The results of a comprehensive review of the field of crash impact characteristics of advanced troop transport helicopter airframe structures constructed of composite materials is presented. Currently available information was surveyed on: the crash impact behavior of composite materials,
the analytical tools for design of crashworthy airframe structures, and the airframe structure crashworthiness design criteria. Information on the crash impact behavior of composite materials was found to be limited. However, some interesting studies were found, including an automotive study
which showed that by innovative design, composite materials could function efficiently as energy absorbers to reduce crash impact loads. Several promising analytical tools were found, but some test validation is needed. Conclusions are presented from studies that evaluated the use of the KRASH
and DYCAST programs for the analysis of typical helicopter composite structures. Finally, effects of composite materials on the compliance of airframe structures with current Army crashworthiness requirements were investigated.
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Document Type: Research Article
Bell Helicopter Textron, Fort Worth, Texas
Publication date: 1981-10-01
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