Rotational Degrees Of Freedom In Modelling Of Materials With Intrinsic Length Scale. In many applications, from nanotechnology to construction and mining, the modelled objects are not large enough as compared to the material constituents for classical continuum modelling to be adequate, but yet encompass too many elements for comfortable particle-type computer simulation. Generalised continua would offer a viable option if a rational method of their construction for each intrinsic material struc ....Rotational Degrees Of Freedom In Modelling Of Materials With Intrinsic Length Scale. In many applications, from nanotechnology to construction and mining, the modelled objects are not large enough as compared to the material constituents for classical continuum modelling to be adequate, but yet encompass too many elements for comfortable particle-type computer simulation. Generalised continua would offer a viable option if a rational method of their construction for each intrinsic material structure were at hand. The project aims at developing the necessary homogenisation procedure and constructing generalised (Cosserat) continuum models of deformation, wave propagation and impact fracture in particulate and layered materials such as multi-wall nanotubes, fullerenes, particulate composites and layered rock masses.Read moreRead less
Investigating mineral alteration and infilling of discontinuities in naturally deformed rocks as a guide to rock mass rheology. Structural analysis of naturally deformed rock will be used to investigate the origin, physical characteristics and frictional behaviour of naturally formed discontinuity surfaces. Discontinuities in naturally deformed rock masses are typically altered and infilled with complex combinations of mineral matter and are a major control on the rheology, including strength a ....Investigating mineral alteration and infilling of discontinuities in naturally deformed rocks as a guide to rock mass rheology. Structural analysis of naturally deformed rock will be used to investigate the origin, physical characteristics and frictional behaviour of naturally formed discontinuity surfaces. Discontinuities in naturally deformed rock masses are typically altered and infilled with complex combinations of mineral matter and are a major control on the rheology, including strength and stability, of rock masses in engineering excavations. By combining structural geology techniques and laboratory experiments, and with reference to existing data on field-scale rock mass deformation derived from engineering rock mechanics investigations, a methodology for predicting rock mass rheology from fundamental geological observations will be devised and tested.Read moreRead less
Determination of unsaturated soil properties using cone penetrometer data. Unsaturated soils account for almost 40 percent of earth's land surface. Over 70 percent of Australia's land surface consists of unsaturated soils. The research proposed aims at providing a methodology for a realistic characterisation of unsaturated soils in the field. The developments in this research will be immediately applicable to many engineering problems of national interest including dams, embankments, foundatio ....Determination of unsaturated soil properties using cone penetrometer data. Unsaturated soils account for almost 40 percent of earth's land surface. Over 70 percent of Australia's land surface consists of unsaturated soils. The research proposed aims at providing a methodology for a realistic characterisation of unsaturated soils in the field. The developments in this research will be immediately applicable to many engineering problems of national interest including dams, embankments, foundations, highways and airfields. The work will also benefit Australia and the Australian research community through the development of a new expertise within Australia, which is likely to receive wide spread attention in both scientific and engineering communities.
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Hydro-mechanical interactions in coal geo-sequestration of carbon dioxide. One of the most critical environmental issues facing society is that of global warming because of increasing concentrations of carbon dioxide released from burning of fossil fuels. Storage of CO2 in the ground, geo-sequestration, offers the promise of significant reductions in atmospheric CO2 release, particularly from coal fired power stations which produce 40% of Australia's CO2 emissions. The proposed project will lead ....Hydro-mechanical interactions in coal geo-sequestration of carbon dioxide. One of the most critical environmental issues facing society is that of global warming because of increasing concentrations of carbon dioxide released from burning of fossil fuels. Storage of CO2 in the ground, geo-sequestration, offers the promise of significant reductions in atmospheric CO2 release, particularly from coal fired power stations which produce 40% of Australia's CO2 emissions. The proposed project will lead to greater understanding and reduced risks during the injection and storage of CO2 in deep unmineable coal deposits. This will contribute to national efforts to reduce global warming, safeguard the Australian coal industry, and allow continued electricity generation from coal-fired plants. Read moreRead less
A fully coupled elasto-plastic model for dynamic analysis of unsaturated soils. This research is concerned with an important and, as yet, unresearched class of problems in geomechanics dealing with dynamic analysis of unsaturated soils. The work is of significance as it will contribute to the progress of soil mechanics as a science, advancing it from the study of unsaturated soils to that of real soils, which are invariably unsaturated. The project should lead to cost savings in many geotechnica ....A fully coupled elasto-plastic model for dynamic analysis of unsaturated soils. This research is concerned with an important and, as yet, unresearched class of problems in geomechanics dealing with dynamic analysis of unsaturated soils. The work is of significance as it will contribute to the progress of soil mechanics as a science, advancing it from the study of unsaturated soils to that of real soils, which are invariably unsaturated. The project should lead to cost savings in many geotechnical engineering practices as it will provide a better understanding of the response of unsaturated soils to dynamic loading and provide a greater confidence in the prediction of the preformance of earth-structures.Read moreRead less
Experimental Investigation and Constitutive Modelling of Thermo-Hydro-Mechanical Coupling Effects in Unsaturated Porous Media. The research proposed in this project will benefit the Australian community through provision of a methodology for a more realistic and fully coupled modelling of flow and deformation in unsaturated porous media subject to thermal loading. The developments proposed in this research will be immediately applicable to many engineering problems of national interest, includin ....Experimental Investigation and Constitutive Modelling of Thermo-Hydro-Mechanical Coupling Effects in Unsaturated Porous Media. The research proposed in this project will benefit the Australian community through provision of a methodology for a more realistic and fully coupled modelling of flow and deformation in unsaturated porous media subject to thermal loading. The developments proposed in this research will be immediately applicable to many engineering problems of national interest, including storage of nuclear wastes, removal of contaminants using air sparging, steam drive/steam flooding, and in situ combustion. The work will also benefit Australia and the Australian research community through the development of a new expertise within Australia, which will have a high potential for export to other countries.
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CO2 sequestration in deformable, chemically interactive, double porosity media. Increasing atmospheric carbon dioxide (CO2) level is emerging as one of the most serious issues affecting humanity. Models, theories and relationships derived from this research will have a direct and immediate impact on the design, construction, maintenance, management and risk assessment of sequestration systems in Australia and overseas, and will assist Australia and Australian community to meet its target reducti ....CO2 sequestration in deformable, chemically interactive, double porosity media. Increasing atmospheric carbon dioxide (CO2) level is emerging as one of the most serious issues affecting humanity. Models, theories and relationships derived from this research will have a direct and immediate impact on the design, construction, maintenance, management and risk assessment of sequestration systems in Australia and overseas, and will assist Australia and Australian community to meet its target reductions in CO2 emission. The work will also benefit Australia and the Australian research community through the development of a new expertise in Australia, which will have a significant potential for export to other countries.Read moreRead less
Stochastic modelling of fractures in crystalline rock masses for hot dry rock enhanced geothermal systems. Hot dry rock geothermal energy will contribute significant base-load power to the nation without producing greenhouse gas emissions. This research will contribute to the optimal design of fracture generation programmes to create effective artificial reservoirs in geothermal systems, which is crucial to successful geothermal energy production.
Large-scale and long-term storage of Hydrogen in underground reservoirs. This project aims to test effective strategies to re-use Australia’s depleted gas fields for large-scale, long-term, renewable energy storage. With Australia’s energy system undergoing a radical hydrogen-based energy transformation, a critical challenge in the years ahead will be to effectively store massive volumes of hydrogen for long periods (months and years). The overall expected outcome of this research is to fully un ....Large-scale and long-term storage of Hydrogen in underground reservoirs. This project aims to test effective strategies to re-use Australia’s depleted gas fields for large-scale, long-term, renewable energy storage. With Australia’s energy system undergoing a radical hydrogen-based energy transformation, a critical challenge in the years ahead will be to effectively store massive volumes of hydrogen for long periods (months and years). The overall expected outcome of this research is to fully understand the performance and the geological and environmental implications of long-term storage of hydrogen in empty gas fields. Benefit: this foundational scientific knowledge is crucial if Australia is to effectively bring about this new, sustainable, affordable, long-term, hydrogen-storage solution. Read moreRead less
Economical Offshore Foundation for Deep Water - Suction Embedded Plate Anchor. The oil/gas industry's venture in finding large resources in deep water has lead to a number of important economic and technical challenges including, among others, new types of foundations. Suction Embedded Plate Anchor (SEPA) has shown its potential of cost-saving against other types of foundations in deep waters. The aim of this project is to use the experties of investigators, on numerical and centrifuge modelling ....Economical Offshore Foundation for Deep Water - Suction Embedded Plate Anchor. The oil/gas industry's venture in finding large resources in deep water has lead to a number of important economic and technical challenges including, among others, new types of foundations. Suction Embedded Plate Anchor (SEPA) has shown its potential of cost-saving against other types of foundations in deep waters. The aim of this project is to use the experties of investigators, on numerical and centrifuge modelling, to study the behaviour of SEPA in sub-marine deposit. Successful completing of the project will contribute to the very little existing data on this new type of foundation - SEPA.Read moreRead less