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

Next Generation Train - Auslegung einer Unterbodenverkleidung aus thermoplastischen Verbundwerkstoffen unter Schotterschlag

Vinot, Mathieu and Schlie, Dorothea and Behling, Tobias and Holzapfel, Martin (2022) Next Generation Train - Auslegung einer Unterbodenverkleidung aus thermoplastischen Verbundwerkstoffen unter Schotterschlag. CU Sitzung AG Strukturelle Integrität & Composite Fatigue, 12. April 2022, Online Veranstaltung.

Full text not available from this repository.


Railway transportation represents an environmentally friendly alternative to automotive transportation for long distance travel. In the project Next Generation Train of the DLR, new railway solutions are developed for passenger and freight transportation for a broad range of applications (intercity, cargo, long distance…). Specifically, the high-speed train NGT HST aims at reducing travel times and specific energy consumption with new technologies. At the maximal operating speed of 400 km/h, the coupling of mechanical and aerodynamical forces leads to increasing risks of ballast stone impact on the train structures (in particular underbody structures), thus threatening primary components underneath. Through the repetition of stone impacts during the entire lifetime of a structure, critical damage can occur and reparation or replacement concepts are required. The present work aims at investigating an impact-resistant underbody structure made out thermoplastic composite materials for the HST train on numerical and experimental basis. By considering multiple impact scenario in the structure sizing process, the project intends to reduce the interval at which the structure has to be replaced and to lower security factors. Starting with two combinations of thermoplastics and preforms, an experimental test campaign is performed on specimen scale to investigate their impact resistance at low velocities. The most promising material is then tested on component level under high-velocity impact at the gas gun DLR facility. Tests on single ballast stones are performed as well for validation of the numerical methodology. As support to time and material expensive test methods, a numerical framework is developed within LS-DYNA at all levels from low to high impact velocities. The composite parts are automatically modelled with stacked TSHELL and cohesive-element interfaces via *PART_STACKED_ELEMENT. Composite materials and interface use the state-of-the-art material models *MAT_262 and *MAT_240 respectively. Random ballast stones geometries are automatically generated with the Voronoi tessellation and simulated with DEM particles.

Item URL in elib:https://elib.dlr.de/187759/
Document Type:Conference or Workshop Item (Speech)
Title:Next Generation Train - Auslegung einer Unterbodenverkleidung aus thermoplastischen Verbundwerkstoffen unter Schotterschlag
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Vinot, MathieuMathieu.Vinot (at) dlr.dehttps://orcid.org/0000-0003-3394-5142
Schlie, DorotheaDorothea.Schlie (at) dlr.deUNSPECIFIED
Behling, TobiasTobias.Behling (at) dlr.deUNSPECIFIED
Holzapfel, Martinmartin.holzapfel (at) dlr.deUNSPECIFIED
Date:12 April 2022
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:high velocity impact, railway ballast, composite simulation, thermoplastics, DEM method
Event Title:CU Sitzung AG Strukturelle Integrität & Composite Fatigue
Event Location:Online Veranstaltung
Event Type:Other
Event Dates:12. April 2022
Organizer:Composite United
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Rail Transport
DLR - Research area:Transport
DLR - Program:V SC Schienenverkehr
DLR - Research theme (Project):V - NGT BIT
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Structural Integrity
Deposited By: Vinot, Mathieu
Deposited On:08 Nov 2022 09:15
Last Modified:18 Nov 2022 14:31

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.