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Maulana, Fauzan
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Humanities Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Education Engineering Environmental Science Immunology & microbiology Social Sciences

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Perbandingan Kekuatan Bending Material Komposit Penguat Carbon Fiber Dengan Hasil Metode Pembuatan Vacuum Infusion Dan Manual Hand Lay-Up Maulana, Fauzan; Fernandez, Donny; Maksum, Hasan; Setiawan, M. Yasep
MSI Transaction on Education Vol 5 No 4 (2024): MSI Transaction on Education
Publisher : Minangkabau Scholar Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/mted.v5i4.167

Abstract

Material komposit peguat carbon fiber merupakan material penganti logam dan baja menjadi body part carbon fiber yang dapat mereduksi berat kendaraan supaya meningkatkan efesiensi bahan bakar. Tujuan penelitian untuk mengetahui kekuatan bending komposit carbon fiber dengan hasil metode pembuatan vacuum infusion dan manual hand lay-up. Teknik pengujian dengan three point bending. Hasil penelitian dari metode vacuum infusion menghasilkan spesimen dengan kekuatan maksimum 11.460 N, modulus elastisitas 803.185 N/mm dan bending strength 23.581 N/mm. Metode manual hand lay-up menghasilkan kekuatan maksimum 19.442 N, modulus elastisitas 1128.394 N/mm dan bending strength 23.806 N/mm. Jika mementingkan kekuatan dan ekonomis disarankan menggunakan metode manual hand lay-up, kelenturan dan keringanan disarankan metode vacuum infusion. Carbon fiber-reinforced composite material is an alternative to metal and steel for vehicle body parts, designed to reduce vehicle weight and improve fuel efficiency. This study aims to evaluate the bending strength of carbon fiber composites produced using vacuum infusion and manual hand lay-up methods. The testing technique used was three-point bending. The results show that the vacuum infusion method produced specimens with a maximum strength of 11,460 N, an elasticity modulus of 803.185 N/mm, and a bending strength of 23.581 N/mm. The manual hand lay-up method produced a maximum strength of 19,442 N, an elasticity modulus of 1,128.394 N/mm, and a bending strength of 23.806 N/mm. If prioritizing strength and cost-effectiveness, the manual hand lay-up method is recommended. For flexibility and lighter weight, the vacuum infusion method is preferable.
IDENTIFICATION AND TAXONOMIC ANALYSIS OF VARIOUS INSECTS IN THE WONOREJO MANGROVE TOURISM AREA IN SURABAYA Maulana, Fauzan
Journal of Natural Sciences and Learning Vol. 4 No. 1 (2025): Journal of Natural Science and Learning
Publisher : Department of Biology Education, Faculty of Teacher Training and Education, Universitas Wijaya Kusuma Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30742/872sjv89/jnsl.v4i1.483

Abstract

The Wonorejo Surabaya Mangrove Tourism Area, one of the largest mangrove ecosystems in East Java, significantly contributes to biodiversity, particularly insect communities. This study aims to identify and analyse the taxonomy of various insect species inhabiting the region. A three-week field study was conducted in December 2024 using the sweep net method. Taxonomic analysis employed Linnaeus’ classification, while species identification relied on identification keys and relevant literature. The study revealed 15 insect species, including Pantala flavescens, Acisoma panorpoides, Danaus chrypsippus, Junonia orithya, Balenois aurota, Appias olferna, Junonia coenia, Catopsilia pyranthe, Eurema blanda, Catopsilia pamona, Xylocopa latipes, Papilio demodocus, Junonia almana, Hypolimnas bolina, and Vespa affinis. These species span three orders (Odonata, Lepidoptera, Hymenoptera), six families (Libellulidae, Nymphalidae, Pieridae, Apidae, Papilionidae, Vespidae), and 12 genera  (Pantala, Acisoma, Danaus, Junonia, Balenois, Appias, Catopsilia, Eurema, Xylocopa, Papilio, Hypolimnas, Vespa). This study highlights exceptional biodiversity and significant genetic potential for mangrove habitat conservation. These findings are crucial for regional management and conservation, including habitat protection and environmental education. Further research is necessary to understand insect ecological roles and develop effective conservation strategies for maintaining the health of Wonorejo’s mangrove ecosystem.
Co-Authors Donny Fernandez Hasan Maksum M. Yasep Setiawan