Daudy, Kevinaura Rachman (2025) Prediksi Lifetime Lambung Kapal Fiberglass Reinforced Plastic (FRP) Menggunakan Dynamic Mechanical Analyzer (DMA) Dan Metode Elemen Hingga. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Material Fiberglass Reinforced Plastic (FRP) banyak digunakan pada konstruksi kapal karena keunggulannya dalam rasio kekuatan terhadap berat, ketahanan korosi, dan kemudahan fabrikasi. Namun, prediksi umur struktur (lifetime) lambung kapal FRP masih menjadi tantangan,terutama di lingkungan tropis dengan temperatur tinggi dan kelembapan ekstrem. Penelitian ini bertujuan memperkirakan umur struktur kapal FRP melalui kombinasi pengujian Dynamic Mechanical Analyzer (DMA) dan simulasi numerik berbasis Finite Element Method (FEM). Pengujian DMA dilakukan pada spesimen hasil fabrikasi lokal untuk memperoleh karakteristik viskoelastik material, yang kemudian digunakan membangun kurva S N material spesifik sebagai input dalam analisis statik struktur menggunakan Ansys Static Structural. Hasil studi menunjukkan bahwa peningkatan beban statik menurunkan umur struktur kapal. Pada kondisi beban tertinggi (Over load condition), tegangan maksimum mencapai 107,39 MPa dengan umur 12,29 tahun,sedangkan kondisi kosong mencapai 30 tahun. Seluruh hasil masih berada dalam rentang aman umur desain sesuai pedoman DNVGL-CG-0129. Pendekatan DMA FEM terbukti efektif dan konservatif untuk memperkirakan umur struktur kapal FRP di lingkungan tropis.
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Fiberglass Reinforced Plastic (FRP) has been widely applied in ship construction due to its excellent strength-to-weight ratio, corrosion resistance, and ease of fabrication. However, predicting the structural lifetime of FRP hulls remains a challenge, particularly under tropical environmental conditions characterized by high temperatures and humidity. This study aims to estimate the lifetime of an FRP ship hull through a combined approach using Dynamic Mechanical Analyzer (DMA) testing and Finite Element Method (FEM) simulation. The DMA test was performed on locally fabricated FRP specimens to determine the viscoelastic behavior of the material, which was then used to develop a material-specific S N curve. The curve was integrated into Ansys Static Structural analysis to predict the structural response under various static loading conditions. The results indicate that increasing static load significantly reduces the structural lifetime. Under the highest load condition (150%), the maximum stress reached 107,39 MPa with a predicted life of 12,29 years, while the lightship condition yielded 30 years. All results fall within the safe design life range according to DNVGL-CG-0129. The DMA FEM approach provides a reliable and conservative estimation of FRP structural performance under tropical operational conditions.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Fiberglass Reinforced Plastic (FRP), Dynamic Mechanical Analyzer (DMA), lifetime, kelelahan material, temperatur, Fiberglass Reinforced Plastic (FRP), Dynamic Mechanical Analyzer (DMA), lifetime, material fatigue, temperature. |
| Subjects: | Q Science > QC Physics > QC173.4.C63 Composite materials Q Science > QD Chemistry > QD79.T38 Thermal analysis T Technology > TA Engineering (General). Civil engineering (General) > TA169.5 Failure analysis T Technology > TA Engineering (General). Civil engineering (General) > TA418.38 Materials--Fatigue. V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM163 Hulls (Naval architecture) |
| Divisions: | Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36101-(S2) Master Thesis |
| Depositing User: | Kevinaura Rachman Daudy |
| Date Deposited: | 20 Feb 2026 00:46 |
| Last Modified: | 20 Feb 2026 00:46 |
| URI: | http://repository.its.ac.id/id/eprint/132474 |
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