Abstract: This paper disscuses the development of carbon/epoxy stringer preforms of a corrugated cylinder for a certain type of satellite.The change of the property of the resin matrix during curing process is studied by using a method called Dynamic Dielectric Analysis (DDA) to determine the optimum technological parameters for prebleeding of the prepreg and the precompaction of the preforms.The curing degree of the preforms is also determined using the dielectric loss curves. The forming of the preforms are carried out on a soft-hard sectional die and the preforms developed satisfy the requirements of the manufacture of the carbon/epoxy corrugated cylin- der which has passed the ground mechanical tests later.

Key words: Carbon fiber reinforced comosite, Structural member, Loss measurement, Performance test