Damping of carbon fibre-reinforced plastics plates with holes

ABSTRACT

This paper mainly deals with the specific damping capacity (SDC) of carbon fibre-reinforced plastics (CFRP) plates with holes of different sizes, positions and quantity control. Through establishing a three-dimensional damping matrix and using the finite element analysis (FEA) and Matlab, numerical calculations were conducted on the SDC of CFRP plates with same layering scheme, and a vibration test as well as a damping analysis was implemented on the CFRP test pieces with middle holes. By comparing the calculation and experimental results, good accuracy was found in predicting the modal frequency as well as SDC of the CFRP vibrations through the three-dimensional damping matrix analysis model. By comparing the modal damping of plates with different hole sizes, it could be found that as the hole size increases, the frequency showed a slowly changing tendency. The SDC of the plates with holes could reach 170% of that of the plates without holes.

KEYWORDS:

• Specific damping capacity (SDC)
• carbon fibre-reinforced plastics plates (CFRP)
• different size of holes
• holes at different positions

Disclosure statement

No potential conflict of interest was reported by the authors.

Data availability statement

The data used to support the findings of this study are included within the article.

Additional information

Funding

This work was supported by Research Project of Hubei Provincial Department of Education, China [grant number B2018186].