PENGARUH MODEL ANYAMAN 3D SERAT CANTULA TERHADAP KARAKTERISTIK SERAPAN BUNYI KOMPOSIT UNSATURATED POLYESTER RESIN (UPRS) - CANTULA 3D
Abstract: The aim
of this research
is to investigate
sound absorption coefficient characteristics of natural fiber composite, it is formed from cantula
fiber woven as the reinforcement and UPRs resin as the matrix. The cantula
woven fiber models are varied in four types AI, LAIS, LAIW, OI at 40 % fibre
weight. The manufacture precede by plaiting
the continous twisted cantula fiber and continue with making the sample
that have 10 cm roundness longitudinal section. After that the acoustical characteristic spesimen
are tested by
impedance tube method
with varies frequencies include
125 Hz, 160 Hz, 200 Hz, 250 Hz, 315 Hz,
400 Hz, 500 Hz, 630 Hz, 800 Hz, 1000 Hz, 1250 Hz, 1600 Hz, 2000Hz and then the
surface roughness of spesimen are tested
by contact-stylus profilometer.
The result of
this research presents the varied
woven models cause cantula 3D - UPRs
skin composite have different surface
roughness value and it influence
to sound absorbing
coefficient value of cantula 3D
- UPRs skin composite. 3D - UPRs
skin composite reinforced LAIW wovens cantula model form the best wovens model
because this models has maximum
absorbing coefficient in
almost all frequency
that is tested
and it has highest roughness value (Ra) average (as
big as 26.865 μm) too.
Keywords: Absorption
coefficient, Impedance tube method, Surface roughness, Composites, Woven model,
Cantula
Penulis: Dody Ariawan, Wijang
Wisnu R , Windiarto
Kode Jurnal: jptmesindd090031
