TY - GEN
T1 - A long-term local deformation measurement system for notched specimen at high temperature
AU - Yangyan, Zheng
AU - Xiang, Ling
AU - Jianjun, Chen
PY - 2008
Y1 - 2008
N2 - This paper describes the design and evaluation of a novel optical instrumentation system that has been developed for measuring high temperature creep deformation under long-term loads. The system includes short optical fibers, a super long working distance microscope, a CCD camera, and digital image processing software. Short optical fibers are pasted on the small region on one side of the specimen surface as markings. The two optical fibers are illuminated by a light and are focused onto the CCD camera by the super long working distance microscope. The images tracked at intervals are processed by digital image processing software. The distance between the fibers at each picture can be measured. The local creep deformations versus time are obtained by measuring the variation of relative distance between the fibers. Experiments on Cr5Mo notched specimens were carried out. The results demonstrate that the system is capable of measuring creep deformation at elevated temperature.
AB - This paper describes the design and evaluation of a novel optical instrumentation system that has been developed for measuring high temperature creep deformation under long-term loads. The system includes short optical fibers, a super long working distance microscope, a CCD camera, and digital image processing software. Short optical fibers are pasted on the small region on one side of the specimen surface as markings. The two optical fibers are illuminated by a light and are focused onto the CCD camera by the super long working distance microscope. The images tracked at intervals are processed by digital image processing software. The distance between the fibers at each picture can be measured. The local creep deformations versus time are obtained by measuring the variation of relative distance between the fibers. Experiments on Cr5Mo notched specimens were carried out. The results demonstrate that the system is capable of measuring creep deformation at elevated temperature.
UR - http://www.scopus.com/inward/record.url?scp=43449139412&partnerID=8YFLogxK
U2 - 10.1115/CREEP2007-26716
DO - 10.1115/CREEP2007-26716
M3 - 会议稿件
AN - SCOPUS:43449139412
SN - 0791842878
SN - 9780791842874
T3 - 2007 Proceedings of the ASME Pressure Vessels and Piping Conference - 8th International Conference on Creep and Fatigue at Elevated Temperatures - CREEP8
SP - 601
EP - 605
BT - 2007 Proceedings of the ASME Pressure Vessels and Piping Conference - 8th International Conference on Creep and Fatigue at Elevated Temperatures - CREEP8
T2 - 2007 ASME Pressure Vessels and Piping Conference - 8th International Conference on Creep and Fatigue at Elevated Temperatures, PVP-2007/CREEP8
Y2 - 22 July 2007 through 26 July 2007
ER -