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Articles 1 - 9 of 9
Full-Text Articles in Science and Technology Studies
Breakaway Oxidation Behaviour Of Ferritic Stainless Steels At 1150 °C In Humid Air, Xiawei Cheng, Zhengyi Jiang, Brian J. Monaghan, Dongbin Wei, Raymond Longbottom, Jingwei Zhao, Jianguo Peng, Ming Luo, Li Ma, Suzhen Luo, Laizhu Jiang
Breakaway Oxidation Behaviour Of Ferritic Stainless Steels At 1150 °C In Humid Air, Xiawei Cheng, Zhengyi Jiang, Brian J. Monaghan, Dongbin Wei, Raymond Longbottom, Jingwei Zhao, Jianguo Peng, Ming Luo, Li Ma, Suzhen Luo, Laizhu Jiang
Faculty of Engineering and Information Sciences - Papers: Part A
The breakaway oxidation behaviour of ferritic stainless steels 430, 443 and 445 has been investigatedat 1150◦C in humid air. The oxidation kinetics exhibited significant differences among the three ferriticstainless steels. A uniform and steady growing oxide scale was developed on the 430 steel with an evensteel/oxide interface. Local breakdown of the initially protective oxide scale occurred and oxide noduleswere developed on the 443 and 445 stainless steels, resulting in irregular and rough steel/oxide inter-faces. The breakaway oxidation behaviour was significantly influenced by the microstructure and thecomposition of the oxide scale. The Mn-Cr spinel oxide formed on top of the Cr2O3scale …
Experimental Investigation Of The Behaviour Of Concrete Beams Reinforced With Gfrp Bars Under Static And Impact Loading, Matthew Goldston, Alex M. Remennikov, M Neaz Sheikh
Experimental Investigation Of The Behaviour Of Concrete Beams Reinforced With Gfrp Bars Under Static And Impact Loading, Matthew Goldston, Alex M. Remennikov, M Neaz Sheikh
Faculty of Engineering and Information Sciences - Papers: Part A
Composite materials, including Fibre Reinforced Polymer (FRP) bars, have been gaining momentum as alternatives to traditional steel reinforcements in civil and structural engineering sectors. FRP materials are non-corrosive, non-conductive, and lightweight and possess high longitudinal tensile strength, which are advantageous for their use in civil infrastructure. This paper presents the results of an experimental investigation into the effects of the use of glass FRP (GFRP) bars as internal reinforcement on the behaviour of concrete beams. Both static and dynamic (impact) behaviours of the beam have been investigated. Twelve GFRP reinforced concrete (RC) beams were designed, cast and tested. Six GFRP …
The Swelling Behaviour Of Lignosulfonate-Treated Expansive Soil, Dennis Pere Alazigha, Buddhima Indraratna, J S. Vinod, Lambert Emeka Ezeajugh
The Swelling Behaviour Of Lignosulfonate-Treated Expansive Soil, Dennis Pere Alazigha, Buddhima Indraratna, J S. Vinod, Lambert Emeka Ezeajugh
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents results regarding the potential of lignosulfonate (LS) to control the swelling of expansive soil. One-dimensional swell tests were performed on untreated and LS-treated remoulded samples of Australian expansive soil from the state of Queensland. The test results indicated that LS has significant influence on the swelling behaviour of this expansive soil. The results were compared with those of identical cement-treated soil samples, and it was found that LS could be a economical and environmentally friendly alternative to traditional alkaline additives. In addition, the behaviour of LS-treated specimens during repeated freezing and thawing cycles was measured. The results …
Modeling Behaviour Of Railway Ballast In Prismoidal Apparatus Using Discrete Element Method, Gino O. Calderon Vizcarra, Sanjay Nimbalkar, Michele Dal Toe Casagrande
Modeling Behaviour Of Railway Ballast In Prismoidal Apparatus Using Discrete Element Method, Gino O. Calderon Vizcarra, Sanjay Nimbalkar, Michele Dal Toe Casagrande
Faculty of Engineering and Information Sciences - Papers: Part A
This article presents the results of numerical simulations of loading tests conducted on coarse particles that simulate railroad ballast. The objective of this study was to evaluate the deformation of ballast under vertical loading and to study the influence of the two different particle size distributions. One of them was according to particle size distribution recommended by Indraratna and co-workers in the past as an improvement to Australian Standard and the other was prepared in accordance with Brazilian standard. The discrete element method offers a new means of studying the response characteristics of railway ballast. The basic idea of discrete …
Biaxial Creep Test Study On The Influence Of Structural Anisotropy On Rheological Behaviour Of Hard Rock, Chuangzhou Wu, Qingsheng Chen, Sudip Basack, Riqing Xu, Zhenming Shi
Biaxial Creep Test Study On The Influence Of Structural Anisotropy On Rheological Behaviour Of Hard Rock, Chuangzhou Wu, Qingsheng Chen, Sudip Basack, Riqing Xu, Zhenming Shi
Faculty of Engineering and Information Sciences - Papers: Part A
Rheological characteristics are one of most important properties needed to be considered for the designing and construction for the long term stability and serviceability of underground structures in the rock mass. Up to date, although extensive studies on the rheological properties of rocks are available in the literature, most of existing studies reported the strain-time data for the axial deformation through compression rheological method and did not mention the lateral deformation, and mainly focused on the soft rocks at shallow depth. Thus, very limited attention has been paid to the rheological properties of deep and hard rock, neglecting the effects …
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.
Transient Cfd Modelling Of Low-Temperature Spontaneous Heating Behaviour In Multiple Coal Stockpiles With Wind Forced Convection, Jian Zhang, Yuntao Liang, Ting X. Ren, Zhongwei Wang, Gongda Wang
Transient Cfd Modelling Of Low-Temperature Spontaneous Heating Behaviour In Multiple Coal Stockpiles With Wind Forced Convection, Jian Zhang, Yuntao Liang, Ting X. Ren, Zhongwei Wang, Gongda Wang
Faculty of Engineering and Information Sciences - Papers: Part A
Spontaneous heating of coal stockpile has long been a thermal dynamic hazard during coal storage, processing, and transport. A transient non-equilibrium thermal CFD model has been developed to study the low-temperature self-heating behaviour of coal in multiple stockpiles under different prevailing wind conditions. Modelling results from the initial steady wind flow simulation indicate that a wake region can be induced on the leeward side of each coal stockpile. Pressure coefficient drops when the wind stream encounters or leaves a stockpile and the pressure coefficient profiles of multiple stockpiles tend to have more resemblance with a wider spacing. The first stockpile …
Stress-Dilatancy Behaviour Of Compacted Coalwash As A Landfill Option, Ana Heitor, Chazath Kaliboullah, Buddhima Indraratna, Cholachat Rujikiatkamjorn
Stress-Dilatancy Behaviour Of Compacted Coalwash As A Landfill Option, Ana Heitor, Chazath Kaliboullah, Buddhima Indraratna, Cholachat Rujikiatkamjorn
Faculty of Engineering and Information Sciences - Papers: Part A
Coalwash (CW) is granular waste by-product that results from the operation of the local coal mining industry. The reuse and recycling of this material in earthwork construction project as landfill option, is attractive from both economic and environmental perspectives. This paper presents an experimental study on compacted CW material prepared at different relative compaction levels. First the basic materials index properties are described and the stress-dilatancy behaviour is examined through a series of drained triaxial compression tests. The experimental data suggests that the different relative compaction levels exhibit different stress strain behaviour but show some degree of similarity in terms …
Assessment Of Interface Shear Behaviour Of Sub-Ballast With Geosynthetics By Large-Scale Direct Shear Test, Mohammad Mahdi Biabani, Buddhima Indraratna, Sanjay Nimbalkar
Assessment Of Interface Shear Behaviour Of Sub-Ballast With Geosynthetics By Large-Scale Direct Shear Test, Mohammad Mahdi Biabani, Buddhima Indraratna, Sanjay Nimbalkar
Faculty of Engineering and Information Sciences - Papers: Part A
A series of large-scale direct shear test were conducted to study the interface shear strength of subballast reinforced with different types of geomembranes and geogrids. The impact of normal stress (σn), shearing rate (SR), relative density (DR) and open area (OA%) on the behaviour of granular material was investigated in unreinforced and reinforced condition. The results revealed that the performance of material was markedly influenced by σn and OA. The results also showed that geogrids provided a greater value of passive resistance owing to have transverse ribs, but the mobilised passive resistance became smaller with increase in OA. The triaxial …