Effects of short-fiber shape on tensile properties of reinforced rubber |
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Authors: | S R Ryu D J Lee |
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Affiliation: | (1) School of Mechanical Engineering, Yeungnam University, 214-1, Daedong, Gyoungsan, Gyoungbuk, 712-749, Korea |
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Abstract: | The tensile properties under various conditions were investigated to ascertain the optimum conditions to yield the best tensile
properties. Fiber aspect ratio (AR: length of fiber/diameter of fiber), diameter ratio (DR: sphere diameter of dumbbell/diameter
of fiber), interphase condition and fiber content were all considered as variables which impact the tensile strength, tensile
moduli, pull-out force. In general, under good interphase conditions the tensile strength increased when the fiber aspect
ratio was more than 20. The short-fiber reinforced SBR with a big end (DR = 3) did not show the dilution effect under interphase
conditions when the fiber aspect ratio was more than 20. In case of short-fiber reinforced NR, when the specimen had DR = 3
and AR≥20, the dilution effect only showed up in the no-coated one. The tensile moduli were significantly improved due to
the fiber aspect ratio, fiber content and good interphase at the same diameter ratio. The pull-out force increased with the
diameter ratio, and keeping the diameter ratio the same, better interphase conditions also resulted in a higher pull-out force.
Overall, it was found that the fiber aspect ratio, fiber diameter ratio, and interphase condition all have an important effect
on tensile properties. |
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