Measurement of Local Creep Deformation in Cross-Weld Specimen by Optical Fiber Marking and Remote Monitoring

2001 ◽  
Vol 124 (1) ◽  
pp. 54-58 ◽  
Author(s):  
Shan-Tung Tu ◽  
Jian-Ming Gong ◽  
Xiang Ling ◽  
Xiao-Yuan He
Keyword(s):  
High Temperature ◽  
Optical Fiber ◽  
Creep Deformation ◽  
Remote Monitoring ◽  
Small Region ◽  
New Technique ◽  
Deformation Localization ◽  
High Temperature Components ◽  
A New Technique

Creep deformation localization is a common occurrence generally found in high temperature components, typically at weldments and geometrical discontinuities. The deformation in a small region cannot be measured by a conventional displacement gage. A new technique for measuring long-term local creep deformation was developed. It uses quartz optical fiber marking, remote monitoring, and image processing. Long-term measurements of the creep deformations of base metal, weld metal, and heat-affected zone in cross-weld specimens were performed at high temperature, which verify the new technique. Strain distributions and evolutions in the weldments are obtained.

A new technique for long-term recording of eye movements in infants

1976 ◽  
Vol 40 (1) ◽  
pp. 109-112 ◽  
Author(s):  
Ronald M Harper ◽  
Toke Hoppenbrouwers ◽  
S.A Ross
Keyword(s):  
Eye Movements ◽  
New Technique ◽  
A New Technique

Analytical Approach to Selecting and Designing a Miniature Downhole Refrigerator

1992 ◽  
Vol 114 (4) ◽  
pp. 339-344 ◽  
Author(s):  
G. A. Bennett
Keyword(s):  
High Temperature ◽  
Failure Modes ◽  
Thermal Protection ◽  
Selection Process ◽  
Systematic Analysis ◽  
Design Changes ◽  
Protection Technology ◽  
High Temperature Components ◽  
Final Selection

The design approach and results from a series of analyses used to select a miniature high-temperature multi-watt refrigerator for thermally protecting downhole instruments are described. Thirty-one systems from nine physical or chemical processes were investigated and compared against the design criteria and constraints. Preliminary thermodynamic analyses and the results of a search for high-temperature components and refrigerants eliminated all but three processes and seven systems. These seven systems were re-evaluated based on a set of proposed design changes that reflect natural evolution from a prototype to commercial system application. Final selection considered refrigerator interactions with the geothermal logging system to define failure modes, ensure compatibility, and allow adaptability to changing conditions. The selected refrigerator design permits reliable, long-term active cooling of downhole instruments in hot wells. The consistent design, systematic analysis and unbiased selection process represent a new body of research results that provide potential for substantial advances in downhole thermal protection technology.

A New Technique for Measuring a time-varying Optical Fiber Strain

1996 ◽  
Author(s):  
Osamu Ogawa ◽  
Mitsuru Kamikatano ◽  
Takashi Matsuzawa
Keyword(s):  
Optical Fiber ◽  
New Technique ◽  
Time Varying ◽  
A New Technique

A New Technique for Characterizing Comonomer Distribution in Polyolefins: High-Temperature Thermal Gradient Interaction Chromatography (HT-TGIC)

2011 ◽  
Vol 44 (8) ◽  
pp. 3062-3072 ◽  
Author(s):  
Rongjuan Cong ◽  
Willem deGroot ◽  
Al Parrott ◽  
Wallace Yau ◽  
Lonnie Hazlitt ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Gradient ◽  
New Technique ◽  
A New Technique

Synthesis of Copper Containing Zeolites: New, Simple and Efficient Method for Quantitative Exchange

1992 ◽  
Vol 57 (4) ◽  
pp. 809-816 ◽  
Author(s):  
Michel H. Gubelmann ◽  
Michel Guisnet ◽  
Guy Perot ◽  
Yannick Pouilloux
Keyword(s):  
High Temperature ◽  
Efficient Method ◽  
Exchange Capacity ◽  
New Technique ◽  
Water Mixture ◽  
New Materials ◽  
A New Technique ◽  
Hydrolysis Of

A new technique is described which allows the quantitative exchange of copper(II) into ZSM-5 zeolites. The sequence consists of two steps: (i) impregnation of the zeolite with copper(II) in amounts higher than the exchange capacity; (ii) leaching of the copper in excess with respect to the exchange capacity with a chlorobenzene-water mixture at high temperature. The performances of the new materials in the hydrolysis of chlorobenzene, as well as preliminary informations on the nature of the catalyst and the type of mechanism are presented.

scholarly journals In situ high-pressure and high-temperature X-ray microtomographic imaging during large deformation: A new technique for studying mechanical behavior of multiphase composites

Geosphere ◽  
2011 ◽  
Vol 7 (1) ◽  
pp. 40-53 ◽  
Author(s):  
Yanbin Wang ◽  
Charles Lesher ◽  
Guillaume Fiquet ◽  
Mark L. Rivers ◽  
Norimasa Nishiyama ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Large Deformation ◽  
New Technique ◽  
X Ray ◽  
Multiphase Composites ◽  
A New Technique
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