Advanced Treatments of Aramid Fibers for Composite Laminates

Damping and vibration characteristics of basalt-aramid/epoxy hybrid composite laminates

Journal of Polymer Engineering ◽

10.1515/polyeng-2015-0168 ◽

2016 ◽

Vol 36 (2) ◽

pp. 173-180 ◽

Cited By ~ 8

Author(s):

Mehmet Bulut ◽

Ömer Yavuz Bozkurt ◽

Ahmet Erkliğ

Keyword(s):

Composite Laminates ◽

Hybrid Composites ◽

Loss Modulus ◽

Damping Ratio ◽

Vibration Characteristics ◽

Damping Properties ◽

Aramid Fibers ◽

Mixing Ratios ◽

Twill Weave ◽

Response Envelope

Abstract Damping and vibration characteristics of basalt-aramid/epoxy hybrid composites with different basalt/aramid fiber mixing ratios were investigated. Unidirectional basalt and twill weave aramid fibers were used as reinforcement. Non-hybrid basalt/epoxy and aramid/epoxy composite laminates were also fabricated for comparison. Dynamic characteristics of the composite laminates were determined experimentally using dynamic modal analysis. Damping properties were calculated with the logarithmic decrement method using a vibration response envelope curve. Loss modulus, storage modulus and damping ratio of the structures were also considered. It was observed that the results of hybrid configurations showed a distribution between non-hybrid basalt/epoxy and aramid/epoxy composites. Furthermore, the employment of aramid fibers in composite laminates enhances the damping properties of laminates, but reduces the strength values.

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Fabrication of Aramid Fiber Knitted Fabric Reinforced Polypropylene Composites

Advanced Composites Letters ◽

10.1177/096369359800700302 ◽

1998 ◽

Vol 7 (3) ◽

pp. 096369359800700 ◽

Cited By ~ 2

Author(s):

N.K. Cuong ◽

Z. Maekawa

Keyword(s):

Tensile Properties ◽

Composite Laminates ◽

Tensile Tests ◽

Compression Molding ◽

Aramid Fiber ◽

Molding Pressure ◽

Knitted Fabric ◽

Aramid Fibers ◽

Polypropylene Composites ◽

Impregnation Time

In this paper, the effects of fabrication conditions on mechanical properties of aramid fiber knitted fabric reinforced thermoplastic polypropylene composites have been investigated. Composite laminates were fabricated by variation of impregnation time and compression molding pressures. Impregnation of matrix resin into aramid fibers was identified by observing cross-sections of laminates. Tensile tests were carried out on samples cut from the laminates parallel to the wale and course directions. Tensile properties increased with increasing the impregnation time or the compression molding pressure. The tensile properties also display higher in wale direction than in course direction. SEM micrographs of fractured surfaces reveal poor adhesion between aramid fibers and polypropylene matrix.

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