Charpy Impact Test of Epoxy Matrix Composites Reinforced with Buriti Fibers

Abstract

The buriti (Muritia flexuosa) fiber are among the lignocellulosic fibers with apotential to be used as reinforcement of polymer composites. In recent years, the buriti fiber has been characterized for its properties as an engineering natural material. The toughness of buriti composites remains to be a evaluated. Therefore, the present work evaluated the toughness of epoxy composites reinforced with different amounts of buriti fibers by means of Charpy impact tests. It was found a significant increase in the impact resistance with the volume fraction of buriti fibers. Fracture observations by scanning electron microscopy revealed the mechanism responsible for this toughness behavior.

Effect of blend composition on characteristics and performance of Jatropha bio-epoxy/epoxy matrix in composites with carbon fiber reinforcement

“…For pure resin, the failure mode of 0 wt%, 25 wt%, 30 wt%, and 40 wt% bio-epoxy involved complete breakage into two pieces, but 50 wt% broke but still held as one piece. A similar report on neat epoxy was obtained by Barbosa et al (2014). The 50 wt% bio-epoxy was ductile and soft, which explained its ability to absorb high impact energy compared to others.…”

Charpy Impact Tests of Epoxy Composites Reinforced with Giant Bamboo Fibers

“…In fact, upon impact, the specimen bent around the hammer but did not separate in two parts due to the flexibility of some unbroken fibers. Similar situation occurred for impact tests of epoxy composites reinforced with 30% of other lignocellulosic fibers [38][39][40][41][42][43][44][45] . The reason for decohesion at the fiber/matrix interface, allowing longitudinal cracks to propagate and release intact giant bamboo fibers from the epoxy matrix, can be assigned to the low interfacial shear stress of any lignocellulosic fiber 17 .…”

“…In previous works on Charpy impact test of epoxy matrix composites reinforced with other lignocellulosic fibers [38][39][40][41][42][43][44][45] , an exponential increase in impact energy was also observed. Table 1 compares Charpy impact energy results of epoxy matrix composites reinforced with different lignocellulosic fibers.…”

“…This certainly introduces comparatively more defects in the microfibrils that constitute each fiber. The other lignocellulosic fibers [38][39][40][41][42][43][44][45] are extracted from the corresponding plant by softer natural processes such as retting (water immersion) and drying. In these separation processes, the fiber structure remains practically intact 17 .…”

Low velocity impact performance of natural fibre reinforced polymer composites: a review

“…Nascimento et al [73] and Barbosa et al [74] compared the Charpy impact energy of epoxy composites reinforced with different volume fractions of Mallow and Buriti fibres. They used ASTM D6110 standard to test the specimens and found that the best results were obtained by the composite with 30% vol of untreated Mallow and Buriti fibres, which absorbed 905.49 ± 94.56 J m −1 and 114.17 ± 14.37 J m −1 , respectively.…”