NDLI: Simulating the response of a composite honeycomb energy absorber. part 1; dynamic crushing of components and multi-terrain impacts

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Simulating the response of a composite honeycomb energy absorber. part 1; dynamic crushing of components and multi-terrain impacts

Content Provider	NASA Technical Reports Server (NTRS)
Author	Polanco, Michael A. Fasanella, Edwin L. Jackson, Karen E.
Copyright Year	2012
Description	This paper describes the experimental and analytical evaluation of an externally deployable composite honeycomb structure that is designed to attenuate impact energy during helicopter crashes. The concept, designated the Deployable Energy Absorber (DEA), utilizes an expandable Kevlar (Registered Trademark) honeycomb to dissipate kinetic energy through crushing. The DEA incorporates a unique flexible hinge design that allows the honeycomb to be packaged and stowed until needed for deployment. Experimental evaluation of the DEA included dynamic crush tests of multi-cell components and vertical drop tests of a composite fuselage section, retrofitted with DEA blocks, onto multi-terrain. Finite element models of the test articles were developed and simulations were performed using the transient dynamic code, LSDYNA (Registered Trademark). In each simulation, the DEA was represented using shell elements assigned two different material properties: Mat 24, an isotropic piecewise linear plasticity model, and Mat 58, a continuum damage mechanics model used to represent laminated composite fabrics. DEA model development and test-analysis comparisons are presented.
File Size	5303021
Page Count	24
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20120008167
Archival Resource Key	ark:/13960/t3vt6n83t
Language	English
Publisher Date	2012-04-15
Access Restriction	Open
Subject Keyword	Composite Materials Aircraft Safety Helicopters Crushing Impact Tests Stress-strain Diagrams Finite Element Method Aircraft Accidents Simulation Terrain Drop Tests Fuselages Rotary Wing Aircraft Honeycomb Structures Composite Structures Kinetic Energy Kevlar Trademark Energy Absorption Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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