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Modelling soft body impact on composite structures

Johnson, A. and Holzapfel, M. (2002) Modelling soft body impact on composite structures. 14th US national congress of theoretical and applied mechanics, Blacksburg, VA, USA, 23-28 Juni 2002.

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Abstract

The paper describes recent progress on materials modelling and numerical simulation of soft body impact damage in fibre reinforced composite structures. The work is based on the application of finite element (FE) analysis codes to imulate composite shell structures under impact loads arising, for example, from bird strike on a wing leading edge. An improved composites ply damage mechanics model and interply delamination model have been implemented in an explicit FE code which is used to predict impact damage in shell structures. Soft body impactors such as gelatine (substitute bird) or ice (hailstones) are highly deformable on impact and flow over the structure spreading the impact load. They are modelled by a particle method in which the FE mesh is replaced by interacting particles. The failure models and code developments are applied to the numerical simulation of gas gun impact tests in which gelatine projectiles are fired at glass fabric/epoxy cylindrical shells.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2003,
Title:Modelling soft body impact on composite structures
Authors:
AuthorsInstitution or Email of Authors
Johnson, A.UNSPECIFIED
Holzapfel, M.UNSPECIFIED
Date:2002
Status:Published
Keywords:impact, composite structures, soft bodies, bird strike, modelling, damage mechanics, delamination, SPH methods
Event Title:14th US national congress of theoretical and applied mechanics, Blacksburg, VA, USA, 23-28 Juni 2002
Organizer:US National Committee for Theoretical & Applied Mechanics
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 22:31

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