The Experts below are selected from a list of 231 Experts worldwide ranked by ideXlab platform

Anthony R. Kovscek - One of the best experts on this subject based on the ideXlab platform.

  • An experimental platform for triaxial High-pressure/High-Temperature Testing of rocks using computed tomography
    Review of Scientific Instruments, 2018
    Co-Authors: Guenther Glatz, Alexandre Lapene, Louis M. Castanier, Anthony R. Kovscek
    Abstract:

    A conventional High-pressure/High-Temperature experimental apparatus for combined geomechanical and flow-through Testing of rocks is not X-ray compatible. Additionally, current X-ray transparent systems for computed tomography (CT) of cm-sized samples are limited to design Temperatures below 180 °C. We describe a novel, High-Temperature (>400 °C), High-pressure (>2000 psi/>13.8 MPa confining, >10 000 psi/>68.9 MPa vertical load) triaxial core holder suitable for X-ray CT scanning. The new triaxial system permits time-lapse imaging to capture the role of effective stress on fluid distribution and porous medium mechanics. System capabilities are demonstrated using ultimate compressive strength (UCS) tests of Castlegate sandstone. In this case, flooding the porous medium with a radio-opaque gas such as krypton before and after the UCS test improves the discrimination of rock features such as fractures. The results of High-Temperature tests are also presented. A Uintah Basin sample of immature oil shale is heated from room Temperature to 459 °C under uniaxial compression. The sample contains kerogen that pyrolyzes as Temperature rises, releasing hydrocarbons. Imaging reveals the formation of stress bands as well as the evolution and connectivity of the fracture network within the sample as a function of time.A conventional High-pressure/High-Temperature experimental apparatus for combined geomechanical and flow-through Testing of rocks is not X-ray compatible. Additionally, current X-ray transparent systems for computed tomography (CT) of cm-sized samples are limited to design Temperatures below 180 °C. We describe a novel, High-Temperature (>400 °C), High-pressure (>2000 psi/>13.8 MPa confining, >10 000 psi/>68.9 MPa vertical load) triaxial core holder suitable for X-ray CT scanning. The new triaxial system permits time-lapse imaging to capture the role of effective stress on fluid distribution and porous medium mechanics. System capabilities are demonstrated using ultimate compressive strength (UCS) tests of Castlegate sandstone. In this case, flooding the porous medium with a radio-opaque gas such as krypton before and after the UCS test improves the discrimination of rock features such as fractures. The results of High-Temperature tests are also presented. A Uintah Basin sample of immature oil shale is he...

  • an experimental platform for triaxial High pressure High Temperature Testing of rocks using computed tomography
    Review of Scientific Instruments, 2018
    Co-Authors: Guenther Glatz, Alexandre Lapene, Louis M. Castanier, Anthony R. Kovscek
    Abstract:

    A conventional High-pressure/High-Temperature experimental apparatus for combined geomechanical and flow-through Testing of rocks is not X-ray compatible. Additionally, current X-ray transparent systems for computed tomography (CT) of cm-sized samples are limited to design Temperatures below 180 °C. We describe a novel, High-Temperature (>400 °C), High-pressure (>2000 psi/>13.8 MPa confining, >10 000 psi/>68.9 MPa vertical load) triaxial core holder suitable for X-ray CT scanning. The new triaxial system permits time-lapse imaging to capture the role of effective stress on fluid distribution and porous medium mechanics. System capabilities are demonstrated using ultimate compressive strength (UCS) tests of Castlegate sandstone. In this case, flooding the porous medium with a radio-opaque gas such as krypton before and after the UCS test improves the discrimination of rock features such as fractures. The results of High-Temperature tests are also presented. A Uintah Basin sample of immature oil shale is heated from room Temperature to 459 °C under uniaxial compression. The sample contains kerogen that pyrolyzes as Temperature rises, releasing hydrocarbons. Imaging reveals the formation of stress bands as well as the evolution and connectivity of the fracture network within the sample as a function of time.A conventional High-pressure/High-Temperature experimental apparatus for combined geomechanical and flow-through Testing of rocks is not X-ray compatible. Additionally, current X-ray transparent systems for computed tomography (CT) of cm-sized samples are limited to design Temperatures below 180 °C. We describe a novel, High-Temperature (>400 °C), High-pressure (>2000 psi/>13.8 MPa confining, >10 000 psi/>68.9 MPa vertical load) triaxial core holder suitable for X-ray CT scanning. The new triaxial system permits time-lapse imaging to capture the role of effective stress on fluid distribution and porous medium mechanics. System capabilities are demonstrated using ultimate compressive strength (UCS) tests of Castlegate sandstone. In this case, flooding the porous medium with a radio-opaque gas such as krypton before and after the UCS test improves the discrimination of rock features such as fractures. The results of High-Temperature tests are also presented. A Uintah Basin sample of immature oil shale is he...

Andrei Kotousov - One of the best experts on this subject based on the ideXlab platform.

  • Induction heating apparatus for High Temperature Testing of thermo-mechanical properties
    Applied Thermal Engineering, 2009
    Co-Authors: John Codrington, Phuc Nguyen, Andrei Kotousov
    Abstract:

    Abstract A low cost High Temperature test facility designed and built for the purpose of thermo-mechanical Testing is described. An induction heater provides variable heating rates, simple operation and easy access for Temperature and strain measurement. Specially designed High Temperature specimen grips with water-cooling allow for Testing over long periods of time. Contact Temperature and strain measurements are utilised to provide accurate and reliable results. Detail is given on the experimental procedure including calibration of the thermocouple Temperature measurement. A validation study of the thermal expansion and tensile Young’s Modulus of carbon steel 1020 at Temperatures up to 850 °C proves the accuracy of the test set-up and procedure. Results are given for the stress–strain curves of aluminium alloy 7000 T4 at various Temperatures to further demonstrate the capabilities of the test facility. The measured thermo-mechanical properties of these materials were used to develop High Temperature constitutive models for implementation in finite element thermal–structural analysis of hypersonic structures.

  • Induction heating apparatus for High Temperature Testing of thermo-mechanical properties
    Applied Thermal Engineering, 2009
    Co-Authors: John Codrington, Phuc Nguyen, Andrei Kotousov
    Abstract:

    A low cost High Temperature test facility designed and built for the purpose of thermo-mechanical Testing is described. An induction heater provides variable heating rates, simple operation and easy access for Temperature and strain measurement. Specially designed High Temperature specimen grips with water-cooling allow for Testing over long periods of time. Contact Temperature and strain measurements are utilised to provide accurate and reliable results. Detail is given on the experimental procedure including calibration of the thermocouple Temperature measurement. A validation study of the thermal expansion and tensile Young’s Modulus of carbon steel 1020 at Temperatures up to 850 °C proves the accuracy of the test set-up and procedure. Results are given for the stress–strain curves of aluminium alloy 7000 T4 at various Temperatures to further demonstrate the capabilities of the test facility. The measured thermo-mechanical properties of these materials were used to develop High Temperature constitutive models for implementation in finite element thermal–structural analysis of hypersonic structuresJ. Codrington, P. Nguyena, S.Y. Hoa and A. Kotousovhttp://www.sciencedirect.com/science/journal/1359431

Peter Brown - One of the best experts on this subject based on the ideXlab platform.

  • heat flux mapping of oxyacetylene flames and their use to characterise cf hfb2 composites
    Advances in Applied Ceramics, 2016
    Co-Authors: Anish Paul, A. C.j. Heaton, Bala Vaidhyanathan, Jon G P Binner, Peter Brown
    Abstract:

    Cost effective and fast ultra-High-Temperature Testing methods such as oxyacetylene torch Testing are extremely useful for the rapid screening of ultra-High-Temperature ceramic (UHTC) materials for hypersonic applications. There is no report in the literature, however, of an organised study to measure the heat flux and how it varies with gas flow rate, gas flow ratio and distance from the nozzle tip for an oxyacetylene flame. In this paper, the authors report for the first time the heat flux mapping of an oxidising, neutral and reducing flame. The measured heat flux was as High as ∼17 MW m−2 at a distance of 10 mm from the nozzle, which is much Higher than that previously reported in the literature. Torch Testing was carried out for Cf-HfB2 UHTC composites at this heat flux and the results are presented along with detailed microstructural characterisation.

  • oxyacetylene torch Testing and microstructural characterization of tantalum carbide
    Journal of Microscopy, 2013
    Co-Authors: Anish Paul, Bala Vaidhyanathan, Andrew Heaton, Jon G P Binner, Peter Brown
    Abstract:

    Summary Tantalum carbide samples have been subjected to High-Temperature Testing at ∼2300°C using an oxyacetylene torch to evaluate their potential for ultra-High Temperature applications. While large samples cracked during the rapid heating, indicating their inability to withstand thermal shock, small samples survived the severe test conditions. The oxidation products formed were characterized and found to comprise different phases of Ta2O5. The ultra-High Temperature experienced by the samples resulted in the formation of many interesting microstructures, including the formation of submicron sized grains, which has not been reported previously in the literature, as well as the expected evidence of melting.

Guenther Glatz - One of the best experts on this subject based on the ideXlab platform.

  • An experimental platform for triaxial High-pressure/High-Temperature Testing of rocks using computed tomography
    Review of Scientific Instruments, 2018
    Co-Authors: Guenther Glatz, Alexandre Lapene, Louis M. Castanier, Anthony R. Kovscek
    Abstract:

    A conventional High-pressure/High-Temperature experimental apparatus for combined geomechanical and flow-through Testing of rocks is not X-ray compatible. Additionally, current X-ray transparent systems for computed tomography (CT) of cm-sized samples are limited to design Temperatures below 180 °C. We describe a novel, High-Temperature (>400 °C), High-pressure (>2000 psi/>13.8 MPa confining, >10 000 psi/>68.9 MPa vertical load) triaxial core holder suitable for X-ray CT scanning. The new triaxial system permits time-lapse imaging to capture the role of effective stress on fluid distribution and porous medium mechanics. System capabilities are demonstrated using ultimate compressive strength (UCS) tests of Castlegate sandstone. In this case, flooding the porous medium with a radio-opaque gas such as krypton before and after the UCS test improves the discrimination of rock features such as fractures. The results of High-Temperature tests are also presented. A Uintah Basin sample of immature oil shale is heated from room Temperature to 459 °C under uniaxial compression. The sample contains kerogen that pyrolyzes as Temperature rises, releasing hydrocarbons. Imaging reveals the formation of stress bands as well as the evolution and connectivity of the fracture network within the sample as a function of time.A conventional High-pressure/High-Temperature experimental apparatus for combined geomechanical and flow-through Testing of rocks is not X-ray compatible. Additionally, current X-ray transparent systems for computed tomography (CT) of cm-sized samples are limited to design Temperatures below 180 °C. We describe a novel, High-Temperature (>400 °C), High-pressure (>2000 psi/>13.8 MPa confining, >10 000 psi/>68.9 MPa vertical load) triaxial core holder suitable for X-ray CT scanning. The new triaxial system permits time-lapse imaging to capture the role of effective stress on fluid distribution and porous medium mechanics. System capabilities are demonstrated using ultimate compressive strength (UCS) tests of Castlegate sandstone. In this case, flooding the porous medium with a radio-opaque gas such as krypton before and after the UCS test improves the discrimination of rock features such as fractures. The results of High-Temperature tests are also presented. A Uintah Basin sample of immature oil shale is he...

  • an experimental platform for triaxial High pressure High Temperature Testing of rocks using computed tomography
    Review of Scientific Instruments, 2018
    Co-Authors: Guenther Glatz, Alexandre Lapene, Louis M. Castanier, Anthony R. Kovscek
    Abstract:

    A conventional High-pressure/High-Temperature experimental apparatus for combined geomechanical and flow-through Testing of rocks is not X-ray compatible. Additionally, current X-ray transparent systems for computed tomography (CT) of cm-sized samples are limited to design Temperatures below 180 °C. We describe a novel, High-Temperature (>400 °C), High-pressure (>2000 psi/>13.8 MPa confining, >10 000 psi/>68.9 MPa vertical load) triaxial core holder suitable for X-ray CT scanning. The new triaxial system permits time-lapse imaging to capture the role of effective stress on fluid distribution and porous medium mechanics. System capabilities are demonstrated using ultimate compressive strength (UCS) tests of Castlegate sandstone. In this case, flooding the porous medium with a radio-opaque gas such as krypton before and after the UCS test improves the discrimination of rock features such as fractures. The results of High-Temperature tests are also presented. A Uintah Basin sample of immature oil shale is heated from room Temperature to 459 °C under uniaxial compression. The sample contains kerogen that pyrolyzes as Temperature rises, releasing hydrocarbons. Imaging reveals the formation of stress bands as well as the evolution and connectivity of the fracture network within the sample as a function of time.A conventional High-pressure/High-Temperature experimental apparatus for combined geomechanical and flow-through Testing of rocks is not X-ray compatible. Additionally, current X-ray transparent systems for computed tomography (CT) of cm-sized samples are limited to design Temperatures below 180 °C. We describe a novel, High-Temperature (>400 °C), High-pressure (>2000 psi/>13.8 MPa confining, >10 000 psi/>68.9 MPa vertical load) triaxial core holder suitable for X-ray CT scanning. The new triaxial system permits time-lapse imaging to capture the role of effective stress on fluid distribution and porous medium mechanics. System capabilities are demonstrated using ultimate compressive strength (UCS) tests of Castlegate sandstone. In this case, flooding the porous medium with a radio-opaque gas such as krypton before and after the UCS test improves the discrimination of rock features such as fractures. The results of High-Temperature tests are also presented. A Uintah Basin sample of immature oil shale is he...

John Codrington - One of the best experts on this subject based on the ideXlab platform.

  • Induction heating apparatus for High Temperature Testing of thermo-mechanical properties
    Applied Thermal Engineering, 2009
    Co-Authors: John Codrington, Phuc Nguyen, Andrei Kotousov
    Abstract:

    Abstract A low cost High Temperature test facility designed and built for the purpose of thermo-mechanical Testing is described. An induction heater provides variable heating rates, simple operation and easy access for Temperature and strain measurement. Specially designed High Temperature specimen grips with water-cooling allow for Testing over long periods of time. Contact Temperature and strain measurements are utilised to provide accurate and reliable results. Detail is given on the experimental procedure including calibration of the thermocouple Temperature measurement. A validation study of the thermal expansion and tensile Young’s Modulus of carbon steel 1020 at Temperatures up to 850 °C proves the accuracy of the test set-up and procedure. Results are given for the stress–strain curves of aluminium alloy 7000 T4 at various Temperatures to further demonstrate the capabilities of the test facility. The measured thermo-mechanical properties of these materials were used to develop High Temperature constitutive models for implementation in finite element thermal–structural analysis of hypersonic structures.

  • Induction heating apparatus for High Temperature Testing of thermo-mechanical properties
    Applied Thermal Engineering, 2009
    Co-Authors: John Codrington, Phuc Nguyen, Andrei Kotousov
    Abstract:

    A low cost High Temperature test facility designed and built for the purpose of thermo-mechanical Testing is described. An induction heater provides variable heating rates, simple operation and easy access for Temperature and strain measurement. Specially designed High Temperature specimen grips with water-cooling allow for Testing over long periods of time. Contact Temperature and strain measurements are utilised to provide accurate and reliable results. Detail is given on the experimental procedure including calibration of the thermocouple Temperature measurement. A validation study of the thermal expansion and tensile Young’s Modulus of carbon steel 1020 at Temperatures up to 850 °C proves the accuracy of the test set-up and procedure. Results are given for the stress–strain curves of aluminium alloy 7000 T4 at various Temperatures to further demonstrate the capabilities of the test facility. The measured thermo-mechanical properties of these materials were used to develop High Temperature constitutive models for implementation in finite element thermal–structural analysis of hypersonic structuresJ. Codrington, P. Nguyena, S.Y. Hoa and A. Kotousovhttp://www.sciencedirect.com/science/journal/1359431