Chapter
Jul 11, 2012
Simulating the Response of a Composite Honeycomb Energy Absorber, Part 1: Dynamic Crushing of Components and Multi-Terrain Impacts
Authors: K. Jackson [email protected], E. Fasanella [email protected], and M. Polanco [email protected]Author Affiliations
Publication: Earth and Space 2012: Engineering, Science, Construction, and Operations in Challenging Environments
Abstract
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® 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 ®. 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.
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© 2012 American Society of Civil Engineers.
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Published online: Jul 11, 2012
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NASA Langley Research Center, Mail Stop 495, 12 West Bush Road, Hampton, VA 23681-2199. E-mail: [email protected]
National Institute of Aerospace, Mail Stop 495, NASA Langley Research Center, Hampton, VA 23681-2199. E-mail: [email protected]
ATK Space Systems, Inc., Mail Stop 495, NASA Langley Research Center, Hampton, VA 23681-2199. E-mail: [email protected]
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