PENINGKATAN PERFORMA ADHESIVE BONDING CFRP (CARBON FIBER REINFORCED POLYMER) MELALUI VARIASI SAMBUNGAN DENGAN METODE MECHANICAL INTERLOCKING MODIFIKASI COPPER INTERLAYER (Cu)

SHIFA RAHMA MARITZA, . (2026) PENINGKATAN PERFORMA ADHESIVE BONDING CFRP (CARBON FIBER REINFORCED POLYMER) MELALUI VARIASI SAMBUNGAN DENGAN METODE MECHANICAL INTERLOCKING MODIFIKASI COPPER INTERLAYER (Cu). Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh variasi geometri sambungan dan metode mechanical interlocking menggunakan copper interlayer (Cu) terhadap sifat mekanik sambungan adhesive bonding Carbon Fiber Reinforced Polymer (CFRP). Material yang digunakan berupa laminat CFRP berbasis serat karbon woven twill dengan matriks epoxy yang disambung menggunakan perekat struktural Araldite® 2015. Variasi sambungan terdiri atas Single Lap Joint (SLJ) dan Scarf Joint (SJ) dengan tiga perlakuan, yaitu tanpa interlayer (TI), menggunakan copper interlayer (IT), serta anchored dan copper interlayer (AIT). Copper interlayer dimodifikasi menjadi pola segitiga menonjol (spiked interlayer) yang terinspirasi dari konsep bio-inspired mechanical interlocking melalui mekanisme penjangkaran (anchoring effect) pada sistem perakaran tumbuhan. Pengujian dilakukan menggunakan uji tarik berdasarkan ASTM D5868, sedangkan analisis mode kegagalan mengacu pada ASTM D5573. Data dianalisis melalui perhitungan tegangan tarik maksimum, regangan, modulus elastisitas, dan karakteristik patahan sambungan. Hasil penelitian menunjukkan bahwa variasi geometri sambungan dan penggunaan mechanical interlocking memberikan pengaruh terhadap performa mekanik sambungan CFRP. Konfigurasi Scarf Joint menghasilkan distribusi tegangan yang lebih merata sehingga memiliki performa lebih baik dibandingkan Single Lap Joint. Penggunaan modified copper interlayer mampu meningkatkan mekanisme penguncian (anchoring effect) antara adhesive dan permukaan CFRP sehingga memperbaiki transfer beban pada daerah sambungan. Variasi terbaik diperoleh pada konfigurasi SJ-AIT dengan tegangan tarik rata-rata sebesar 14,79 MPa, regangan 2,35%, dan modulus elastisitas 1714,54 MPa. Hasil penelitian menunjukkan bahwa kombinasi geometri Scarf Joint dan mechanical interlocking menggunakan modified copper interlayer efektif dalam meningkatkan kekuatan dan keandalan sambungan adhesive CFRP serta berpotensi menjadi alternatif desain sambungan pada aplikasi struktural komposit. Kata kunci: CFRP, adhesive bonding, copper interlayer, mechanical interlocking, single lap joint, scarf joint, uji geser.*****This study aims to analyze the effect of joint geometry variation and the mechanical interlocking method using a copper interlayer (Cu) on the mechanical properties of adhesive-bonded Carbon Fiber Reinforced Polymer (CFRP) joints. The material used was woven twill carbon fiber-reinforced epoxy laminate bonded with Araldite® 2015 structural adhesive. The joint configurations consisted of Single Lap Joint (SLJ) and Scarf Joint (SJ), each with three treatment variations: without an interlayer (TI), with a copper interlayer (IT), and with an anchored copper interlayer (AIT). The copper interlayer was modified into a protruding triangular (spiked) pattern inspired by a bio-inspired mechanical interlocking concept, utilizing an anchoring mechanism analogous to plant root systems. Tensile testing was conducted in accordance with ASTM D5868, while failure mode analysis followed ASTM D5573. The experimental data were evaluated based on maximum tensile stress, strain, elastic modulus, and joint fracture characteristics. The results indicate that both joint geometry and the mechanical interlocking method significantly influence the mechanical performance of CFRP adhesive joints. The Scarf Joint configuration provided a more uniform stress distribution and exhibited superior performance compared with the Single Lap Joint configuration. The use of the modified copper interlayer enhanced the anchoring effect between the adhesive and the CFRP surface, thereby improving load transfer across the bonded interface. The best performance was achieved by the SJ-AIT configuration, which exhibited an average shear stress of 14.79 MPa, a strain of 2.35%, and an elastic modulus of 1714.54 MPa. These findings demonstrate that the combination of the Scarf Joint geometry and bio-inspired mechanical interlocking using a modified copper interlayer is an effective approach for improving the strength and reliability of CFRP adhesive joints and has strong potential as an alternative joint design for composite structural applications. Keywords: CFRP, adhesive bonding, copper interlayer, mechanical interlocking, single lap joint, scarf joint, shear test.

Item Type:	Thesis (Sarjana)
Additional Information:	1). Dr. Himawan Hadi Sutrisno, S.T., M.T. 2). Dr. Siska Titik Dwiyati, S.T., M.T.
Subjects:	Teknologi dan Ilmu Terapan > Teknik Mesin, Mekanika Teknik Teknologi dan Ilmu Terapan > Manufaktur
Divisions:	FT > S1 Rekayasa Keselamatan Kebakaran
Depositing User:	SHIFA RAHMA MARITZA .
Date Deposited:	27 Jul 2026 03:40
Last Modified:	27 Jul 2026 03:40
URI:	http://repository.unj.ac.id/id/eprint/67039

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