elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Impact Behavior and Residual Strength of Sandwich Structural Elements Under Static and Fatigue Loading

Gädke, M. and Baaran, J. and Goetting, H.-C. and Rolfes, R. (2001) Impact Behavior and Residual Strength of Sandwich Structural Elements Under Static and Fatigue Loading. In: 42nd AIAA/ASME/ASCE/AHS/ASC,Structures, Structural Dynamics, and Materials Conference and Exhibit. 42nd AIAA/ASME/ASCE/AHS/ASC,Structures, Structural Dynamics, and Materials Conference and Exhibit, Seattle, Washington, 16.-19. April 2001. ISBN 1-46347-499-9.

Full text not available from this repository.

Abstract

The extent of impact damage in sandwich structures depends on the core material and the stacking sequence of the sandwich skin laminate, the size, mass and velocity of the impactor and on the ability of the component to absorb the shock at the impact point. Because of the complex interaction between these parameters the forecast of the damage and the progress under Tension-Tension (T-T), Tension-Compression (T-C) and Compression-Compression (C-C) fatigue loading is difficult to conduct. Impact damage is most critical, when the skin remains intact. Except of a small dent or blister in the skin surface the impacted zone is often barely visible. Nevertheless, the damage may grow under fatigue loading to a critical size, where the component is endangered. In sandwich structures with foam core a delamination will be detected most likely around the impacted zone between skin and core. The damage progress is triggered by the local buckling of the delaminated skin layer. In structures with Honeycomb core delaminations are hardly detected after impact (see Figure 1). The core is crumpled in the vicinity of the impacted zone and the elastic support of the skin layers is reduced. Under compressive loading the core shrinks in thickness direction and the skin layer may buckle in core direction

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2001,
Title:Impact Behavior and Residual Strength of Sandwich Structural Elements Under Static and Fatigue Loading
Authors:
AuthorsInstitution or Email of Authors
Gädke, M.UNSPECIFIED
Baaran, J.UNSPECIFIED
Goetting, H.-C.UNSPECIFIED
Rolfes, R.UNSPECIFIED
Date:2001
Journal or Publication Title:42nd AIAA/ASME/ASCE/AHS/ASC,Structures, Structural Dynamics, and Materials Conference and Exhibit
ISBN:1-46347-499-9
Status:Published
Event Title:42nd AIAA/ASME/ASCE/AHS/ASC,Structures, Structural Dynamics, and Materials Conference and Exhibit, Seattle, Washington, 16.-19. April 2001
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: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Institut für Strukturmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 16:09

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.