|
|
|
| Thermal Contraction Measurement of GFRP at Low Temperature |
| JIA Hong，ZHANG Peng
|
| (Institute of Refrigeration and Cryogenics, Shanghai Jiaotong University, Shanghai 200240, China) |
|
|
|
|
Abstract Abstract： An experimental system based on a twostage GM cryocooler was built to measure the thermal contraction from 15K to 293 K. The thermal contraction of the material at low temperature was measured by using the strain gauge method. The effects of variation of the resistance and gage factor (Ks) of karma foil strain gauge at low temperature on the measurement were analyzed and eliminated. The experimental thermal contraction of 304 stainless steel was first measured and compared with standard data to verify the reliability of the measurement and to obtain the correction coefficient (η′) of Ks at different temperatures. Then, the thermal contraction of Al6061T6 was measured and compared with standard data, and the maximum deviation is -4.8%, which proved that η′ was reasonable. Finally, the transversal and longitudinal thermal contraction of GFRP (glass fiber weight content of 70%) was measured at different temperatures. The experimental results show that the transversal thermal contraction of GFRP is approximately 1.12 times of the longitudinal thermal contraction in the same temperature range.
|
|
Received: 15 April 2015
Published: 28 April 2016
|
|
|
|
|
|
| [1] |
HUANG Yikun,CHEN Meishan,ZHANG Huisheng,WENG Shilie. Gas Path Diagnosis Based on Sigma Point Kalman Filter of Gas Turbine[J]. J. Shanghai Jiaotong Univ.(Sci.) , 2016, 50(04): 534-539. |
| [2] |
LIU Xuefeng,LIU Jinping,CHEN Xinglong,LUO Wenhai. Static Stability Analysis of Air-Conditioning Chilled Water System for Variable Differential Pressure Control Considering Bypass Loop Regulation Characteristics
[J]. J. Shanghai Jiaotong Univ.(Sci.) , 2014, 48(06): 772-777. |
| [3] |
QUAN Rui-a, TANG Xin-Feng-a, QUAN Shu-Hai-b, c , HUANG Liang-b. Experimental Study on Automobile Exhaust Thermoelectric Generator in Series[J]. J. Shanghai Jiaotong Univ.(Sci.) , 2012, 46(05): 677-682. |
|
|
|
|
