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All Journal Jurnal Rekayasa Material, Manufaktur & Energi International Journal of Applied Mathematics, Sciences, and Technology for National Defense
Wulandari, Viviq Ardita
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Aerospace Engineering Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Mathematics Physics

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Analysis of submerged breakwater models using ripple tank Mutmainnah, Mutmainnah; Wulandari, Viviq Ardita; Argus, Roman; Atmadi, Atmadi; Pratiwi, Raditya Faradina; Imastuti, Imatuti
International Journal of Applied Mathematics, Sciences, and Technology for National Defense Vol 1, No 2 (2023): International Journal of Applied Mathematics, Sciences, and Technology for Natio
Publisher : FoundAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/app.sci.def.v1i2.222

Abstract

A breakwater is an infrastructure that functions to dampen wave energy. To secure the area directly adjacent to the coast, an effective breakwater model is needed based on the analysis of the dissipation coefficient value ( ). This study aims to determine a good breaker model based on the  value using a ripple tank. The data analyzed were wave heights before and after passing through the breakwaters of the three concrete models whose arrangement was varied. The results showed that the breaker model that is effective in reducing wave energy is the Grooved cube model with holes arranged horizontally based on the resulting small reflection coefficient ( ) and transmission coefficient ( ) values and large  values
Development Composite Metal-Ceramic Hybrids and Polymer Foam Composites Reinforced TKKS Fiber with Variations Al2O3 Concentration for Enhancement Mobility and Protection Armored Vehicle Wulandari, Viviq Ardita; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.22652

Abstract

Armored vehicles require materials that can provide high protection from ballistic and explosive threats, and have a light weight to increase mobility. This study aims to develop metal-ceramic hybrid composites and polymer foam composites reinforced with OPEFB (Oil Palm Empty Fruit Bunches) fibers with varying concentrations of Al2O3 ( Aluminum Oxide). This combination was tested to assess mechanical strength, ballistic resistance, and energy absorption capabilities from impacts and shock waves. The results showed that the composite using a 10% Al2O3 concentration variation provided the best balance between strength and light weight. The use of these two types of composites is expected to increase the mobility and protection of armored vehicles.
Co-Authors Argus, Roman Aritonang, Sovian Atmadi, Atmadi Imastuti, Imatuti Mutmainnah Mutmainnah Pratiwi, Raditya Faradina