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ICSS 12, Presentation: Improved failure Description for an analytical Dimensioning Approach for Inserts in Honeycomb Sandwich Elements

Wolff, Johannes (2018) ICSS 12, Presentation: Improved failure Description for an analytical Dimensioning Approach for Inserts in Honeycomb Sandwich Elements. In: ICSS 12 (International Conference on Sandwich Structures). ICSS 12 International Conference on Sandwich Structures, 19.-22.08.2018, Lausanne, Schweiz.

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Abstract

To reduce the mass of connections and local load introductions on sandwich elements, the use of insert elements are popular to generate removable connections or local load introductions on sandwich elements, since they offer a superior lightweight potential over joints with bolted connections directly set into the sandwich. Yet, lightweight structures made of sandwich elements with fiber reinforced face sheets and honeycomb core are still limited to special applications. One reason is the lack of straightforward calculation as well as standardized testing methods just for the insert type with the best lightweight performance, the core connected (i. e. potted), through-the-thickness insert type. Since a permanent shear buckling in the cell walls around the insert occurs as first relevant damage, the shear stress progression around an insert is critical for its load carrying capability. In order to find a mechanical-analytical based dimensioning approach, the authors summarized available mechanical models, able to predict the shear stress state around punctual loads on sandwich elements. To reduce the mass of connections and local load introductions on sandwich elements, the use of insert elements are popular to generate removable connections or local load introductions on sandwich elements, since they offer a superior lightweight potential over joints with bolted connections directly set into the sandwich. Yet, lightweight structures made of sandwich elements with fiber reinforced face sheets and honeycomb core are still limited to special applications. One reason is the lack of straightforward calculation as well as standardized testing methods just for the insert type with the best lightweight performance, the core connected (i. e. potted), through-the-thickness insert type. Since a permanent shear buckling in the cell walls around the insert occurs as first relevant damage, the shear stress progression around an insert is critical for its load carrying capability. In order to find a mechanical-analytical based dimensioning approach, the authors summarized available mechanical models, able to predict the shear stress state around punctual loads on sandwich elements.

Item URL in elib:https://elib.dlr.de/121583/
Document Type:Conference or Workshop Item (Speech)
Title:ICSS 12, Presentation: Improved failure Description for an analytical Dimensioning Approach for Inserts in Honeycomb Sandwich Elements
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wolff, Johannesjohannes.wolff (at) dlr.dehttps://orcid.org/0000-0001-8775-9025
Date:21 August 2018
Journal or Publication Title:ICSS 12 (International Conference on Sandwich Structures)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmail
Keller, ThomasEPFL Switzerland
Yanes Armas, SoniaEPFL Switzerland
Carlsson, Leif A.Florida Atlantic University (FAU), USA
Frostig, YeoshuaTechnicon - Israel Institute of Technology, Israel
Status:Published
Keywords:sandwich, connection, joint, local load introduction, honeycomb, insert, mechanical model, sizing, dimensioning
Event Title:ICSS 12 International Conference on Sandwich Structures
Event Location:Lausanne, Schweiz
Event Type:international Conference
Event Dates:19.-22.08.2018
Organizer:Lausanne, EPFL - CCLab Composite Construction Laboratory
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Next Generation Train III (old), L - Structures and Materials, R - Raumfahrzeugsysteme - Konzepte und Entwurf, V - Energie und Verkehr
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Wolff, Johannes
Deposited On:13 Dec 2018 06:07
Last Modified:13 Dec 2018 06:07

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