With the increase of applications of composites in airplane structures

the thermally-induced stresses are critical issues in composite-metal hybrid structures. In order to analyze thermally-induced structural stresses

accurate structural temperature field value is necessary

while the heat transfer performance of the materials is of great importance for the structural temperature field analysis. Due to the anisotropy of heat transfer performance of composites

which is dependent on the layer and structure of laminates

it results in difficulties in evaluation of thermal conductivities. Based on the ASTM E1461

the samples with different structures were designed

and the thermal conductivities in depth direction and in-plane direction of the T800 carbon fiber reinforced resin laminates were tested through flash method. The thermal conductivities for laminates in different stack types were studied. And also

the thermal stack theory of thermal conductivity for composite laminates in in-plane direction was verified. This work provided a fast approach for evaluation of thermal conductivity of carbon fiber reinforced resin matrix laminated composites.