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Article

PENGARUH ORIENTASI SERAT FIBERGLASS TERHADAP KEKUATAN TARIK KOMPOSIT BERMATRIKS EPOKSI MENGGUNAKAN METODE ELEMEN HINGGA

  • Nanang Endriatno

Dinamika : Jurnal Ilmiah Teknik Mesin, Vol. 17 No. 1 (2025)

Baca di situs jurnal doi.org/10.55679/djitm.v17i1.27

Abstrak

Fiberglass reinforced composite materials with epoxy matrix are widely used in structural applications due to their high strength-to-weight ratio and good corrosion resistance. One of the critical factors that affects the mechanical properties of composites is fiber orientation. This study aims to analyze the effect of fiber orientation on stress and strain of E-glass reinforced epoxy composite using finite element method simulations, with specimens adjusted according to ASTM D 638 standards for tensile testing. The variations of fiber orientation used are 0°/0°/0°/0°, 0°/90°/90°/0°, and 0°/45°/-45°/0°. The composite model is modeled as four layers of lamina. Testing is carried out numerically through tensile loading simulations using finite element methods. Tensile loading is carried out to obtain the maximum stress and maximum strain of the composite structure. The simulation results show the maximum stress values ​​from high to low, respectively: 63,3290 MPa at 0°/90°/90°/0°, then 57,6940 at 0°/45°/-45°/0°, and the lowest 44,1670 at 0°/0°/0°/0°. For maximum strain values ​​from high to low, respectively: 0,0024 at 0°/90°/90°/0°, then 0,0022 at 0°/45°/-45°/0°, and the lowest 0,0017 at 0°/0°/0°/0°. In the 0°/0°/0°/0° configuration, all fiber layers are parallel to the tensile loading direction. Under these conditions, the fibers can withstand maximum tensile loads along the longitudinal direction. Consequently, the maximum stress that occurs is relatively minor because the load is distributed almost entirely along the fiber direction, resulting in a lower maximum strain value compared to other laminate configurations. This study confirms that fiber orientation significantly affects the mechanical properties of E-glass-epoxy composites and that numerical simulations can be used as a valid alternative to experimental tensile tests.

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