Characterisation and Mitigation of Caustic Cracking: A Safety and Maintenance Concern in Alumina and Pulp-and-Paper Processing. Extraction of alumina from mineral bauxite (Bayer process) and pulp-and-paper processing (Kraft process) are major industries in Australia. Cracking of reaction vessels, digesters, cleaning tanks and pipework are major concern for plant integrity, occupational health, safety and environment. Caustic cracking is often the first suspect when a failure occurs. The propose ....Characterisation and Mitigation of Caustic Cracking: A Safety and Maintenance Concern in Alumina and Pulp-and-Paper Processing. Extraction of alumina from mineral bauxite (Bayer process) and pulp-and-paper processing (Kraft process) are major industries in Australia. Cracking of reaction vessels, digesters, cleaning tanks and pipework are major concern for plant integrity, occupational health, safety and environment. Caustic cracking is often the first suspect when a failure occurs. The proposed program will investigate the role of critical impurities and additives, temperature and stress fluctuations in caustic cracking of mild steel and their weldments (known to be most susceptible). This project will also develop an intellectual and infrastructural base that will also be a vital resource for several Australian industries where such cracking is a major concern.Read moreRead less
Laser-based dynamic measurements, model identification and error compensation for multi-arm robotic pre-fabrication of structural components. The aim is to establish methodologies for laser-based dynamic measurements, accurate model identification and error correction in multi-arm cooperative robotic manipulation systems. The expected outcomes include development of enabling technologies and the world's first automated fabrication system for structural timber components. The novel methodologi ....Laser-based dynamic measurements, model identification and error compensation for multi-arm robotic pre-fabrication of structural components. The aim is to establish methodologies for laser-based dynamic measurements, accurate model identification and error correction in multi-arm cooperative robotic manipulation systems. The expected outcomes include development of enabling technologies and the world's first automated fabrication system for structural timber components. The novel methodologies established will increase safety, and improve and automate the fabrication of wall frames, roof trusses, and floor and ceiling panels for housing, industrial and commercial projects within Australia and overseas. Other application areas include multi-arm manufacturing and handling of large components, materials handling in hazardous environments, and robotic servicing tasks in remote places.Read moreRead less
DETERMINATION OF SUSCEPTIBILITY TO ENVIRONMENTALLY-ASSISTED CRACKING OF SMALL AND MICROSTRUCTURALLY VARIED REGIONS WHILE MAINTAINING FRACTURE MECHANICS VALIDITY. The proposed work seeks to develop an improved tool for more accurate design data and improved materials selection criteria for critical equipment and infrastructure maintenance in major Australian industries, where environmentally-assisted cracking is a serious concern (viz., marine, polymer/chemical processing, aeronautical, alumina m ....DETERMINATION OF SUSCEPTIBILITY TO ENVIRONMENTALLY-ASSISTED CRACKING OF SMALL AND MICROSTRUCTURALLY VARIED REGIONS WHILE MAINTAINING FRACTURE MECHANICS VALIDITY. The proposed work seeks to develop an improved tool for more accurate design data and improved materials selection criteria for critical equipment and infrastructure maintenance in major Australian industries, where environmentally-assisted cracking is a serious concern (viz., marine, polymer/chemical processing, aeronautical, alumina mineral processing and pulp-and-paper). A successful validation of the novel testing approach (namely, Spiral Notch Torsion Test (SNTT)) for evaluating the stress corrosion cracking (SCC) susceptibility of materials of practical interest that are difficult or impossible to adequately characterize by conventional tests, is as much a fundamental research challenge as its accomplishment will be industrially attractive.Read moreRead less
Distributed Real-time Multiobjective Scheduling for Joinery Manufacturing Processes using Discrete Event Simulation. Australia's furniture manufacturing industry is a major contributor to the economic wealth of the Australian economy with an annual $9.5 billion turnover. The Australian Furnishing Industry Association (AFIA) estimates that there are 15,000 furniture design and manufacturing firms, employing 66,000 people. However, Australian manufacturers are experiencing high levels of fixed cos ....Distributed Real-time Multiobjective Scheduling for Joinery Manufacturing Processes using Discrete Event Simulation. Australia's furniture manufacturing industry is a major contributor to the economic wealth of the Australian economy with an annual $9.5 billion turnover. The Australian Furnishing Industry Association (AFIA) estimates that there are 15,000 furniture design and manufacturing firms, employing 66,000 people. However, Australian manufacturers are experiencing high levels of fixed cost (associated with plant and equipment) and low equipment-utilisation ratio and long delivery time. This research aims to enable Australian manufacturers to stay competitive in the dynamic global market, by providing a better strategy to allocate their constrained resources including workforces and facilities.Read moreRead less
Improvement in Stress Corrosion Cracking Resistance of Stainless Steels in Environments Conducive to Localized Pitting Damage. Stress corrosion cracking (SCC) represents a serious threat to infrastructure exposed to chloride and caustic environments. The proposed project will characterize the chloride-SCC crack propagation parameters for a super duplex stainless steel, which is the material of construction for vessels for stripping vinyl chloride monomer in a PVC processing plant. Alarmingly hig ....Improvement in Stress Corrosion Cracking Resistance of Stainless Steels in Environments Conducive to Localized Pitting Damage. Stress corrosion cracking (SCC) represents a serious threat to infrastructure exposed to chloride and caustic environments. The proposed project will characterize the chloride-SCC crack propagation parameters for a super duplex stainless steel, which is the material of construction for vessels for stripping vinyl chloride monomer in a PVC processing plant. Alarmingly high numbers the welds (nearly 50%) in the vessel had suffered extensive pitting (which is a well-known SCC initiator) and SCC cracking. For the mitigation measures, the project will also investigate pitting and SCC susceptibility of weldments of alternative varieties of stainless steels, such as Zeron 100.Read moreRead less