Injection-molded short- and long-glass fiber/polyamide 6,6 composites were subjected to tensile tests. To measure the effectiveness of the fibers in reinforcing the composites, a computational approach was employed to compute the fiber–matrix ISS, orientation factor, reinforcement efficiency, tensile-, and fiber length-related properties. Although the LFCs showed great improvement in fiber characteristics compared to the SFCs, enhancement in tensile properties was small, which is believed to be due to the larger fiber diameter. Kelly–Tyson model provides good approximation for the computation of ISS and tensile-related properties.
YangLThomasonJL. Interface strength in glass fiber-polypropylene measured using the fiber pull-out and microbond methods. Composites Part A2010; 41(9): 1077–1083.
2.
ZhuJImamACraneRLozanoKKhabasheskuVNBarreraEV. Processing a glass fiber reinforced vinyl ester composite with nanotube enhancement of interlaminar shear strength. Compos Sci Technol2007; 67(7–8): 1509–1517.
3.
DoanTGaoSMäderE. Jute/polypropylene composites I. Effect of matrix modification. Compos Sci Technol2006; 66(7–8): 952–963.
4.
BurgstallerC. Comparison of interfacial shear strength from fibre pull out and mechanical testing in polypropylene sisal composites. Int J Mater Prod Technol2009; 36: 11–19.
5.
MillerBMuriPRebenfeldL. A microbond method for determination of the shear strength of a fiber/resin interface. Compos Sci Technol1987; 28: 17–32.
6.
PohBTKwoHK. Peel and shear strength of pressure-sensitive adhesives prepared from epoxidized natural rubber. J Appl Polym Sci2007; 105(2): 680–684.
7.
BentzECMassamLCollinsMP. Shear strength of large concrete members with FRP reinforcement. J Compos Constr2010; 14(6): 637–646.
8.
BowyerWHBaderMG. On the reinforcement of thermoplastics by imperfectly aligned discontinuous fibers. J Mater Sci1972; 7: 1315–1321.
9.
ThomasonJL. Structure-property relationships in glass-reinforced polyamide, Part 1: The effects of fiber content. Polym Compos2006; 27(5): 552–562.
10.
ThomasonJL. Structure-property relationships in glass reinforced polyamide, Part 2: The effects of average fiber diameter and diameter distribution. Polym Compos2007; 28(3): 331–343.
11.
ThomasonJL. Structure-property relationships in glass-reinforced polyamide, Part 3: Effects of hydrolysis ageing on the dimensional stability and performance of short glass-fiber-reinforced polyamide 66. Polym Compos2007; 28(3): 344–354.
12.
ThomasonJL. The influence of fiber length, diameter and concentration on the strength and strain to failure of glass fiber-reinforced polyamide 6,6. Composites Part A2008; 39: 1618–1624.
13.
ThomasonJL. The influence of fiber length and concentration on the properties of glass fiber reinforced polypropylene. 6. The properties of injection molded long fiber PP at high fiber content. Composites Part A2005; 36: 995–1003.
14.
ThomasonJL. The influence of fiber length and concentration on the properties of glass fiber reinforced polypropylene: 7. Interface strength and fiber strain in injection molded long fiber PP at high fiber content. Composites Part A2007; 38: 210–216.
15.
ASTM Standard D638-03. ‘Standard Test Method for Tensile Properties of Plastics’, West Conshohocken, PA: ASTM International, DOI 10.1520/D0638-03, www.astm.org (2003, accessed July 2011).
DenaultJVu-KhanhTFosterB. Tensile properties of injection molded long fiber thermoplastic composite. Polym Compos1989; 10: 313–321.
20.
HassanAYahyaRYahayaAHTahirARMHornsbyPR. Tensile, impact and fiber length properties of injection-molded short and long glass fiber-reinforced polyamide 6,6 composites. J Reinf Plast Compos2004; 23(9): 969–986.
21.
PrestonJ. Polyamides, aromatic. In: MarkHFBikalesNMOverbergerCGMengesG (eds). Encyclopedia of polymer science and engineering, 2nd ed. New York, NY, John Wiley and Sons, 1988; Vol 11. 381–409.
22.
ThomasonJL. Investigation of composite interphase using dynamic mechanical analysis: Artifacts and reality. Polym Compos1990; 11: 105–113.
23.
DrzalLT. The effect of polymeric matrix mechanical properties on the fiber-matrix interfacial shear strength. Mater Sci Eng A1990; 126: 289–293.
24.
CurtisPTBaderMGBaileyJR. The stiffness and strength of a polyamide thermoplastic reinforced with glass and carbon fiber. J Mater Sci1978; 13: 377–390.
25.
MaderEFreitagKH. Influence of an optimized interphase on the properties of polypropylene/glass fiber composites. Composites1990; 21: 397–402.
26.
TakahashiKChoiNS. Influence of fibre weight fraction on the failure mechanisms of poly(ethylene terephthalate) reinforced by short glass fibers. J Mater Sci1991; 26: 4648–4656.
27.
HassanAHornsbyPRFolkesMJ. Structure-property relationship of injection-molded carbon fiber-reinforced polyamide 6,6 composites: The effect of compounding routes. Polym Test2004; 22(2): 185–189.
28.
KellyATysonWR. Tensile properties of fiber-reinforced metals: Copper/tungsten and copper/molybdenum. J Mech Phys Solids1965; 13(6): 329–338.
29.
Bijsterbosch H, Gaymans RJ and Groot NHM. The plastics and rubber institute. In: First International Conference on Deformation and Fracture of Composites, The University of Manchester Institute of Science and Technology, Manchester, UK, 25–27 March 1991, Paper No. 43.
30.
BaderMGCollinsJF. The effect of fiber-interface and processing variables on the mechanical properties of glass-fiber filled nylon 6. Fibre Sci Technol1983; 18: 217–231.
31.
BaderMGBowyerWH. The mechanical properties of thermoplastics strengthened by short discontinuous fibers. J Phys D: Appl Phys1972; 5: 2215–2225.
32.
McNallyDFreedWTShanerJRSellJW. A method to evaluate the effect of compounding technology on the stress transfer interface in short fiber reinforced thermoplastics. Polym Eng Sci1978; 18: 396–403.
33.
BaderMGBowyerWH. An improved method of production for high strength fiber-reinforced thermoplastics. Composites1973; 4: 150–156.
34.
CarlingMJWilliamsJG. Fiber length distribution effects on the fracture of short-fiber composites. Polym Compos1990; 11: 307–313.
