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Efficient simulation of low-velocity impacts on composite sandwich panels

Kärger, Luise and Baaran, Jens and Teßmer, Jan (2008) Efficient simulation of low-velocity impacts on composite sandwich panels. Computers & Structures, 86 (9), pp. 988-996. Elsevier Ltd.. DOI: 10.1016/j.compstruc.2007.04.029. ISSN 0045-7949.

Full text not available from this repository.

Abstract

For efficiently simulating the damage resistance of sandwich panels subjected to low-velocity impacts, the finite element based damage tolerance tool CODAC has been enhanced. While sandwich structures are very weight efficient and provide integrated acoustic and thermal insulation, impact damage can provoke a significant strength and stability reduction. Therefore, the objective of CODAC is to provide methodologies which reliably simulate impact events and predict impact damage sizes. Since frequent design loops require a quick analysis, efficient deformation and failure models are desired. To achieve a rapid and accurate stress analysis, a recently developed three-layered finite shell element is applied. Failure analysis is based on a progressive damage mechanics approach: Damage initiation is detected by stress-based failure criteria. Material resistance is reduced by appropriate, step-wise linear degradation models. An experimental impact test program on honeycomb sandwich panels is used to validate the impact simulation of the FE-tool CODAC. Comparisons between impact tests and simulations showed that CODAC is capable of accurately and rapidly simulating impact events, which induce barely visible damage. Furthermore, the onset of clearly visible damage is correctly predicted.

Document Type:Article
Title:Efficient simulation of low-velocity impacts on composite sandwich panels
Authors:
AuthorsInstitution or Email of Authors
Kärger, LuiseUNSPECIFIED
Baaran, JensUNSPECIFIED
Teßmer, JanUNSPECIFIED
Date:March 2008
Journal or Publication Title:Computers & Structures
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:86
DOI:10.1016/j.compstruc.2007.04.029
Page Range:pp. 988-996
Editors:
EditorsEmail
Bathe, K.J.UNSPECIFIED
Topping, B.H.V.UNSPECIFIED
Publisher:Elsevier Ltd.
ISSN:0045-7949
Status:Published
Keywords: Impact simulation; Impact damage; Sandwich structures; Damage mechanics; Finite element analysis
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Doris Ries
Deposited On:23 Sep 2008
Last Modified:27 Apr 2009 15:13

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