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Design and Performance of energy Absorbing Subfloor Structures in Aerospace Applications

Johnson, A, and Kohlgrüber, D. (2000) Design and Performance of energy Absorbing Subfloor Structures in Aerospace Applications. IMechE Seminar S672: Materials and Structures for Energy Absorption, London, 9 May 2000.

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Abstract

Composite elements such as glass or carbon fibre reinforced tubes in axial crush exhibit high specific energy absorption and a challenge for the engineer is to utilise these properties in structural applications. The paper considers the application of composites in the design of helicopter and aircraft subfloors with a dual function of beeing structural elements under flight loads, which may be triggered to absorb energy by folding and crushing under crash loads. Examples discussed are an energy absorbing (EA) floor beam concept for a general aviation aircraft based on sandwich webs with glass and aramid fabric/epoxy face plates and box element core, and a modular helicopter subfloor concept with hybrid carbon/aramid/epoxy beams and cruciform elements. Progress on the development of design tools for these crashworthy structures based on FE simulation is also discussed and simulation results compared with crash test data.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2001,
Title:Design and Performance of energy Absorbing Subfloor Structures in Aerospace Applications
Authors:
AuthorsInstitution or Email of Authors
Johnson, A, UNSPECIFIED
Kohlgrüber, D.UNSPECIFIED
Date:2000
Status:Published
Keywords:composite, glass fibre, carbon fibre, epoxy, crash, test, simulation, axial crushing, aircraft
Event Title:IMechE Seminar S672: Materials and Structures for Energy Absorption, London, 9 May 2000
Organizer:Institute of Mechanical Engineers, England
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 22:19

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