Vibration-buckling tests on heated composite plates

Álvarez, J. G.; Abramovich, Haim; Bisagni, C.

doi:10.1016/j.jsv.2022.117145

Vibration-buckling tests on heated composite plates

Title

Vibration-buckling tests on heated composite plates

Author

Álvarez, J. G. (Student TU Delft)
Abramovich, Haim (Technion)
Bisagni, C. (TU Delft Aerospace Structures & Computational Mechanics)

Date

2022

Abstract

This paper presents an experimental investigation on vibrations of heated composite plates leading to thermal buckling. The tests were performed considering two main goals: the application of the Vibration Correlation Technique for the detection of thermal buckling in composite plates; and the exploration of the frequency variations before and after the occurrence of a mode jump in post-buckling regime. Two test setups were used. The setups shared a low thermal expansion frame, while they differentiate on the type of heating source and mechanical boundary conditions. Two composite plates with layups [30/−30/5/−5]_s and [35/−35/10/−10]_s were tested. The plates were excited acoustically using a loudspeaker, and the vibration frequencies were monitored and stored using a laser vibrometer. Buckling temperatures were successfully detected using the Vibration Correlation Technique. Frequency changes, potentially related to the mode jumping, were also detected.

Subject

Carbon fibre
Modal testing
Thermal buckling
Thermal testing
Vibration Correlation Technique

To reference this document use:

http://resolver.tudelft.nl/uuid:8866cddc-64ad-461a-9b59-83aadf8dfa72

DOI

https://doi.org/10.1016/j.jsv.2022.117145

ISSN

0022-460X

Source

Journal of Sound and Vibration, 536

Part of collection

Institutional Repository