Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 43, Issue 3, Pages 353-362Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2011.12.004
Keywords
Polymer-matrix composites (PMCs); Fiber/matrix bond; Mechanical properties; Fractography
Funding
- CNPq
- CAPES
- FAPERJ
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This paper presents morphology, physical and strength properties of piassava fiber, a very rigid fiber having a potential to be used as composite reinforcement. Composites of continuous and aligned piassava fibers with and without alkali treatment dispersed in epoxy matrix were subjected to three point bend, tensile, and Izod impact tests. Composites with fibers above 20 vol.% showed an effective reinforcement behavior both in flexural and tensile tests, while the impact energy linearly increased for the amount of piassava fibers used in this study. Fractographic study revealed a relatively weaker fiber/matrix adhesion acting as preferential site for crack nucleation. Evidence was also found for crack arrest by the fiber above 20 vol.%. This, together with spiny surface protrusion in the piassava fibers, was found to be responsible for the reinforcement of the epoxy composites. (C) 2011 Elsevier Ltd. All rights reserved.
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