Thermal Conductivity Carbon Fiber Laminate

Infrared image analysis was used to determine the emissivity of the composite.

Thermal conductivity carbon fiber laminate.

Starting with thermal conductivity components for the individual continuous unidirectional fiber reinforced lamina or ply a method has been developed to determine global conductivities in a laminated carbon carbon composite. The thermal conductivity of a sample with laminate plys in the configuration 45 90 0 3 90 45 has also been measured. However the thermal conductivities of these cfrp materials are generally poor due to low axial thermal conductivity of pan based carbon fiber which greatly limits their application in the satellite structure panels. T700 and m55j are the most common carbon fiber types.

Incorporating multi walled carbon nanotubes into cfrp composites is more advantageous for improving electrical conductivity whereas incorporating gnps is more beneficial for enhancing thermal conductivity. On the one hand these carbonaceous fillers possess high thermal conductivity which act as functional component to enhance the thermal conductivity of composite laminate. Emissivity and thermal conductivity of carbon fiber epoxy laminates were characterized beforehand. Furthermore cfrp composites containing 20 wt graphene nanoplatelets gnps were found to exhibit an excellent thermal conductivity of 13 7 w m k.

Assuming that all laminae are identical in thickness and in fiber content effective thermal conductivity in each global direction is determined for the laminated composite. At room temperature the thermal conductivity in the 0 direction is 7 times that in the 90 direction. A bi experiment inverse method combining fe modeling and steady state temperature measurements on a heated test piece was used to characterize the thermal conductivity.