To Problem of Filler Failure in Processing of Fiber-Reinforced Materials

2021 ◽  
Vol 410 ◽  
pp. 656-661
Author(s):  
Svetlana V. Lapshina
Keyword(s):  
Glass Fiber ◽  
Functional Properties ◽  
Polymer Matrix ◽  
Steel Wire ◽  
Fiber Reinforced ◽  
Fiber Glass ◽  
Filled Polymers ◽  
Processing Equipment ◽  
Rubber Mixer ◽  
Fiber Reinforced Materials

Filled polymers seem very promising materials for production. Polymers can be filled with a variety of diverse materials, be it polycaprolactam fiber, glass fiber, or steel wire. Compared to their non-filled counterparts, filled composites have a number of advantages. Production of filled polymers can be challenging due to the processing equipment (the rubber mixer, rollers, and extruders) mixing the fiber with the polymer matrix. In their purest form, polymers mostly don’t have the desired properties, which is why special additives (fillers, plasticizers, dyes, stabilizers, etc.) must be added to obtain the desired functional properties. This is why composites account for an ever greater share of polymers.

Semi-active vibration control of MRF core PMC cantilever sandwich beams: Experimental study

2020 ◽  
Vol 234 (4) ◽  
pp. 574-585
Author(s):  
J Vipin Allien ◽  
Hemantha Kumar ◽  
Vijay Desai
Keyword(s):  
Glass Fiber ◽  
Matrix Composite ◽  
Polymer Matrix ◽  
Polyester Resin ◽  
Magnetorheological Fluid ◽  
Polymer Matrix Composite ◽  
Sandwich Beams ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Fluid Core

The semi-active vibration control of sandwich beams made of chopped strand mat glass fiber reinforced polyester resin polymer matrix composite (PMC) and magnetorheological fluid (MRF) core were experimentally investigated in this study. Two-, four- and six-layered glass fiber reinforced polyester resin polymer matrix composites were prepared using the hand-layup technique. The magnetorheological fluid was prepared in-house with 30% volume of carbonyl iron powder and 70% volume of silicone oil. Nine cantilever sandwich beams of varying thicknesses of the top and bottom layers glass fiber reinforced polyester resin polymer matrix composite beams and middle magnetorheological fluid core were prepared. The magnetorheological fluid core was activated with a non-homogeneous magnetic field using permanent magnets. The first three modes, natural frequencies and damping ratios of the glass fiber reinforced polyester resin polymer matrix composite-magnetorheological fluid core sandwich beams were determined through free vibration analysis using DEWESoft modal analysis software. The amplitude frequency response of the glass fiber reinforced polyester resin polymer matrix composite-magnetorheological fluid core sandwich beams through forced vibration analysis was determined using LabVIEW. The effect of various parameters such as magnetic flux density, thickness of glass fiber reinforced polyester resin polymer matrix composite layers and magnetorheological fluid core layer on the natural frequencies, damping ratio and vibration amplitude suppressions of the glass fiber reinforced polyester resin polymer matrix composite-magnetorheological fluid core sandwich beams was investigated. Based on the results obtained, 2 mm thickness top and bottom layers glass fiber reinforced polyester resin polymer matrix composite and 5 mm thickness magnetorheological fluid core sample have achieved a high shift in increased natural frequency, damping ratio and vibration amplitude suppression under the influence of magnetic flux density.

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