RPC) columns reinforced with and without steel fibres of different types (industrial and waste) in individual and hybrid forms. An analytical stress-strain model for unconfined RPC was used for the analysis of the axial loads and bending moments of the fibrous RPC columns. The layer-by-layer numerical integration method was used to calculate the axial load and bending moments in this study. The analytically developed axial load-bending moment ( P-M ) interaction diagrams were validated by using experimental results from the literature. A para- metric study was carried …
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 …
A Research Of Monte Carlo Optimized Neural Network For Electricity Load Forecast, Binbin Yong, Liang Huang, Fucun Li, Jun Shen, Xin Wang, Qingguo Zhou
A Research Of Monte Carlo Optimized Neural Network For Electricity Load Forecast, Binbin Yong, Liang Huang, Fucun Li, Jun Shen, Xin Wang, Qingguo Zhou
Faculty of Engineering and Information Sciences - Papers: Part B
In this paper, we apply the Monte Carlo neural network (MCNN), a type of neural network optimized by Monte Carlo algorithm, to electricity load forecast. Meanwhile, deep MCNNs with one, two and three hidden layers are designed. Results have demonstrated that three-layer MCNN improves 70.35% accuracy for 7-week electricity load forecast, compared with traditional neural network. And five-layer MCNN improves 17.24% accuracy for 7-week forecast. This proves that MCNN has great potential in electricity load forecast.
A Fully Trainable Network With Rnn-Based Pooling, Shuai Li, Wanqing Li, Christopher David Cook, Ce Zhu, Yanbo Gao
A Fully Trainable Network With Rnn-Based Pooling, Shuai Li, Wanqing Li, Christopher David Cook, Ce Zhu, Yanbo Gao
Faculty of Engineering and Information Sciences - Papers: Part B
Pooling is an important component in convolutional neural networks (CNNs) for aggregating features and reducing computational burden. Compared with other components such as convolutional layers and fully connected layers which are completely learned from data, the pooling component is still handcrafted such as max pooling and average pooling. This paper proposes a learnable pooling function using recurrent neural networks (RNN) so that the pooling can be fully adapted to data and other components of the network, leading to an improved performance. Such a network with learnable pooling function is referred to as a fully trainable network (FTN). Experimental results demonstrate …
Characterizing Deformation Behaviour Of An Oxidized High Speed Steel: Effects Of Nanoindentation Depth, Friction And Oxide Scale Porosity, Guanyu Deng, Anh Kiet Tieu, Lihong Su, Hongtao Zhu, Qiang Zhu, W Wan Zamri, Charlie Kong
Characterizing Deformation Behaviour Of An Oxidized High Speed Steel: Effects Of Nanoindentation Depth, Friction And Oxide Scale Porosity, Guanyu Deng, Anh Kiet Tieu, Lihong Su, Hongtao Zhu, Qiang Zhu, W Wan Zamri, Charlie Kong
Faculty of Engineering and Information Sciences - Papers: Part B
In the present paper, a systematic study on the deformation behaviour of an oxidized high speed steel (HSS) during nanoindentation has been conducted. Specimens cut from a HSS work roll were oxidized first to develop the oxide layer with thickness close to that built up on a HSS work roll surface during hot rolling in industry. Then, nanoindentation tests with three typical peak loads from low to high (namely 2 mN, 20 mN, and 200 mN) were conducted on the oxide scale surface. Porosity in oxide scale and its surface morphology features were examined by transmission electron microscopy (TEM) and …
A Combined Experiment And Crystal Plasticity Fem Study Of Microstructure And Texture In Aluminium Processed By Reverse And Unidirectional Accumulative Roll-Bonding, Hui Wang, Cheng Lu, Anh Kiet Tieu
A Combined Experiment And Crystal Plasticity Fem Study Of Microstructure And Texture In Aluminium Processed By Reverse And Unidirectional Accumulative Roll-Bonding, Hui Wang, Cheng Lu, Anh Kiet Tieu
Faculty of Engineering and Information Sciences - Papers: Part B
In this report, reverse accumulative roll-bonding (ARB) was conducted for the first time. It was found that the microstructure after reverse ARB was relatively coarser than that after unidirectional ARB, and texture intensity was slightly weaker. In addition to the experimental study, the crystal plasticity finite element method was applied to the ARB-processed polycrystalline aluminium. The simulation followed the real deformation of reverse ARB and unidirectional ARB, and the predictions were validated by the experimental observations. Compared to the second cycle of unidirectional ARB, the crystal orientations (after the first cycle) were relatively unstable during the second cycle of reverse …
The Effect Of Raster Orientation On The Static And Fatigue Properties Of Filament Deposited Abs Polymer, Natalie Jap, Garth Pearce, Alan K. Hellier, Nicholas Russell, William C. H Parr, William R. Walsh
The Effect Of Raster Orientation On The Static And Fatigue Properties Of Filament Deposited Abs Polymer, Natalie Jap, Garth Pearce, Alan K. Hellier, Nicholas Russell, William C. H Parr, William R. Walsh
Faculty of Engineering and Information Sciences - Papers: Part B
Fused Filament Fabrication (FFF) is a cheap, accessible and common Additive Manufacturing (AM) technique. FFF is highly flexible, robust and uses stable and easily transportable precursor materials. Although the static mechanical properties of FFF components are well documented, the dynamic mechanical properties are still not fully established. It was identified that raster orientation was a significant factor in determining tensile strength, and thus could also affect fatigue strength. Dogbone specimens of Acrylonitrile Butadiene Styrene (ABS) were tested under sinusoidal tension-tension fatigue loading at a frequency of 5 Hz, and at 40%, 60%, 80% and 90% of the mean ultimate tensile …
An Agglomerative Hierarchical Clustering-Based Strategy Using Shared Nearest Neighbours And Multiple Dissimilarity Measures To Identify Typical Daily Electricity Usage Profiles Of University Library Buildings, Kehua Li, Rebecca Yang, Duane A. Robinson, Jun Ma, Zhenjun Ma
An Agglomerative Hierarchical Clustering-Based Strategy Using Shared Nearest Neighbours And Multiple Dissimilarity Measures To Identify Typical Daily Electricity Usage Profiles Of University Library Buildings, Kehua Li, Rebecca Yang, Duane A. Robinson, Jun Ma, Zhenjun Ma
Faculty of Engineering and Information Sciences - Papers: Part B
This study presents an agglomerative hierarchical clustering-based strategy using Shared Nearest Neighbours and multiple dissimilarity measures to identify typical daily electricity usage profiles of university library buildings. The proposed strategy takes the advantages of three dissimilarity measures (i.e. Euclidean distance, Pearson distance and Chebyshev distance) to calculate the difference between daily electricity usage profiles. Two-year hourly electricity usage data collected from two different university library buildings were employed to evaluate the performance of this strategy. It was shown that this strategy, which considered both magnitude dissimilarity and variation dissimilarity simultaneously, can identify more informative typical daily electricity usage profiles, in …
Experimental And Self-Consistent Modeling Study Of De-Twinning In A Twinning-Induced Plasticity Steel, Ahmed A. Saleh, Wei Wen, Elena V. Pereloma, Scott Mccormack, Carlos N. Tome, Azdiar Adil Gazder
Experimental And Self-Consistent Modeling Study Of De-Twinning In A Twinning-Induced Plasticity Steel, Ahmed A. Saleh, Wei Wen, Elena V. Pereloma, Scott Mccormack, Carlos N. Tome, Azdiar Adil Gazder
Faculty of Engineering and Information Sciences - Papers: Part B
The effect of compression-tension loading on the microstructure evolution in a fully annealed Fe-24Mn-3Al-2Si-1Ni-0.06C twinning-induced plasticity steel has been investigated. Electron back-scattering diffraction was used to track a region of interest at true strains of 0 (initial), − 0.09 (after forward compression loading), and 0.04 (after reverse tension loading). All deformation twins detected after forward compression loading were found to de-twin upon subsequent reverse tension loading, likely due to the reverse glide of partial dislocations bounding the twins. The reverse loading behavior, including the twinning and de-twinning processes, was successfully simulated using a recently modified dislocation-based hardening model embedded in …
Compressive Behaviour Of Frp-Confined Rubber Concrete, Chun Wa Chan, Tao Yu, S S. Zhang, Qingfeng Xu
Compressive Behaviour Of Frp-Confined Rubber Concrete, Chun Wa Chan, Tao Yu, S S. Zhang, Qingfeng Xu
Faculty of Engineering and Information Sciences - Papers: Part B
Extensive research has been conducted on the use of tyre-derived products (e.g. rubber crumb and granule) to replace aggregates in producing concrete (i.e. rubber concrete). However, rubber concrete has so far been mainly limited to non-structural applications due to its well-known disadvantages including the relatively low stiffness and strength as well as early cracking as a result of lack of proper bonding between rubber and the paste matrix. The weaknesses of rubber concrete may be minimised in a hybrid column through lateral confinement by a fibre-reinforced polymer (FRP) tube and longitudinal reinforcement by steel or FRP. This paper presents an …
Selective Atomic-Level Etching On Short S-Glass Fibres To Control Interfacial Properties For Restorative Dental Composites, Kiho Cho, Guannan Wang, Raju Raju, Jian Fang, Ginu Rajan, Martina Stenzel, Paul Farrar, Gangadhara B. Prusty
Selective Atomic-Level Etching On Short S-Glass Fibres To Control Interfacial Properties For Restorative Dental Composites, Kiho Cho, Guannan Wang, Raju Raju, Jian Fang, Ginu Rajan, Martina Stenzel, Paul Farrar, Gangadhara B. Prusty
Faculty of Engineering and Information Sciences - Papers: Part B
Interfacial bonding between fibre and matrix is most critical to obtain enhanced mechanical properties of the resulting composites. Here we present a new surface tailoring method of selective wet etching and organosilicon monomers (3-(Trimethoxysilyl) propyl methacrylate, TMSPMA) deposition process on the short S-Glass fibre as a reinforcing material, resulting in increased mechanical retention and strong chemical bonding between glass fibres and polymer resin (a mixture of triethylene glycol dimethacrylate (TEGDMA) and urethane dimethacrylate (UDMA) monomers). The effect of surface modification on fibre matrix interfacial strength was investigated through microdroplet tests. An S-Glass fibre treated with piranha solution (a mixture of …
A Data Dependency And Access Threshold Based Replication Strategy For Multi-Cloud Workflow Applications, Fei Xie, Jun Yan, Jun Shen
A Data Dependency And Access Threshold Based Replication Strategy For Multi-Cloud Workflow Applications, Fei Xie, Jun Yan, Jun Shen
Faculty of Engineering and Information Sciences - Papers: Part B
Data replication is one of the significant sub-areas of data management in cloud based workflows. Data-intensive workflow applications can gain great benefits from cloud environments and usually need data management strategies to manage large amounts of data. At the same time, multi-cloud environments become more and more popular. We propose a cost-effective and threshold-based data replication strategy with the consideration of both data dependency and data access times for data-intensive workflows in the multi-cloud environment. Finally, the simulation results show that our approach can greatly reduce total cost of data-intensive workflow applications by considering both of data dependency and data …