SIFAT MEKANIK KOMPOSIT SANDWICH BERPENGUAT SERAT BAMBUFIBERGLASS DENGAN CORE POLYURETHANE RIGID FOAM
ABSTRACT: Strong and rigid
material is needed to restrain the bending load. Sandwich construction is
applied when the stiff light material is needed. Fiberglass is a high strength
fibers, while the bamboo fiber is a strong natural fiber. Both of these fiber
reinforce composite resin. Compressive strength, bending strength and specific
gravity of sandwich composites were discussed in this paper. Composite sandwich
with fiberglass-bamboo fiber reinforcement and with a polyurethane rigid foam
core sheet 25 mm have been manufactured and tested. Composite sandwich made by
two laminated skin and a core. The number of layers fiber and type of composite
sandwich were varieted in this study. There was no striking difference in the
value of compressive strength of sandwich composite with variations of amount
reinforcement layers of the skin. The compressive strength on edge area showed
that the number and the type of layer on the skin will determine compressive
strength. The compressive strength on the edge area will increase by increasing
the number of layers. Bamboo lamina gives a better compressive strength than
the fiberglass lamina. Sandwich composite density was lower than the average
density of wood, it was ranged from 97.1 to 392.1 kg/m . The bending test was
conducted by using four-point bending to determine the bending strength. The
highest bending strength of the composite was obtained at 798 N/cm 3 . This
value is owned by composite variants with skin consists of two layers of woven
bamboo combined with 1 layer of fiberglass.
Penulis: Agus Dwi Catur,
Paryanto D.S., Sinarep Sinarep, Nanang Prayitno
Kode Jurnal: jptmesindd140183
