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Integration of fibre-optical sensor in a GFRP transverse leaf spring for validation purposes of finite-element-simulation

Grünheid-Ott, Thomas and David, Christoph and Deißer, Oliver and Schmidt, Raphael (2023) Integration of fibre-optical sensor in a GFRP transverse leaf spring for validation purposes of finite-element-simulation. International Conference on Vehicle Body Engineering 2023 (VBE2023), 2023-11-02 - 2023-11-03, Porto, Portugal.

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Fibre-reinforced components are increasingly being used in today's automobiles. In the chassis area, glass-fibre reinforced longitudinal and transverse leaf springs have been used in passenger cars and vans since the early 1980s. In research and in patents, there are various approaches to provide wheel guidance by glass-fibre reinforced transverse leaf springs without wishbones. A real implementation however, has not yet been found in the relevant literature. Two innovations are explored in this work. The first is the implementation of a glass-fiber reinforced transverse leaf spring, replacing metal coil springs and the stabiliser bar. In combination with a newly compiled development process based on a virtual optimization process on stacking and geometry, significant lightweight advantages can be achieved. The second is a method for comparing FE-Simulations (Finite-Element) to an extensive examined physical testing campaign on a prototype glass-fiber reinforced transverse leaf spring. The implementation of optical fiber sensors (beside strain gauges, DIC and photogrammetry) allows to extract thousand strain measurements per meter and per timestep during testing. Focus is placed on the development and usage of a virtual fiber sensor that automatically builds up in (and connects to) the simulation model allowing the direct comparison of measured strain with simulated strain. The deformation of the FE model with the virtual or real sensor fibre can be directly visualized in a developed graphical user interface (GUI). The evaluations provide statements on the validity of the selected boundary condition modelling between leaf spring and vehicle body, so that the transverse leaf spring can be optimised in the overall chassis context. The approach is promising and has, due to its simplicity in application, the potential to be used in the future on all kind of mechanical structural tests for extensive simulation validation or adjustment purposes.

Item URL in elib:https://elib.dlr.de/200399/
Document Type:Conference or Workshop Item (Speech)
Title:Integration of fibre-optical sensor in a GFRP transverse leaf spring for validation purposes of finite-element-simulation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Grünheid-Ott, ThomasDeutsches Zentrum für Luft- und Raumfahrt e.V.UNSPECIFIEDUNSPECIFIED
Deißer, OliverUNSPECIFIEDhttps://orcid.org/0000-0002-7328-2761UNSPECIFIED
Date:2 November 2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Glas fibre reinforced plastics, automatisation, fibre-optical sensor, strain measurement, validation, leaf spring, suspension, finite element
Event Title:International Conference on Vehicle Body Engineering 2023 (VBE2023)
Event Location:Porto, Portugal
Event Type:international Conference
Event Start Date:2 November 2023
Event End Date:3 November 2023
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - V&V4NGC - Methoden, Prozesse und Werkzeugketten für die Validierung & Verifikation von NGC
Location: Stuttgart
Institutes and Institutions:Institute of Vehicle Concepts > Vehicle Architectures and Lightweight Design Concepts
Deposited By: Grünheid, Thomas
Deposited On:12 Jan 2024 14:28
Last Modified:24 Apr 2024 21:00

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