Modal frequency and damping analysis of tow steered CFRP composite plates

Author(s)

Pereira, D. A. ; Guimaraes, T. A. M. ; Rade, D. A. ; Desmet, W ; Pluymers, B ; Moens, D ; Rottiers, W

• Document type: Journal article
• Source: PROCEEDINGS OF INTERNATIONAL CONFERENCE ON NOISE AND VIBRATION ENGINEERING (ISMA2018) / INTERNATIONAL CONFERENCE ON UNCERTAINTY IN STRUCTURAL DYNAMICS (USD2018); v. N/A, p. 16-pg., 2018-01-01.

Abstract

In composite materials, previous studies show that carbon-fiber reinforced polymers (CFRP) can be designed in terms of damping characteristics by acting on its physical and geometric features. In recent years, the development of automatic fiber placement (AFP) allows the realization of variable stiffness composite laminates (VSCL), among which tow steered composites are considered very promising. Therefore, the objective of this paper is to present a numerical assessment of the influence of fiber steering on the modal damping of CFRP plates for different fiber trajectories. The dynamic model is derived by using a semi-analytical approach based on the combination of the Classical Lamination Theory with the Rayleigh-Ritz (Assumed-Modes) approach. The modal damping factors are calculated using the Strain Energy Method, which is based on the ratio between the stored and the dissipated energies, giving the specific damping capacity (SDC) for each vibration mode. (AU)

• FAPESP's process: 15/20363-6 - Fault tolerant identification and control of rotating systems
• Grantee: Katia Lucchesi Cavalca Dedini
• Support Opportunities: Research Projects - Thematic Grants