STUDIES IN STRAIN MEASUREMENT AT HIGH TEMPERATURE

Abstract

An effort has been made to develop indcgeneously a bonded wire resistance strain gage for applications in high temperature conditions often encountered in the important fields like aeronautical industry, atomic power plants, thermal power plants and space research. An available wire has been used as a gage material. Behaviour of the gage for satisfactory performance upto highest temperature ( 370°C ) has been investigated experimentally. During the development work, the following gage characteristics were determined t 1. Apparent strain VAS Temperature 2. Zero shift with temperature cycles 3. Gage factor variation with temperature 4. Drift behaviour. From the results obtained, it is seen that the gage can be used for long term static strain measurements upto 300°C and short term static strain measurements upto 370°C. NOTE : Development work is done by the author under the guidance of Dr. G.C. Nayak, Professor in Civil Engineering and Mr. Krishen Kumar, Reader in Civil Engineering. No other person or firm is entitled to have any claims on the design, research and development work done.