Abstract
An experimental apparatus was established for measurements of thermal contact conductance of glass fiber reinforced plastic (GFRP) to GFRP interface. The influence of several primary factors on thermal contact conductance was investigated. Thermal contact conductance across GFRP to GFRP joint increases with increasing contact pressure, while decreases with increasing surface roughness. Higher interfacial temperature causes higher thermal contact conductance due to temperature dependency of hardness of test materials. The values of thermal contact conductance across stainless steel/GFRP joint are 1.7 times of the ones for GFRP/GFRP junction under the same experimental conditions. A comparison of experimental data with Mikic and CMY models shows that existing models overestimate experimental values.
Abbreviations
- \( h \) :
-
Thermal contact conductance across joint (W m−2 K−1)
- \( q \) :
-
Heat flux across joint (W m−2)
- \( \Delta T \) :
-
Temperature difference between contact surfaces (K)
- \( T_{1} \) :
-
Temperatures of upper contact surface (K)
- \( T_{2} \) :
-
Temperatures of lower contact surface (K)
- \( k \) :
-
Harmonic mean thermal conductivity (W m−1 K−1)
- \( P \) :
-
Contact pressure (Pa)
- \( H \) :
-
Material hardness (Pa)
- \( l \) :
-
Length (m)
- \( I \) :
-
Heating current (A)
- \( V \) :
-
Voltage (V)
- \( \Delta \) :
-
Difference
- \( \tan \theta \) :
-
Surface asperity slope
- \( \sigma \) :
-
Surface roughness (μm)
- 1:
-
Upper contact surface
- 2:
-
Lower contact surface
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Ding, C., Wang, R. Experimental investigation of thermal contact conductance across GFRP–GFRP joint. Heat Mass Transfer 51, 433–439 (2015). https://doi.org/10.1007/s00231-014-1425-y
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DOI: https://doi.org/10.1007/s00231-014-1425-y