국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Relationship Between Mechanical-Property and Energy-Absorption Trends for Composite Tubes
저자	Gary L. Farley
Keyword	Energy absorption; Composite tubes; Crushing mechanisms; Carbon-epoxy; Glass-epoxy; Kevlar-epoxy
URL	http://techreports.larc.nasa.gov/ltrs/PDF/tp3284.pdf
보고서번호	NASA TP-3284
발행년도	1992
출처	NASA Langley Research Center
ABSTRACT	U.S. Army helicopters are designed to dissipate prescribed levels of crash impact kinetic energy without compromising the integrity of the fuselage. Because of the complexity of the energy-absorption process, it is imperative for designers of energy-absorbing structures to develop an in-depth understanding of how and why composite structures absorb energy. A description of the crushing modes and mechanisms of energy absorption for composite tubes and beams is presented. Three primary crushing modes of composite structure including transverse shearing, lamina bending, and local buckling are described. The experimental data presented show that fiber and matrix mechanical properties and laminate stiffness and strength mechanical properties cannot reliably predict the energy-absorption response of composite tubes.