scope:

Abstract:

Following vibration test and bakeout of the OSTM Advanced Microwave Radiometer (AMR) Reflector Structure Assembly (RSA), it was discovered that thermal stress had caused delamination in the joint between metallic fittings and the graphite composite skin of the RSA. The joints were subsequently reinforced with bolts. Although adhesive bonding provides an elegant design solution for joining spacecraft structures and other components, alternative joining methods such as mechanical fasteners should be considered where environmental stress analysis suggests uncertainty in the safety margins. Evaluate thermal stress of bonded joints early in the design phase, and perform coupon tests that accurately represent the joint application.