Natural frequency responses of hybrid polymer/carbon fiber/FG-GNP nanocomposites paraboloidal and hyperboloidal shells based on multiscale approaches

2021 ◽  
Vol 119 ◽  
pp. 107111
Author(s):  
Emad Sobhani ◽  
Amir R. Masoodi
Keyword(s):  
Carbon Fiber ◽  
Natural Frequency ◽  
Hybrid Polymer ◽  
Frequency Responses

The Effects of Fiber Volume Fraction on the Experiment Modal Behavior of 45°/-45° Carbon Fiber Plain Woven Fabric/Epoxy Resin Composites

2012 ◽  
Vol 583 ◽  
pp. 150-153
Author(s):  
Qian Liu ◽  
Xiao Yuan Pei ◽  
Jia Lu Li
Keyword(s):  
Carbon Fiber ◽  
Epoxy Resin ◽  
Natural Frequency ◽  
Fiber Volume Fraction ◽  
Volume Fraction ◽  
Laminated Composites ◽  
Woven Fabric ◽  
Resin Composites ◽  
Fiber Volume ◽  
Epoxy Resin Composites

The modal properties of carbon fiber woven fabric (with fiber orientation of 45°/-45°) / epoxy resin composites with different fiber volume fraction were studied by using single input and single output free vibration of cantilever beam hammering modal analysis method. The effect of different fiber volume fraction on the modal parameters of laminated composites was analyzed. The experimental results show that with the fiber volume fraction increasing, the natural frequency of laminated composites becomes larger and damping ratio becomes smaller. The fiber volume fraction smaller, the peak value of natural frequency becomes lower and the attenuating degree of acceleration amplitude becomes faster.

The Effects of Fiber Volume Fraction on the Experiment Modal Behavior of 30°/-60° Carbon Fiber Plain Woven Fabric / Epoxy Resin Composites

2011 ◽  
Vol 331 ◽  
pp. 175-178
Author(s):  
Xiao Yuan Pei ◽  
Jia Lu Li
Keyword(s):  
Carbon Fiber ◽  
Epoxy Resin ◽  
Natural Frequency ◽  
Fiber Volume Fraction ◽  
Volume Fraction ◽  
Laminated Composites ◽  
Damping Ratio ◽  
Test Method ◽  
Woven Fabric ◽  
Fiber Volume

A study on dynamic mechanical properties of carbon fiber plain woven fabric (with fiber orientation of 30°/-60°) / epoxy resin laminated composites with different fiber volume fraction was carried out. The test method is single input single output free vibration of cantilever beam hammering modal analysis method. The effect of different fiber volume fraction on the modal parameters of laminated composites was analyzed. The experimental results show that with the fiber volume fraction increasing, the natural frequency of laminated composites becomes larger and damping ratio becomes smaller. The fiber volume fraction is greater, the peak value of natural frequency becomes higher and the attenuating degree of acceleration’ amplitude becomes slower.

scholarly journals Vibration Characteristics of Carbon Fiber Reinforced Polymer Composites under Varying Fiber Orientation Composition

2019 ◽  
Vol 9 (2) ◽  
pp. 2905-2918
Keyword(s):  
Carbon Fiber ◽  
Natural Frequency ◽  
Mode Shape ◽  
Fiber Orientation ◽  
Composite Plates ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

Many engineering applications today are increasingly made of laminated composite plates. The properties of laminated composite plates can change as the laminate and fiber composition change, enabling the engineering structure and components to be customized according to the desired static or dynamic properties. Therefore, it is of interest to investigate variation in dynamic properties of composites under different fiber orientation composition to forecast their vibration response. In this study, the natural frequency and mode shape of carbon fiber-reinforced polymer composite plates were obtained numerically under varying composition of the 0°, ±45° and 90° fiber orientations. Sixteen different cases were simulated using finite element method, showing changes in the natural frequency and mode shape of carbon fiber-reinforced polymer composite plates with changes in the composition of the fiber orientation. The first five values of natural frequency and mode shape of the composite laminate were reported and analyzed using a surface regression method. In addition, the effect of the stacking sequence on the natural frequency of the composite plate having the same orientation composition was also analyzed. Comparison with previous studies showed good agreement of the present numerical modeling. Numerical results indicate potential to develop relationships to estimate modal properties based on composition of fiber orientation.

The Effects of Fiber Orientation on the Vibration Modal Behavior of Carbon Fiber Plain Woven Fabric/Epoxy Resin Composites

2011 ◽  
Vol 391-392 ◽  
pp. 345-348 ◽  
Author(s):  
Xiao Yuan Pei ◽  
Jia Lu Li
Keyword(s):  
Carbon Fiber ◽  
Epoxy Resin ◽  
Natural Frequency ◽  
Fiber Orientation ◽  
Volume Fraction ◽  
Damping Ratio ◽  
Woven Fabric ◽  
Resin Composites ◽  
Fiber Volume ◽  
Epoxy Resin Composites

The modal properties of carbon fiber woven fabric / epoxy resin composites with different fiber orientation angles were studied by using single input single output free vibration of cantilever beam hammering modal analysis method. With the same fiber volume fraction, the different fiber orientation of the laminated composite has an effect on parameters of vibration mode of composites. The experimental results show that with the fiber orientation increasing, the natural frequency of laminated composites becomes smaller and damping ratio becomes larger. The fiber orientation smaller, the peak value of natural frequency becomes higher and the attenuating degree of acceleration amplitude becomes slower.

The Theoretical Prediction and Experimental Verification of Modal Parameters for Carbon Fiber Reinforced Composites with Sandwich Structure

2011 ◽  
Vol 194-196 ◽  
pp. 2415-2419
Author(s):  
Guo Li Zhang ◽  
Ya Nan Wang ◽  
Jia Lu Li ◽  
Guang Wei Chen ◽  
Li Chen ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibre ◽  
Rectangular Plate ◽  
Natural Frequency ◽  
Flexural Vibration ◽  
Woven Fabric ◽  
Core Material ◽  
Sandwich Composite ◽  
Modal Shape ◽  
Modal Test

A innovative structure of sandwich composite rectangular plate with dimensions of 350 ×83.5×9.5mm was designed, it was made of unidirectional prepreg of carbon fibre and woven fabric prepreg of carbon fiber as face materials and paulownia as core material by hand lay-up performing and press molding technology for investigating the dynamic performance such as natural frequency and modal shapes. Based on testing the in-plane and out-plane mechanical properties of composite samples reinforced by unidirectional carbon fibre and carbon fiber woven fabric, a ANSYS FEA dynamic modeling was developed. According to the impulse response modal test method, a modal test system was established. The natural frequency test results showed that the minimum natural frequency of sandwich composite rectangular plate is about 616.45Hz which is higher about 27.5% than that of aluminum rectangular plate reinforced by carbon. The modal experiment indicated that the 1st modal shape, 2nd modal shape, 3rd modal shape and 4th modal shape of the sandwich composite rectangular plate were torsional vibration, flexural vibration shape, torsional flexural vibration and double-flexural vibration separately. It was found the calculating precision of FEA dynamic predication was very high, the dynamic predicating results by FEA could provide fundamental data to the optimal design high speed reciprocating sandwich composite rectangular parts.

The Effects of Fiber Volume Fraction on the Experiment Modal Behavior of 0°/90° Carbon Fiber Plain Woven Fabric/Epoxy Resin Composites

2012 ◽  
Vol 182-183 ◽  
pp. 85-88
Author(s):  
Yan Gao ◽  
Jia Lu Li
Keyword(s):  
Carbon Fiber ◽  
Epoxy Resin ◽  
Natural Frequency ◽  
Fiber Volume Fraction ◽  
Volume Fraction ◽  
Laminated Composites ◽  
Damping Ratio ◽  
Test Method ◽  
Woven Fabric ◽  
Fiber Volume

A study on dynamic mechanical properties of carbon fiber plain woven fabric (with fiber orientation of 0°/90°) / epoxy resin laminated composites with different fiber volume fraction was carried out. The test method is single input single output free vibration of cantilever beam hammering modal analysis method. The effect of different fiber volume fraction on the modal parameters of laminated composites was analyzed. The experimental results show that with the fiber volume fraction increasing, the natural frequency of laminated composites becomes larger and damping ratio becomes smaller. The fiber volume fraction is greater, the peak value of natural frequency becomes higher and the attenuating degree of acceleration’ amplitude becomes slower.

Excellent mechanical properties of carbon fiber semi-aligned electrospun carbon nanofiber hybrid polymer composites

RSC Advances ◽  
2016 ◽  
Vol 6 (43) ◽  
pp. 36715-36722 ◽  
Author(s):  
S. R. Dhakate ◽  
A. Chaudhary ◽  
A. Gupta ◽  
A. K. Pathak ◽  
B. P. Singh ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Polymer Composites ◽  
Carbon Nanofiber ◽  
Hybrid Polymer ◽  
Carbon Fiber Fabric ◽  
Fiber Fabric

The excellent mechanical properties of carbon fiber fabric hybrid polymer composites is achieved by integrating continuous semi-aligned carbon nanofiber layers in the interlaminar region between carbon fiber fabric plies.

Vibratory System Identification of 3D Printed Cantilever

2018 ◽  
Author(s):  
Daniel Crifasi ◽  
Matthew Ergle ◽  
Hüseyin Özdeş ◽  
Edmon Perkins
Keyword(s):  
Carbon Fiber ◽  
3D Printing ◽  
Natural Frequency ◽  
High Speed ◽  
Damping Ratio ◽  
Thermoplastic Composites ◽  
Vibratory System ◽  
Vibratory Response ◽  
3D Printed ◽  
Materials Used

Although 3D printing has become a widespread method of fabrication, the vibratory properties of thermoplastic composites are poorly understood. This is, in part, due to the anisotropies introduced by the 3D printing process, the composite materials used, and the geometry. In this study, an attempt has been made to characterize the vibratory response of a 3D printed thermoplastic cantilever, in order to determine the damping ratio and natural frequency. The cantilevered beams were 3D printed, with a range of varied parameters. These parameters include the inclusion and exclusion of continuous carbon fiber reinforcement, as well as the three orthogonal build directions. Impact tests and frequency sweeps were used to gain information about the vibratory response of these cantilevers. This information was used to model the effects of the carbon fiber and anisotropy introduced by the different build parameters. During the experiments, a high-speed camera was used to record the response of the cantilevers. These videos were then post-processed with image analysis tools to quantify the response. Then, a point near the tip of the cantilever was used as the time-dependent variable for a reduced order model. By proceeding in this described method, the damping ratio and natural frequency of the system may be written as a function of the build parameters.

scholarly journals Experimental investigation of free vibration analysis on fibre metal composite laminates

2019 ◽  
Vol 13 (4) ◽  
pp. 5753-5763
Author(s):  
M. N. M. Merzuki ◽  
M. R. M. Rejab ◽  
M. S. M. Sani ◽  
Bo Zhang ◽  
Ma Quanjin
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Free Vibration ◽  
Glass Fiber ◽  
Natural Frequency ◽  
Metal Composite ◽  
Fiber Metal Laminates ◽  
Fiber Metal ◽  
Carbon Fiber Epoxy

Fiber metal laminates (FMLs) offer significant improvement over current available materials for structure materials due the excellent mechanical properties. In this work, the dynamical mechanical properties of the carbon fiber/epoxy, glass fiber/epoxy, aluminium 2024-T0, and fiber metal laminates was carried out. The composite materials have been manufactured by hot press machine. Non-destructive testing techniques are being used in the characterization of composite materials. In this work, free vibration analyses by striking an impact hammer at the free end were conducted to determine the dynamic characteristics of the samples. The results show that combination glass fiber/epoxy with aluminium 2024-T0 offer greater natural frequency value compare to carbon fiber/epoxy with aluminium 2024-T0. The laminate thickness of play a dominant role in differences of natural frequency values.    

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