Thermal Conductivity Carbon Fiber Laminate

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.

Thermal conductivity carbon fiber laminate.

At room temperature the thermal conductivity in the 0 direction is 7 times that in the 90 direction. On the one hand these carbonaceous fillers possess high thermal conductivity which act as functional component to enhance the thermal conductivity of composite laminate. T700 and m55j are the most common carbon fiber types. Infrared image analysis was used to determine the emissivity of the composite.

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. The in plane thermal conductivity of cfrp is expected to attain to 120 w m k thermal conductivity of 2024 t3 aluminum alloys is about 120 w m k in the satellite structure. On the other hand these fillers may bridge continuous carbon fiber reinforcements to transfer heat more effectively or directly form continuous through thickness conductive network. 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.

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. For the multidirectional sample the thermal conductivity ranges from 0 22 w mk at 5 7 k to 2 98 w mk. Emissivity and thermal conductivity of carbon fiber epoxy laminates were characterized beforehand.