Pengaruh Ketebalan Perekat Epoksi – Aerosil Terhadap Kekuatan Sambungan Single Lap Joint Dan T-Peel Dengan Pemodelan Cohesive Element

Giyantoro, Dandi Akbar (2026) Pengaruh Ketebalan Perekat Epoksi – Aerosil Terhadap Kekuatan Sambungan Single Lap Joint Dan T-Peel Dengan Pemodelan Cohesive Element. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Teknologi sambungan adhesive menjadi solusi dalam industri otomotif dimana dapat menggantikan metode penyambungan konvensional. Penggunaan perekat mampu mendistribusikan tegangan lebih merata, memiliki massa yang ringan, serta memungkinkan penggabungan atau penyambungan dengan material yang berbeda (Dissimilar Materials) tanpa merusak material tersebut. Namun, performa sambungan dipengaruhi oleh ketebalan perekat, komposisi perekat, dan jenis pembebanan yang diberikan. Pada penelitian ini, menggunakan perekat Epoxy – Aerosil dengan komposisi 30%, 40%, dan 50% dengan variasi ketebalan perekat 0.1 – 0.5 mm. Peneliti ini dilakukan secara numerik menggunakan metode Finite Element Method (FEM) dengan software LS – DYNA. Konfigurasi sambungan yang dianalisis adalah Single Lap Joint (SLJ) dan T-Peel dan lapisan adhesive dimodelkan menggunakan Cohesive Element dengan pendekatan Cohesive Zone Model (CZM). Hasil simulasi menunjukkan bahwa ketebalan perekat dan komposisi Aerosil dapat memengaruhi kekuatan sambungan. Pada Single Lap Joint, ketebalan optimal untuk komposisi 30% diperoleh pada ketebalan 0.1 mm dengan Pak Force 870.15 N. Pada variasi 40%, ketebalan optimal diperoleh pada ketebalan 0,1 mm dengan Peak Force 853,27 N. Sementara itu, pada variasi 50%, ketebalan optimal diperoleh pada ketebalan 0,4 mm dengan Peak Force 2611,25 N. Pada sambungan T-Peel, ketebalan optimal untuk variasi 30% diperoleh pada ketebalan 0,1 mm dengan Peak Force sebesar 798,23 N. Pada variasi 40%, ketebalan optimal diperoleh pada ketebalan 0,3 mm dengan Peak Force sebesar 180,88 N. Sedangkan pada variasi 50%, ketebalan optimal diperoleh pada ketebalan 0,1 mm dengan Peak Force sebesar 321,02 N. Berdasarkan hasil tersebut, ketebalan yang lebih tebal tidak selalu memberikan kekuatan sambungan yang tinggi pua. Hal ini disebabkan oleh perubahan kekakuan, deformasi lapisan adhesive, serta distribusi tegangan pada daerah sambungan. Kombinasi yang terbaik pada sambungan Single Lap Joint diperoleh pada komposisi 50% dengan ketebalan 0.4 mm, sedangkan pada sambungan T-Peel pada komposisi 30% dengan ketebalan 0.1 mm. Respons kegagalan numerik pada kedua sambungan ditunjukkan oleh penurunan gaya setelah Peak Force yang merepresentasikkan terjadiya Damage Evolution pada Cohesive Element.
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Adhesive joint technology is a solution in the automotive industry, replacing conventional jointing methods. The use of adhesives distributes stress more evenly, has a lightweight mass, and allows for the joining or joining of dissimilar materials without damaging them. However, performance is influenced by adhesive thickness, adhesive composition, and the type of applied load. In this study, Epoxy-Aerosil adhesive was used in compositions of 30%, 40%, and 50% with adhesive thickness variations of 0.1–0.5 mm.This research was conducted numerically using the Finite Element Method (FEM) with LS-DYNA software. The joint configurations described were Single Lap Joint (SLJ) and T-Peel, and the adhesive layer was modeled using a Cohesive Element model with a Cohesive Zone Model (CZM) approach. The cohesive model was used to represent the adhesive failure response. Simulation results indicate that adhesive thickness and Aerosil composition can influence joint strength. For the Single Lap Joint, the optimal thickness for the 30% composition was 0.1 mm with a peak force of 870.15 N. For the 40% variation, the optimal thickness was 0.1 mm with a peak force of 853.27 N. Meanwhile, for the 50% variation, the optimal thickness was 0.4 mm with a peak force of 2611.25 N. For the T-Peel joint, the optimal thickness for the 30% variation was 0.1 mm with a peak force of 798.23 N. For the 40% variation, the optimal thickness was 0.3 mm with a peak force of 180.88 N. Meanwhile, for the 50% variation, the optimal thickness was 0.1 mm with a peak force of 321.02 N. Based on these results, a thicker thickness does not always provide high joint strength. This is caused by changes in stiffness, the solidification of the adhesive layer, and stress distribution in the joint area. The best combination for the Single Lap Joint was obtained at 50% adhesive composition with a thickness of 0.4 mm, while for the T-Peel joint at 30% adhesive composition with a thickness of 0.1 mm. The numerical failure response for both applications is expressed by a decrease in force after the Peak Force, which represents the occurrence of Damage Evolution in the Cohesive Element.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Single Lap Joint (SLJ), T-Peel, Epoxy – Aerosil, Finite Element Method (FEM), Epoxy – Aerosil, Cohesive Element, Ketebalan Perekat, Force– Displacement, dan Peak Force ,Single Lap Joint (SLJ), T-Peel, Epoxy – Aerosil, Finite Element Method (FEM), Epoxy – Aerosil, Cohesive Element, Adhesive Thickness, Force – Displacement, and Peak Force
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA169.5 Failure analysis T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA433 Strength of materials. T Technology > TA Engineering (General). Civil engineering (General) > TA455.A34 Adhesives
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	DANDI AKBAR GIYANTORO
Date Deposited:	08 Jul 2026 08:29
Last Modified:	08 Jul 2026 08:29
URI:	http://repository.its.ac.id/id/eprint/134469

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