An Investigation of the Effects of Fiber Volume Fraction on the Impact Properties of Fiber Reinforced Composite Laminated Plates

This paper is aiming to research the impact behavior of flax fiber reinforced PP laminates considering the end use of the products. Flax yarn and Polypropylene (PP) filaments were twisted together with three fiber volume fraction 0.45, 0.50 and 0.60 to form the commingled yarns which were woven into fabrics as prepreg with plain and twill structures respectively. The prepregs of different layers were pressed into flax reinforced PP composites in the process of hot-pressing. The laminates with different fiber volume fraction, layer, and woven structure were tested and analyzed respectively aiming at the impact resistibility in succession. SEM micrograph of the impact fracutured surface was observed and analyzed as well. The results reveal that the impact properties of laminates with twill structures are prior to those of laminates with plain structures when other technical parameters are the same. The ability of impact resistibility of flax reinforced PP laminates improves with the increase of the fibre volume fraction, layer amount and impact velocity respectively in this research.

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Interlaminar stress distribution of composite laminated plates with functionally graded fiber volume fraction

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2009.12.027 ◽

2010 ◽

Vol 31 (6) ◽

pp. 2904-2915 ◽

Cited By ~ 16

Author(s):

Yiming Fu ◽

Pu Zhang ◽

Fan Yang

Keyword(s):

Stress Distribution ◽

Fiber Volume Fraction ◽

Volume Fraction ◽

Functionally Graded ◽

Laminated Plates ◽

Fiber Volume ◽

Interlaminar Stress ◽

Composite Laminated Plates

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Short Fiber Reinforced Composite: The Effect of Fiber Length and Volume Fraction

The Journal of Contemporary Dental Practice ◽

10.5005/jcdp-7-5-10 ◽

2006 ◽

Vol 7 (5) ◽

pp. 10-17 ◽

Cited By ~ 28

Author(s):

Lippo V.J. Lassila ◽

Pekka K. Vallittu ◽

Sufyan K. Garoushi

Keyword(s):

Mechanical Properties ◽

Fiber Length ◽

Volume Fraction ◽

Testing Machine ◽

Short Fiber ◽

Bending Test ◽

Fiber Reinforced ◽

Fiber Volume ◽

Fiber Reinforced Composite ◽

Reinforced Composite

Abstract Aim The aim of this study was to determine the effect of short fiber volume fraction and fiber length on some mechanical properties of short fiber-reinforced composite (FRC). Methods and Materials Test specimens (2 x 2 x 25 mm3) and (9.5 x 5.5 x 3 mm3) were made from short random FRC and prepared with different fiber volumes (0%-22%) and fiber lengths (1-6 mm). Control specimens did not contain fiber reinforcement. The test specimens (n=6) were either dry stored or thermocycled in water (x10.000, 5 – 55°C) before loading (three-point bending test) according to ISO 10477 or statically loaded with a steel ball (Ø 3.0 mm) with a speed of 1.0 mm/min until fracture. A universal testing machine was used to determine the flexural properties and the load-bearing capacity. Data were analyzed using analysis of variance (ANOVA) (p=0.05) and a linear regression model. Results The highest flexural strength and fracture load values were registered for specimens with 22 vol% of fibers (330 MPa and 2308 N) and with 5 mm fiber length (281 MPa and 2222 N) in dry conditions. Mechanical properties of all test specimens decreased after thermocycling. ANOVA analysis revealed all factors were affected significantly on the mechanical properties (p<0.001). Conclusions By increasing the volume fraction and length of short fibers up to 5 mm, which was the optimum length, the mechanical properties of short FRC were improved. Citation Garoushi SK, Lassila LVJ, Vallittu PK. Short Fiber Reinforced Composite: The Effect of Fiber Length and Volume Fraction. J Contemp Dent Pract 2006 November;(7)5:010-017.

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