Sifat-sifat Lentur Papan Partikel Komposit Kulit Kacang Tanah/Epoksi

Abstract

Flexural properties, i.e. load-displacement response, flexuralstrength,
failure strain and modulus, of peanut shell particle-reinforced epoxy
composites have been investigated. Four different fiber contents, i.e. 0,
20, 30 and 40 vol%, have been fabricated by means of press mold
technique, and two particle sizes of passing through of mesh 11 but not
for mesh 16, and passing through 16 sievers have been utilized.
Specimen preparation and testing were carried out in accordance with
the ASTM D1037. Failure modes were evaluated by closely observing
representative photo macrographs of randomly selected failed
specimens. The result revealed that the finer the particles, the higher
the flexural strength and flexural modulus. To the contrary, finer
particle size resulted in lower strain to failure. Almost all specimens
show considerably linear lateral force-deflection relations up to close
to failure. Specimens being produced using coarser particles achieved
the highest flexural strength and modulus of 38.69 MPaand 2.141
GPa, respectively, at Vf = 20%, while the highest flexural strain to
failure of 2.48 % was achieved atVf = 40%. Specimens being produced
using finer particles achieved the highest lentur strength and strain to
failure of 43.77 MPa and 2.01 %, respectively, at Vf = 30%, while the
highest lenturmodulus of 2.618 GPa was achieved at Vf = 40%. Unlike
pure epoxy specimens which underwent brittle fracture along with
broken into pieces, those filled with peanut particles underwent singleplane
brittle fracture.