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STRUCTURAL ROBUSTNESS ANALYSIS OF ANISOGRID LATTICE STRUCTURES

Wagner, Ronald and Hühne, Christian and Niemann, Steffen (2015) STRUCTURAL ROBUSTNESS ANALYSIS OF ANISOGRID LATTICE STRUCTURES. 20th International Conference on Composite Materials, 19.-24. Juli. 2015, Copenhagen, Denmark.

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Abstract

The purpose of this paper is to compare the structural robustness of anisogrid composite lattice structures with orthogrid composite structures when subjected to axial compression. Due to multiple redundant load paths the anisogrid structure should have a higher structural robustness in comparison to orthogrid structures. Within the framework of the EU-Project PoLaRBEAR (Production and Analysis Evolution for Lattice Related Barrel Elements under Operations with Advanced Reliability) anisogrid composite lattice structures are investigated in terms of a suitable primary fuselage alternative for aircrafts. The structural energy, the area under the load-shortening curve between several characteristic points such as the ultimate and collapse load, is evaluated using nonlinear FEM simulations in order to assess the structural robustness of anisogrid composite structures. The results indicate an overall higher structural robustness of the anisogrid structures in comparison to the orthogrid structures for different load cases. In addition anisogrid structures seem to be more insensitive to the simulated impact damages than orthogrid structures. As result, an answer is given if the anisogrid structure concept is a suitable design concept for fuselage structures in commercial aircrafts in terms of structural robustness.

Item URL in elib:https://elib.dlr.de/102159/
Document Type:Conference or Workshop Item (Speech)
Title:STRUCTURAL ROBUSTNESS ANALYSIS OF ANISOGRID LATTICE STRUCTURES
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wagner, Ronaldronald.wagner (at) dlr.deUNSPECIFIED
Hühne, Christianchristian.huehne (at) dlr.deUNSPECIFIED
Niemann, Steffensteffen.niemann (at) dlr.deUNSPECIFIED
Date:2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:Structural robustness, post-buckling, grid-stiffened panels, Anisogrid
Event Title:20th International Conference on Composite Materials
Event Location:Copenhagen, Denmark
Event Type:international Conference
Event Dates:19.-24. Juli. 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Wagner, Ronald
Deposited On:14 Jan 2016 12:32
Last Modified:10 May 2016 23:42

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