Abstract :
Composite materials are already very rapidly developing in the world of
engineering. One use of composites is to combine two or more different composite
components in order to fill the shortcomings of each other or often referred to as hybrid
composites. One type of hybrid composite that is very potential is the hybrid lamina
composite, because the hybrid lamina composite itself is a composite that can combine
several reinforcing fibers with several layers that can be varied very widely both from the
side of the angular direction, variety of fibers, and so forth. Natural fiber pineapple
leaves have a tensile strength of 356 - 432 Mpa where with the value of the tensile
strength of natural fibers pineapple leaves have good potential because it is very
abundant at a low price to be made fiber in composites but need to be done further
research
From the discussion above, this study refers to the manufacture of composite
lamina hybrid with natural fibers pineapple leaves and fiberglass whit matrix epoxy
intended to obtain data on the influence of the angle direction of pineapple leaf fibers to
bending strength in accordance with the standards that have been determined before.
Based on bending strength tests that have been conducted on hybrid composite
specimens of fiberglass and pineapple leaf fibers that have been conducted with
variations in the angle of pineapple leaf fibers. So obtained the largest bending strength
value in the direction of pineapple angle fibers 0°, where with an average bending
strength value of 194.4175 Mpa. This can happen because pineapple leaf fibers with an
angle of 0° is a direct longitunal axis with the x-axis, where the longitudinal axis is an
axis perpendicular to the direction of the coming vertical force that is weighed by the
bending test machine so that it can withstand the load very well. The price of strength in
the direction of the 45° angle of pineapple leaf fiber can be said to be a critical angle
because it is the angle with the weakest bending power with an average bending strength
value of 132,4451 Mpa on this hybrid composite of fiberglass and leaf fiber. Compared to
the angle of pineapple leaf fibers 0 and 90