Page 33 - Research Report 2021 - Institut für Leichtbau und Kunststofftechnik

InSituRotor

Investigation of damaged fibre-reinforced high-speed rotors
using in-situ measurement systems

The relationship between damage state and dynamic behaviour of fast rotat- Period
ing composite rotors was investigated within this collaborative project. This 01.06.2017 – 31.07.2021
required the development of novel measurement systems that allow the si-
multaneous in-situ measurement of damage state and vibration behaviour Project management
during rotation. The in-plane strain field and the out-of-plane vibration were Prof. Dr.-Ing. habil. Maik Gude
measured by optically reading out diffraction grating sensors on the rotor
surface (see Fig. 1). The measurement of strain fluctuations on the rotating Contact
composite disc demonstrated that the crack propagation can be tracked spa- Tino Wollmann
tially resolved and as a function of the rotational velocity, which allowed an in- Dr.-Ing. Angelos Filippatos
situ quantification of the damage state of the rotor. Using optical coherence
tomography (OCT), high-resolution three-dimensional images were taken in Project partners
order to investigate the cracks, their propagation as well as the opening and • Laboratory for Measurement and
closing process in composite samples. Furthermore, the OCT system allowed Sensor System Technique (MST) at the
the visualization of the composite rotor and its textile architecture under ro- Institut of Principles of Electrical and
tational load (see Fig. 2). These experimental results were used to validate Electronic Engineering at the
numerical models that describe the velocity-dependent damage state and TU Dresden
the resulting change in vibration behaviour. • Clinical Sensoring and Monitoring (KSM)
at the Faculty of Medicine Carl Gustav
Carus at the TU Dresden

Funding
Funded by

German Research Foundation
German Research Foundation (DFG)
Project number: GU 614/14-1

© ILK, MST and KSM
Fig. 01 Test setup for measurements using a diffraction grating sensor (left) and compos-
ite rotor with applied sensors and excitation system (right).

© ILK, MST and KSM
Fig. 02 Sections from the three-dimensional acquisition of the composite disc using OCT.

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