Effect of fibre surface treatment on yielding and fracture behaviour of glass fibre-polypropylene composite
- 66 Downloads
Two parallel studies of the mechanical properties of composites based on modified polypropylene is presented. The fillers used were either uncoated-glassy fibres or glassy fibres coated with aluminium. The tensile properties and fracture behaviour are investigated as a function of filler content over a range of temperatures and strain rates. The measured elastic modulus, tensile strength, and fracture parameters, Gc and Kc, showed dependencies on filler content. The observed enhancement is found to be remarkable in the case of composites containing uncoated surface treated glass fibres. The tensile yield stress of all the composites prepared showed strain rate and temperature dependence. Stress activation volume and activation energy of single-activated yielding processes are determined. The observed fracture morphology could explain the reinforcement behaviour of the measured mechanical properties.
KeywordsTensile Strength Elastic Modulus Fracture Behaviour Fibre Surface Filler Content
Unable to display preview. Download preview PDF.
- 2.M. A. Meyers and O. T. Inal, in “Frontiers in Materials Technologies” (Elsevier, Amsterdam, 1985) Ch. 12.Google Scholar
- 3.R. M. Gill, in “Carbon Fibers in Composites Materials” (The Plastic Institute, London, 1972).Google Scholar
- 13.M. S. Ahmad, M. K. Abdelazeez, A. M. Zihlif, E. Martuscelli, G. Ragosta and E. Scafora, Polymer Composites, in press.Google Scholar
- 15.N. Brown, in “Failure of Plastics”, edited by W. Brostow and R. D. Cornelliussen, Ch. 6 (Hanser Publishers, Munich, 1986).Google Scholar
- 22.J. G. Williams, in “Fracture Mechanics of Polymers” Ellis Horwood Limited, New York, 1984) pp. 238–292.Google Scholar
- 23.A. J. Kinloch and R. I. Young, in “Fracture Behaviour of Polymers” (Applied Science Publishers, London, 1983) pp. 74–106.Google Scholar
- 24.R. Greco and G. Ragosta, Plast. Rubb. Proc. Appl. 7 (1987) 163.Google Scholar