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Full-Text Articles in Engineering
Quantum Beam Science-Applications To Probe Or Influence Matter And Materials, Klaus-Dieter Liss
Quantum Beam Science-Applications To Probe Or Influence Matter And Materials, Klaus-Dieter Liss
Faculty of Engineering and Information Sciences - Papers: Part A
The concept of quantum beams unifies a multitude of different kinds of radiation that can be considered as both waves and particles, according to the quantum mechanical model. Examples include light, in the form of X-rays and synchrotron radiation, as well as neutrons, electrons, positrons, muons, protons, ions, and photons. While the past century saw the discovery of these types of radiation and particles along with the investigations of their physical properties and their fundamental interaction with matter, the current century focuses extensively on their applications to characterize and understand materials in their broadest context, under all imaginable conditions. X-rays …
State Of The Art Of Control Schemes For Smart Systems Featuring Magneto-Rheological Materials, Seung-Bok Choi, Weihua Li, Miao Yu, Haiping Du, Jie Fu, Phu Xuan Do
State Of The Art Of Control Schemes For Smart Systems Featuring Magneto-Rheological Materials, Seung-Bok Choi, Weihua Li, Miao Yu, Haiping Du, Jie Fu, Phu Xuan Do
Faculty of Engineering and Information Sciences - Papers: Part A
This review presents various control strategies for application systems utilizing smart magneto-rheological fluid (MRF) and magneto-rheological elastomers (MRE). It is well known that both MRF and MRE are actively studied and applied to many practical systems such as vehicle dampers. The mandatory requirements for successful applications of MRF and MRE include several factors: advanced material properties, optimal mechanisms, suitable modeling, and appropriate control schemes. Among these requirements, the use of an appropriate control scheme is a crucial factor since it is the final action stage of the application systems to achieve the desired output responses. There are numerous different control …
A New Micro Scale Fe Model Of Crystalline Materials In Micro Forming Process, Liang Luo, Haibo Xie, Dongbin Wei, Xiaogang Wang, Cunlong Zhou, Zhengyi Jiang
A New Micro Scale Fe Model Of Crystalline Materials In Micro Forming Process, Liang Luo, Haibo Xie, Dongbin Wei, Xiaogang Wang, Cunlong Zhou, Zhengyi Jiang
Faculty of Engineering and Information Sciences - Papers: Part A
Micro forming of metals has drawn global attention due to the increasing requirement of micro metal products. However, the size effects become significant in micro forming processes and affect the application of finite element (FE) simulation of micro forming processes. Dividing samples into small areas according to their microstructures and assigning individual properties to each small area are a possible access to micro forming simulation considering material size effects. In this study, a new model that includes both grains and their boundaries was developed based on the observed microstructures of samples. The divided subareas in the model have exact shapes …
Microscale Mechanical Behaviour Of Ultra-Fine-Grained Materials Processed By High-Pressure Torsion, Klaus-Dieter Liss
Microscale Mechanical Behaviour Of Ultra-Fine-Grained Materials Processed By High-Pressure Torsion, Klaus-Dieter Liss
Faculty of Engineering and Information Sciences - Papers: Part A
A special networking seminar was given by Associate Professor Megumi Kawasaki from Hanyang University, South Korea. The seminar covered microscale mechanical behaviour of ultrafine- grained materials processed by high-pressure torsion, and was co-organised by the School of Mechanical, Materials and Mechatronic Engineering (MMME), University of Wollongong and Materials Australia NSW. The event was hosted on 20 September 2016 at a sponsored networking tea by MMME.
Effects Of Sintering Materials And Gas Conditions On Formation Of Silico-Ferrites Of Calcium And Aluminium During Iron Ore Sintering, Zhe Wang, David J. Pinson, Sheng Chew, Brian J. Monaghan, Mark Pownceby, Nathan A.S. Webster, Harold P. Rogers, Guangqing Zhang
Effects Of Sintering Materials And Gas Conditions On Formation Of Silico-Ferrites Of Calcium And Aluminium During Iron Ore Sintering, Zhe Wang, David J. Pinson, Sheng Chew, Brian J. Monaghan, Mark Pownceby, Nathan A.S. Webster, Harold P. Rogers, Guangqing Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
Silico-ferrites of calcium and aluminium (SFCA) are desirable phases in a high quality iron ore sinter product. The effects of sintering temperature, CaO/SiO2 ratio, sintering gas atmosphere and cooling procedure on the phase composition of sintered specimens from an industrial sinter blend were examined with focus on the formation of SFCA phases. The proportions of mineral phases in specimens sintered at 1 250-1 325°C were quantitatively examined using image analysis. SFCA can be formed at low temperatures by solid state reactions, the formation of which was enhanced by increasing temperature. Further increasing sintering temperature promoted the reduction of Fe3+ in …
Nano-Enhanced Phase Change Materials For Improved Building Performance, Zhenjun Ma, Wenye Lin, Mohammed I. Sohel
Nano-Enhanced Phase Change Materials For Improved Building Performance, Zhenjun Ma, Wenye Lin, Mohammed I. Sohel
Faculty of Engineering and Information Sciences - Papers: Part A
Nano-enhanced phase change materials (PCMs) have attracted increasing attention to address one of the key barriers (i.e. low thermal conductivity) to the wide adoption of PCMs in many industrial applications. This paper discusses the generic problem and key issues associated with appropriately using this new class of materials in buildings for effective thermal management and improved energy performance. An overview on major recent development and application of nano-enhanced PCMs as thermal energy storage media is provided. A case study based on a PCM ceiling ventilation system integrated with solar photovoltaic thermal (PVT) collectors is then performed to evaluate the potential …
Thermal Performance Evaluation And Optimal Design Of Buildings With Integrated Air-Based Photovoltaic Thermal Collectors And Phase Change Materials Using The Hooke-Jeeves Pattern Search Method, Wenye Lin, Zhenjun Ma, Paul Cooper
Thermal Performance Evaluation And Optimal Design Of Buildings With Integrated Air-Based Photovoltaic Thermal Collectors And Phase Change Materials Using The Hooke-Jeeves Pattern Search Method, Wenye Lin, Zhenjun Ma, Paul Cooper
Faculty of Engineering and Information Sciences - Papers: Part A
Over the last several decades, many low energy technologies have been developed and deployed to reduce building energy consumption. Among various solutions, solar photovoltaic thermal (PVT) collectors and phase change materials (PCMs) are among the most promising methods receiving increasing attention. This paper presents a thermal performance evaluation and optimal design of buildings integrated with air-based solar PVT collectors and PCMs embedded in the building envelope by using The Hooke-Jeeves pattern search method. The Hooke-Jeeves generalized pattern search is used to search for optimal solutions of the optimization problem. The variables optimized include the PVT air flow rate, additional wall …
Optimization Of A Ceiling Ventilation System With Integrated Photovoltaic Thermal Collectors And Phase Change Materials, Zhenjun Ma, Wenye Lin, Mohammed I. Sohel
Optimization Of A Ceiling Ventilation System With Integrated Photovoltaic Thermal Collectors And Phase Change Materials, Zhenjun Ma, Wenye Lin, Mohammed I. Sohel
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents the performance evaluation and design optimization of a ceiling ventilation system with integrated solar photovoltaic thermal (PVT) collectors and phase change materials (PCMs) by using a hybrid Particle Swarm Optimization and Hooke-Jeeves Pattern search (PSO-HJ) algorithm. In this novel ceiling ventilation system, the PVT collectors are used to generate electricity and provide the low-grade heating energy for buildings by using the winter daytime solar radiation, while the PCM is integrated into the building ceiling as part of the ceiling insulation and at the same time, as a centralized thermal energy storage unit to temporally store the low-grade …
Review Of Solid-Liquid Phase Change Materials And Their Encapsulation Technologies, Weiguang Su, Jo Darkwa, Georgios Kokogiannakis
Review Of Solid-Liquid Phase Change Materials And Their Encapsulation Technologies, Weiguang Su, Jo Darkwa, Georgios Kokogiannakis
Faculty of Engineering and Information Sciences - Papers: Part A
Various types of solid-liquid phase change materials (PCMs) have been reviewed for thermal energy storage applications. The review has shown that organic solid-liquid PCMs have much more advantages and capabilities than inorganic PCMs but do possess low thermal conductivity and density as well as being flammable. Inorganic PCMs possess higher heat storage capacities and conductivities, cheaper and readily available as well as being non-flammable, but do experience supercooling and phase segregation problems during phase change process. The review has also shown that eutectic PCMs have unique advantage since their melting points can be adjusted. In addition, they have relatively high …
In Situ Powder Diffraction Studies Of Electrode Materials In Rechargeable Batteries, Neeraj Sharma, Wei Kong Pang, Zaiping Guo, Vanessa K. Peterson
In Situ Powder Diffraction Studies Of Electrode Materials In Rechargeable Batteries, Neeraj Sharma, Wei Kong Pang, Zaiping Guo, Vanessa K. Peterson
Faculty of Engineering and Information Sciences - Papers: Part A
The ability to directly track the charge carrier in a battery as it inserts/extracts from an electrode during charge/discharge provides unparalleled insight for researchers into the working mechanism of the device. This crystallographic-electrochemical information can be used to design new materials or modify electrochemical conditions to improve battery performance characteristics, such as lifetime. Critical to collecting operando data used to obtain such information insitu while a battery functions are X-ray and neutron diffractometers with sufficient spatial and temporal resolution to capture complex and subtle structural changes. The number of operando battery experiments has dramatically increased in recent years, particularly those …
Using Solar Photovoltaic Thermal Collectors In Phase Change Materials Enhanced Buildings For Thermal Performance Management, Zhenjun Ma, Wenye Lin, Mohammed I. Sohel
Using Solar Photovoltaic Thermal Collectors In Phase Change Materials Enhanced Buildings For Thermal Performance Management, Zhenjun Ma, Wenye Lin, Mohammed I. Sohel
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents the investigation of using air-based solar photovoltaic thermal (PVT) collectors in phase change materials (PCMs) enhanced buildings for effective thermal management. PVT collectors are used to generate electricity and provide low grade heating energy to buildings for winter space heating. PCMs are either integrated into building walls to increase the local thermal mass or used as a temporary centralized thermal storage to store the low grade thermal energy derived from the PVT collectors. The thermal performance of buildings due to the integration of the PVT collectors and PCMs is tested and evaluated through computer simulations. It is …
Advances In Materials And Processing Technologies Foreword, A Kiet Tieu, Hongtao Zhu
Advances In Materials And Processing Technologies Foreword, A Kiet Tieu, Hongtao Zhu
Faculty of Engineering and Information Sciences - Papers: Part A
We are pleased to present in this issue of Metallurgical and Materials Transactions B selected papers from the 15th International Conference on Advances in Materials and Processing Technologies (AMPT2012) held in Wollongong, Australia, 23 to 26 September 2012. This year, the conference program covered over 450 papers in 72 technical sessions and 100 poster presentations with a broad range of topics such as materials, deformation processing, materials removal process, processing of new and advanced materials, welding and joining, surface engineering and other related processes. The conference has been a highlight in the 2012 Calendar on Materials and Processing Technologies.
Investigations Into The Dustiness Of Bulk Materials, Peter Wypych, Leong Mar
Investigations Into The Dustiness Of Bulk Materials, Peter Wypych, Leong Mar
Faculty of Engineering and Information Sciences - Papers: Part A
The mining industry, minerals processing, transport and export infrastructure sectors are facing increasingly difficult challenges in the near future, such as sustainable development and operation (e.g. environmental emissions, social/ cultural impacts, economics). This paper describes some of the new technologies that are being researched, developed and employed to minimise dust emissions by addressing dustability and dust generation mechanisms. It also presents some results from the research being undertaken on the measurement of the dustiness of bulk materials.
A Theoretical Investigation Of A Solar Photovoltaic Thermal System Integrated With Phase Change Materials, M Imroz Sohel, Zhenjun Ma, Paul Cooper, Jamie Adams, Robert Scott
A Theoretical Investigation Of A Solar Photovoltaic Thermal System Integrated With Phase Change Materials, M Imroz Sohel, Zhenjun Ma, Paul Cooper, Jamie Adams, Robert Scott
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper we present a theoretical investigation of an air based solar photovoltaic thermal (PVT) system integrated with phase change materials. The advantage of the air based PVT system is that the air can be directly used for space heating or cooling. At first we present an air based PVT system model and analyze the effect of major parameters on the system performance. We then integrate this PVT system model with a phase change material (PCM) energy storage system model and analyze the system performance. We found that solar irradiation increased thermal efficiency initially before reaching a plateau. However, …
Microstrength, Strength And Microstructure Of Carbonaceous Materials, Xing Xing, Guangqing Zhang, George Ciezki, Mark Dell'amico, Oleg Ostrovski
Microstrength, Strength And Microstructure Of Carbonaceous Materials, Xing Xing, Guangqing Zhang, George Ciezki, Mark Dell'amico, Oleg Ostrovski
Faculty of Engineering and Information Sciences - Papers: Part A
The effect of heat treatment at 700-1500 ºC on the mechanical strength, micro strength and pore structure of carbonaceous materials, including coke, char and coals, were studied using tensile test, ultra micro indentation and image analysis. Strength of chars and pyrolysed coals was strongly enhanced by heat treatment at temperature below 1100 °C; strength of cokes was slightly degraded after heat treatment at 1500 °C. Mechanical strength of carbonaceous materials was demonstrated to be significantly affected by micro strength and porosity. Micro strength of chars and coals was significantly enhanced by heat treatment, whereas micro strength of cokes was only …
Predication Of The Behaviour Of Bulk Materials In The Design And Operation Of Bulk Handling And Processing Plants, David Hastie, Peter Wypych, Andrew Grima, Richard La Roche, David Curry
Predication Of The Behaviour Of Bulk Materials In The Design And Operation Of Bulk Handling And Processing Plants, David Hastie, Peter Wypych, Andrew Grima, Richard La Roche, David Curry
Faculty of Engineering and Information Sciences - Papers: Part A
It is very dangerous to assume or extrapolate anything when it comes to bulk material properties and behaviour. Traditional methods for flow prediction, such as hand calculation or even just relying on past experience, require assumptions to be made about the bulk material properties and flow. Although these materials may have generic names and possess similar properties (e.g. coal, iron ore), they can all behave quite differently under dynamic conditions. What we end up designing for one part of the plant may be quite different to what is needed in another part of the plant, which may be handling or …
Some Analytical Solutions For Problems Involving Highly Frictional Granular Materials, Ngamta Thamwattana
Some Analytical Solutions For Problems Involving Highly Frictional Granular Materials, Ngamta Thamwattana
Faculty of Engineering and Information Sciences - Papers: Part A
Published abstract of thesis submitted to The University of Wollongong, August 2004. Full thesis can be found at http://ro.uow.edu.au/theses/239.
The Limiting Ideal Theory For Shear-Index Cohesionless Granular Materials, Grant Cox, James Hill
The Limiting Ideal Theory For Shear-Index Cohesionless Granular Materials, Grant Cox, James Hill
Faculty of Engineering and Information Sciences - Papers: Part A
To model cohesionless granular flow using continuum theory, the usual approach is to assume the cohesionless Coulomb-Mohr yield condition. However, this yield condition assumes that the angle of internal friction is constant, when according to experimental evidence for most powders the angle of internal friction is not constant along the yield locus, but decreases for decreasing normal stress component σ from a maximum value of π/2. For this reason, we consider here the more general yield function which applies for shear-index granular materials, where the angle of internal friction varies with σ. In this case, failure due to frictional slip …
Dynamic Properties And Liquefaction Behavior Of Granular Materials Using Discrete Element Method, S V. Dinesh, T G. Sitharam, J S Vinod
Dynamic Properties And Liquefaction Behavior Of Granular Materials Using Discrete Element Method, S V. Dinesh, T G. Sitharam, J S Vinod
Faculty of Engineering and Information Sciences - Papers: Part A
Dynamic properties of the soil such as shear modulus and damping ratio are important parameters in the prediction of the dynamic response of geotechnical engineering structures. Though these properties are dependent on several factors, strain amplitude and confining pressure have a major effect. Liquefaction is another important phenomenon associated with the undrained response of granular materials in loose state. In this paper, the results of the numerical simulation of cyclic triaxial shear tests on three-dimensional assembly consisting of 1000 sphere particles using Discrete Element Method (DEM) have been reported under undrained conditions. From the results, the shear modulus and damping …