CAUTION! HONEYCOMB CORE CAN BE DANGEROUS TO YOUR PROGRAM'S HEALTH

摘要

Honeycomb bonded assemblies have been used extensively in aerospace because they are extremely structurally efficient, particularly in stiffness critical designs. However, honeycomb assemblies are challenging to build and some have had a rather dismal in-service record. This paper will discuss the difficulties involved in building honeycomb assemblies and will highlight some of the in-service problems experienced by both military and commercial users. Fabrication difficulties include blown core, core migration, and skin-to-core unbonds. In-service problems are usually a result of liquid water ingression into the honeycomb cells resulting in core corrosion (aluminum core), node bond and skin-to-core degradation and occasionally, face sheet separation. Alternate design and construction concepts to honeycomb bonded assemblies will be presented, with an emphasis on integrally cocured unitized structure.