Short beam strength of curaua, sisal, glass and hybrid composites

Lais Vasconcelos da Silva, Jose Humberto Santos Almeida Junior*, Clarissa Coussirat Angrizani, Sandro Campos Amico

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)
49 Downloads (Pure)


In this study, the short beam strength characteristics of randomly oriented composites were comprehensively investigated. The following parameters were varied: fiber used (curaua or sisal), fiber washing or surface chemical treatment with sodium hydroxide/sodium borohydride, fiber length (from 5 to 60 mm), hybridization with glass fiber and the pre-processing of the polyester resin. The overall fiber volume fraction was kept constant (30 vol.%). In all configurations, the composites containing curaua fiber obtained higher short beam strength than those with sisal. An increase in fiber length yielded higher short beam strength. The optical and electronic micrographs showed mostly horizontal cracks, typical of shear failure. In addition, it was carried out a study of the ASTM D2344 standard regarding the span-to-thickness ratio recommended for testing, the measured strength decreased for higher span-to-thickness ratio for specimens with higher length and width, and the failure mode changed to bending around span-to-thickness >12.
Original languageEnglish
Pages (from-to)197-206
Number of pages10
JournalJournal of Reinforced Plastics and Composites
Issue number3
Early online date22 Nov 2012
Publication statusPublished - 01 Feb 2013
Externally publishedYes


Dive into the research topics of 'Short beam strength of curaua, sisal, glass and hybrid composites'. Together they form a unique fingerprint.

Cite this