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TENSILE STRENGTH OF POLYESTER MATRIX COMPOSITES REINFORCED WITH GIANT BAMBOO (DENDROCALMUS GIGANTEUS) FIBERS

Articles

Journal/Conference:

20TH BRAZILIAN CONFERENCE ON MATERIALS SCIENCE AND ENGINEERING

Language:

English

Author:

Margem Frederico Muylaert; de Souza Martins Lucas Barboza

Experts:

Monteiro Sergio Neves; Loiola Romulo Leite; Oliveira Michel Picanco

Year:

2014

Volume:

775-776

Pages:

308-313

Keywords:

giant bamboo fiber; polyester composite; tensile properties; fracture analysis

Fibers of the giant bamboo (Dendrocalmus giganteus) are amongst the strongest lignocellulosic fibers. Although studies have been already performed, limited information exists on the mechanical properties of polymeric composites reinforced with continuous and aligned giant bamboo fibers. This work evaluates the tensile strength of this type of composite. Standard tensile specimens were fabricated with up to 30% of fibers aligned along the specimen length. The fibers were press-molded with a commercial polyester resin mixed with a hardener and cured for 24 hours at room temperature. The specimens were tensile tested in an Instron machine and the fracture surface analyzed by scanning electron microscopy. The tensile strength increased significantly with the amount of giant bamboo fiber reinforcing the composite. This performance can be associated with the difficult of rupture imposed by the fibers as well as with the type of cracks resulting from the bamboo fiber/polyester matrix interaction, which prevents rupture to occur.