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All Journal Turbo : Jurnal Program Studi Teknik Mesin International Journal of Marine Engineering Innovation and Research Jurnal Teknik Ilmu dan Aplikasi PROCEEDINGS CONFERENCE ON DESIGN AND MANUFACTURE AND ITS APPLICATION
Amanda Rosalina
Politeknik Perkapalan Negeri Surabaya
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Analysis of Fly Ash and Sandblasting Waste Addition in Cementitious Composite Lawn Table Reinforced by Cocofiber and Wiremesh Widya Emilia Primaningtyas; Inshiro Auliyasari; Wiwik Dwi Pratiwi; Adristi Nisazarifa; Desrilia Nursyifaulkhair; Amanda Rosalina
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 4 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i4.4836

Abstract

Concrete technology has significantly advanced and remains an interesting research topic. The demand for cement usage rises significantly due to concrete usage in various sectors. Cement production leads to air pollution issues and causes a greenhouse effect, even in the modern filtration era. Fly ash is an industrial waste that has been identified as a viable substitute for cement due to its pozzolanic properties. Silica Sand is sandblasting waste, where added value is needed. This study investigates the effectiveness of fly ash substitution in the cement portion of cementitious composite materials as an effort to minimize cement usage. Using sandblasting waste is an effort to implement 3R activity (reduce, reuse, recycle) for maritime waste. Compressive and tensile tests were evaluated in the variation of fly ash substitution for cementitious composite reinforced by coco fiber and wiremesh model. The results show that a 40% fly ash substitution gives the highest compressive strength of 32.98 MPa and the tensile strength of 5.90 N/mm². The best model composition provides the increments of compressive and tensile strength compared to the control specimen at 43.60% and 12.60%, respectively. ANOVA tests confirmed the significance of the enhancing effect as the presence of fly ash, both for compressive and tensile strength. Additionally, static analysis simulations using Fusion360 software were performed and indicated that the cementitious composite lawn table prototype’s design is safe and has good formability, as a safety factor performed 2.26, exceeding the required value of 2.00. This result explicates that fly ash and waste materials can be effectively used in cementitious composites for practical applications.
Studi Simulasi Panas pada Pelat Tipis dengan Model Persamaan Diferensial Parsial Ridhani Anita Fajardini; Amanda Rosalina; Adristi Nisazarifa; Desrilia Nursyifaulkhair
Jurnal Teknik Ilmu dan Aplikasi Vol. 7 No. 02 (2026): Jurnal Teknik Ilmu dan Aplikasi
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jtia.v7i02.7987

Abstract

Studi ini membahas simulasi distribusi temperatur pada pelat tipis dua dimensi dalam kondisi tunak (steady state) menggunakan pendekatan numerik berbasis persamaan diferensial parsial (PDE). studi ini bersifat numerik dan tidak berbasis pada eksperimen, melainkan menggunakan bentuk pelat persegi sebagai studi kasus yang representatif. Permasalahan ini dimodelkan menggunakan persamaan diferensial parsial jenis elliptic equation, khususnya persamaan Laplace, yang menyatakan distribusi temperatur pada pelat. Penyelesaian dilakukan secara numerik dengan pendekatan second-order central difference scheme. Untuk mengevaluasi keefektifan pendekatan ini, dilakukan simulasi pada beberapa variasi ukuran grid (step size) yang berbeda. Hasil menunjukkan bahwa penyusutan ukuran step size memberikan pola distribusi temperatur yang lebih detail, namun terjadi peningkatan jumlah titik diskritisasi dan beban komputasi. Penelitian ini menunjukkan bahwa metode beda hingga (FDM) dapat menjadi metode yang efisien dan fleksibel dalam menganalisis fenomena konduksi panas dua dimensi, terutama pada kondisi batas tertentu.
DESIGN OF A SANDBLASTING WASTE SIEVE MACHINE (CASE STUDY OF SHIPYARD) Rizal Indrawan; Alfarell Akbar Pradhana Utomo; Ridhani Anita Fajardini; Fipka Bisono; Tri Andi Setiawan; Dhika Aditya Purnomo; Amanda Rosalina; Widya Emilia Primaningtyas
TURBO [Tulisan Riset Berbasis Online] Vol 14 No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4559

Abstract

At the shipyard, the sandblasting process is routinely carried out to clean material surfaces from rust and other contaminants. This process produces waste in the form of used sand mixed with metal fragments and other debris, requiring separation before the waste can be reused as a concrete mixture. Currently, the separation process is still performed manually, which is considered inefficient due to the large volume of waste, averaging 42 tons per day. To address this issue, the author designed a sandblasting waste sieving machine to make the separation process more automatic and effective. The structural design and strength analysis were carried out using Autodesk Fusion 360 software. The simulation results of the selected design concept showed a minimum safety factor of 6.51, a maximum von Mises stress of 38.134 MPa on the main frame, and a maximum displacement of 0.186 mm on the sieve holder. The design has an estimated total manufacturing cost of Rp4.244.000,-.  
SIMULASI PARAMETER PROSES PENGECORAN LOGAM INVESTMENT CASTING UNTUK MEMINIMALKAN POROSITAS PADA CASING PUMP Sahat Maruba Simbolon; Fipka Bisono; Amanda Rosalina
Proceedings Conference On Design Manufacture Engineering And Its Application Vol. 9 No. 1 (2025): 9th Proceedings of Conference on Design Manufacture Engineering and its Applica
Publisher : Proceedings Conference On Design Manufacture Engineering And Its Application

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cdma.v9i1.3742

Abstract

Pengecoran logam berperan strategis dalam memenuhi kebutuhan komponen pada berbagai sektor industri, seperti otomotif, konstruksi, energi, hingga alat berat. Proses ini memiliki keunggulan dalam menghasilkan bentuk produk yang kompleks, presisi tinggi, serta kekuatan material yang baik dengan biaya produksi yang relatif ekonomis. Meski demikian, salah satu permasalahan utama yang masih sering ditemui adalah munculnya cacat porositas. Cacat ini tidak hanya menurunkan kualitas visual, tetapi juga berdampak signifikan terhadap kekuatan mekanis, ketahanan terhadap tekanan, serta keandalan produk dalam jangka panjang. Casing pump, sebagai komponen vital dalam sistem perpompaan, sering mengalami porositas akibat parameter pengecoran yang belum diatur secara optimal. Kondisi ini berakibat pada meningkatnya tingkat reject produk, pemborosan material, serta berkurangnya efisiensi produksi. Penelitian ini bertujuan untuk mengidentifikasi penyebab utama timbulnya porositas pada produk casing pump sekaligus mengoptimalkan parameter proses pengecoran yang meliputi suhu peleburan, suhu penuangan, suhu cetakan keramik, serta laju waktu tuang. Simulasi dilakukan menggunakan perangkat lunak ProCAST, yaitu Computer Aided Engineering (CAE) berbasis simulasi yang mampu memvisualisasikan aliran logam cair, menganalisis mekanisme pembekuan, serta memprediksi titik kritis terjadinya porositas. Melalui pendekatan berbasis simulasi dan validasi, diharapkan dapat diperoleh kombinasi parameter proses yang lebih akurat sehingga tingkat porositas dapat ditekan, kualitas produk meningkat, serta efisiensi produksi tercapai. Selain itu, hasil penelitian ini diharapkan menjadi referensi ilmiah yang mendukung pengembangan proses manufaktur pengecoran logam yang lebih efisien, ekonomis, berdaya saing, dan ramah lingkungan.
Co-Authors Adristi Nisazarifa Alfarell Akbar Pradhana Utomo Desrilia Nursyifaulkhair Dhika Aditya Purnomo Fipka Bisono Inshiro Auliyasari Primaningtyas, Widya Emilia Ridhani Anita Fajardini Rizal Indrawan Sahat Maruba Simbolon Tri Andi Setiawan Wiwik Dwi Pratiwi