PERBANDINGAN JUMLAH LAMINASI KOMPOSIT SERAT KARBON TERHADAP KEKUATAN TARIK DAN IMPACT

This study investigates the influence of laminate number and fiber orientation
concerning the durability in tension and resistance of impact to epoxy resin–based
carbon fiber composites. Laminates with 2, 4, 6, and 8 layers were produced
through the vacuum bagging technique, employing two different fiber orientations
(0°/90° and 45°/45°). Mechanical properties were evaluated according to ASTM
D638-1 for tensile testing and ASTM D6110 Charpy method for impact testing.
Results indicate that the tensile strength increases proportionally with the
number of layers, with the 0°/90° orientation consistently outperforming the
45°/45° configuration. The maximum tensile strength of 13.241 N/mm² was
obtained in the 8-layer 0°/90° specimen. In contrast, the impact tests revealed that
the 45°/45° orientation exhibited superior toughness, particularly in the 6-layer
configuration, achieving a maximum value of 0.641 J/mm². The observed
differences are attributed to variations in load distribution and fiber resistance to
crack propagation.
In conclusion, increasing the number of laminates enhances the overall
mechanical performance of composites, while fiber orientation must be selected
based on specific application requirements. The 0°/90° orientation is more suitable
for tensile load–bearing applications, whereas the 45°/45° orientation is
advantageous under impact loading. These findings provide valuable insights for
the aerospace and composite manufacturing industries in optimizing laminate
design to achieve a balance between strength and toughness.