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Relationship between mechanical-property and energy-absorption trends for composite tubesU.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 structures 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.
Document ID
19930007348
Document Type
Technical Publication (TP)
Authors
Farley, Gary L. (Army Vehicle Structures Lab. Hampton, VA., United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1992
Subject Category
COMPOSITE MATERIALS
Report/Patent Number
ARL-TR-29
NASA-TP-3284
L-17087
NAS 1.60:3284
Funding Number(s)
PROJECT: RTOP 505-63-50-08
PROJECT: DA PROJ. 1L1-61102-AH-45
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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