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A novel virtual material layer model for predicting natural frequencies of composite bolted joints
- Source :
- Chinese Journal of Aeronautics, Vol 34, Iss 8, Pp 101-111 (2021)
- Publication Year :
- 2021
- Publisher :
- Elsevier, 2021.
-
Abstract
- A novel virtual material layer model based on the fractal theory was proposed to predict the natural frequencies of carbon fiber reinforced plastic composite bolted joints. Rough contact surfaces of composite bolted joints are modeled with this new proposed approach. Numerical and experimental modal analyses were conducted to validate the effectiveness of the proposed model. A good consistence is noted between the numerical and experimental results. To demonstrate the necessity of accurately modeling the rough contact surfaces in the prediction of natural frequencies, virtual material layer model was compared with the widely used traditional model based on the Master-Slave contact algorithm and experiments, respectively. Results show that the proposed model has a better agreement with experiments than the widely used traditional model (the prediction accuracy is raised by 8.77% when the pre-tightening torque is 0.5 N∙m). Real contact area ratio A* of three different virtual material layers were calculated. Value of A* were discussed with dimensionless load P*, fractal dimension D and fractal roughness G. This work provides a new efficient way for accurately modeling the rough contact surfaces and predicting the natural frequencies of composite bolted joints, which can be used to help engineers in the dynamic design of composite materials.
- Subjects :
- 0209 industrial biotechnology
Materials science
Composite number
Aerospace Engineering
02 engineering and technology
Surface finish
01 natural sciences
Fractal dimension
010305 fluids & plasmas
Composite joints
020901 industrial engineering & automation
Fractal
Mechanical model
0103 physical sciences
Motor vehicles. Aeronautics. Astronautics
business.industry
Mechanical Engineering
TL1-4050
Structural engineering
Fibre-reinforced plastic
Virtual material layer
Modal
Bolted joint
Natural frequency
Fractal theory
business
Contact area
Subjects
Details
- Language :
- English
- ISSN :
- 10009361
- Volume :
- 34
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- Chinese Journal of Aeronautics
- Accession number :
- edsair.doi.dedup.....37b6d08827e77b95fe98b6f91c214c6a