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All Journal Jurnal Teknik Mesin Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin R.E.M (Rekyasa Energi Manufaktur) Jurnal Turbo : Jurnal Program Studi Teknik Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Justek : Jurnal Sains Dan Teknologi MITRA: Jurnal Pemberdayaan Masyarakat Community Development Journal Otopro Indonesian Journal of Cultural and Community Development JTTM: Jurnal Terapan Teknik Mesin Jurnal Mesin Nusantara Jurnal Abdimas ADPI Sains dan Teknologi Indonesian Journal of Innovation Studies PELS (Procedia of Engineering and Life Science) Procedia of Social Sciences and Humanities Innovative Technologica: Methodical Research Journal JTTT Journal Of Engineering Sciences (Improsci) IJHCS Journal of Aerospace Systems and Engineering Innovations Academia Open
Prantasi Harmi Tjahjanti
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Analisa Rancangan Hasil Kursi Roda Elektrik Lipat dan Non Lipat Gumelar, Buyung; Tjahjanti, Prantasi
Journal of Aerospace Systems and Engineering Innovations Vol. 1 No. 1 (2025): October
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/jasei.v1i1.4952

Abstract

Kursi roda merupakan peralatan yang berfungsi untuk pasien yang kesulitan berjalan karena yang disebabkan karena sakit, cacat atau cedera. Beberapa seseorang peneliti telah menggunakan teknologi yang awalnya dikembangkan untuk robot bergerak untuk menciptakan kursi roda cerdas, yang mengurangi tuntutan fisik, penglihatan, dan keterampilan yang diperlukan untuk mengoperasikan kursi roda. Kursi roda pintar dirancang untuk memberikan kenyamanan bagi penggunanya. Karena semakin banyaknya desain kursi roda elektrik yang bergantung pada fungsional dan kenyamanan untuk seorang pengguna. Maka diperlukan adanya analisa pada kursi roda elektrik agar kita mengetahui kursi roda tersebut aman tidaknya digunakan, selain itu kita dapat mengetahui terkait kekuatan dari rancangan kursi roda elektrik tersebut.
Pemanfaatan Serat Pelepah Pisang Sebagai Bahan Penguat Komposit Kampas Rem Sepeda Motor Non-Asbestos Tjahjanti, Prantasi Harmi; Payana, Avit Dwi
Jurnal Mesin Nusantara Vol 8 No 2 (2025): Jurnal Mesin Nusantara
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jmn.v8i2.25240

Abstract

Penelitian ini mengkaji serat pelepah pisang sebagai bahan penguat alternatif yang tidak mengandung asbestos untuk kampas rem sepeda motor berbasis komposit. Untuk membuat kampas rem, komposisi serat pelepah pisang, serbuk aluminium, dan serbuk kuningan diubah dalam tiga variasi fraksi massa. Pengujian sifat mekanik dilakukan untuk mengetahui bagaimana perbedaan komposisi berdampak pada ketangguhan dan kekerasan material. Pengujian dilakukan dengan menggunakan uji impak Charpy dan uji kekerasan Durometer Shore D. Hasil penelitian menunjukkan bahwa saat fraksi serbuk aluminium dan kuningan meningkat, diikuti peningkatan nilai kekerasan, namun nilai impact strenght turun. Kekerasan tertinggi diperoleh dari spesimen yang terdiri dari 30% serbuk pelepah pisang, 35% serbuk aluminium, dan 35% serbuk kuningan, dengan nilai 74,5 Shore D. Spesimen yang terdiri dari 50% serbuk pelepah pisang, 25% serbuk aluminium, dan 25% serbuk kuningan memperoleh nilai impact tertinggi sebesar 2624,66 kJ/m2. Karena kekerasan tinggi tetapi nilai impact strength yang masih dalam batas aman, spesimen dengan kandungan serbuk logam lebih tinggi adalah yang paling cocok untuk digunakan sebagai kampas rem sepeda motor. Studi ini menunjukkan bahwa serat pelepah pisang dapat digunakan sebagai penguat komposit kampas rem yang ramah lingkungan.
Pengaruh Media Pendingin Pasca Pengelasan MAG terhadap Kekerasan dan Struktur Mikro Baja SPHC Kristanto, Arnes Budi; Tjahjanti, Prantasi Harmi; Widodo, Edi; Mauliana, Metatia Intan
Jurnal Mesin Nusantara Vol 8 No 2 (2025): Jurnal Mesin Nusantara
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jmn.v8i2.25241

Abstract

Tujuan penelitian ini adalah untuk melihat bagaimana media pendingin pasca pengelasan MAG mempengaruhi kekerasan dan struktur mikro baja SPHC (Plate Steel Hot Rolled Coiled). Pengelasan dilakukan menggunakan metode Metal Active Gas (MAG) dengan media pendingin air, oli, dan udara. Untuk menguji kekerasan, metode Rockwell skala B (HRB) digunakan. Di sisi lain, mikrostruktur diamati pada daerah weld metal, zona panas yang terpengaruh (HAZ), dan base metal. Hasil penelitian menunjukkan bahwa, jika dibandingkan dengan media pendingin oli dan udara, media pendingin air menghasilkan kekerasan tertinggi. Kekerasan diperoleh pada weld metal sebesar 74,99 HRB, area HAZ sebesar 90,12 HRB, dan base metal sebesar 81,39 HRB. Pengamatan mikrostruktur menunjukkan fraksi perlit tertinggi pada media pendingin air, sebesar 75% pada area HAZ dan 69% pada base metal, sementara fraksi ferit turun. Secara keseluruhan, perubahan sifat mekanik dan struktur mikro baja SPHC sangat dipengaruhi oleh variasi media pendingin dan lokasi daerah pengelasan.
Pengaruh Variasi Komposisi Serbuk Kulit Jagung, Kuningan, dan Aluminium terhadap Kekerasan dan Ketangguhan Komposit Kampas Rem Non-Asbes Tjahjanti, Prantasi Harmi; Widodo, Edi; Mauliana, Metatia Intan; Darmawan, Candra
Jurnal Mesin Nusantara Vol 8 No 2 (2025): Jurnal Mesin Nusantara
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jmn.v8i2.25242

Abstract

Kampas rem non-asbes diperlukan sebagai alternatif yang aman dan ramah lingkungan untuk menggantikan kampas rem berbahan asbes. Penelitian ini bertujuan menganalisis pengaruh variasi komposisi serbuk kulit jagung, serbuk kuningan, dan serbuk aluminium terhadap kekerasan dan ketangguhan komposit kampas rem. Tiga variasi komposisi disiapkan dengan perubahan fraksi serat kulit jagung sebesar 50%, 40%, dan 30%, sementara fraksi logam ditingkatkan secara proporsional. Pengujian meliputi uji kekerasan Shore D dan uji impak Charpy. Hasil menunjukkan bahwa peningkatan kandungan logam meningkatkan kekerasan komposit dari 62 menjadi 78 Shore D, sedangkan penurunan kandungan kulit jagung menurunkan energi impak dari 12,57 J menjadi 6,98 J. Komposisi 50% kulit jagung, 25% kuningan, dan 25% aluminium memberikan keseimbangan paling optimal antara kekerasan dan ketangguhan. Komposit ini dinilai potensial sebagai material kampas rem non-asbes yang aman dan memiliki performa mekanik memadai.
Analysis of The Design of Thickness Variations of Pressure Cooker Equipment Using A Strainer Muqaffi, Alfan Dabbar; Harmi Tjahjanti, Prantasi; Widodo, Edi
Jurnal Improsci Vol 3 No 3 (2025): Vol 3 No 3 December 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v3i3.1036

Abstract

Background. In micro, small, and medium enterprises (MSMEs) that make pressure milkfish, the majority still use manual pressure cookers, with the pressure showing that the milkfish is cracked, making it less attractive in terms of performance and appearance. Aims. Therefore, the purpose of this research is to design a presto milkfish pot equipped with a filter. The design uses AutoCAD for 2D drawings and SolidWorks software 2023 for 3D. The results obtained have been used to design pressure-cooker equipment with a filter. Methods. The results of the design of pressure cooker equipment using filters with varying pan thicknesses are for Von Mises stress, displacement (shift)/elongation, strain/strain, and Safety Factor (SF). Result. The analysis of all design results was obtained: (a). The results of the Von Mises stress simulation, with varying pressure cooker thickness, show that the wall thickness is directly proportional to the maximum Von Mises stress. So the wall of the pressure cooker with the greatest thickness (3mm) has the maximum voltage value of Von Mises, also the greatest (978.0 MPa), (b).  The results of the pressure cooker elongation/displacement simulation with varying pressure cooker thickness showed that thickness variation was not significant for elongation/displacement. The average elongation/displacement is 0.008468 mm; the result is quite small, indicating that the thickness of the pan is not related to the elongation of the pressure cooker material at a break or a certain limit (c). The results of the pressure cooker strain simulation with the pressure cooker thickness variation, with a value of 0.004613, indicate that the pressure cooker thickness variation is not significant to the pressure cooker strain, because the strain obtained does not cause a change in the shape of the pressure cooker equipment, even though the pressure cooker wall has a different thickness Conclusion. Safety Factor simulation results/ Factor of Safety (FS) pressure cookers with pressure cooker thickness variations it appears that for the pressure cooker thickness variation, all have an acceptable FS, because the value exceeds the value of 1.
Tensile and Compressive Behavior of Sansevieria Fiber Polyester Starch Composite: Perilaku Tarik dan Tekan Komposit Serat Sansevieria, Poliester, dan Tepung Garida, Alzan Laga; Tjahjanti, Prantasi Harmi
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2040

Abstract

General Background Composite materials reinforced with natural fibers are increasingly investigated for lightweight engineering applications. Specific Background Sansevieria fiber composites with polyester matrices have shown promising mechanical properties, yet the modification of the matrix using amylum starch remains insufficiently documented. Knowledge Gap Limited studies report how varying amylum starch concentrations alter tensile and compressive responses of alkali-treated Sansevieria fiber composites. Aims This study determines the mechanical characteristics of Sansevieria fiber reinforced polyester composites with 5% NaOH treatment and amylum starch additions of 6–10 wt% through standardized tensile and compressive tests. Results Hand lay-up specimens tested under ASTM D-638 and ASTM D-695 show that starch addition increases tensile strength, with a maximum stress of 35.53 MPa at 8%, while compressive strength decreases, with the highest value of 108.27 MPa observed in specimens without starch. Novelty The work provides direct experimental comparison of dual mechanical behaviors under systematic starch concentration variations in a natural fiber composite system. Implications The findings guide material selection and matrix formulation for applications requiring higher tensile performance while considering compressive limitations. Keywords: Sansevieria Fiber, Polyester Composite, Amylum Starch, Tensile Strength, Compressive Strength Key Findings Highlights Peak tensile stress recorded at eight percent starch addition Compression capacity reduced with matrix modification Alkali treated fibers maintained load transfer during stretching
Design of Solar Collector Prototype with Working Fluid Temperature and Pressure Measurement for Energy Harvesting : Rancang Bangun Prototipe Solar Kolektor dengan Pengukuran Temperatur dan Tekanan Fluida Kerja untuk Energy Harvesting A’rasy Fahruddin; Mochammad Sandi Al Amien; Prantasi Harmi Tjahjanti; Izza Anshory
Academia Open Vol. 8 No. 2 (2023): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/acopen.8.2023.7276

Abstract

Indonesia is a tropical country, which gets a lot of sunshine every year. Harvesting energy from solar heat is an alternative solution to obtain renewable and environmentally friendly electrical energy. The purpose of this research is to design and test the temperature and flow of the working fluid of a solar collector for energy harvesting. The method used is true experiment research by making a solar collector prototype. Measurement of the temperature and pressure of the working fluid is carried out by varying the power of the heating lamp as a substitute for sunlight in the test. The experimental results show that the greater the heat energy received by the solar collector, the higher the temperature of the working fluid and the resulting pressure during the same test. The highest temperature recorded for the liquid coming out of the solar collector reaches 63.6 oC with a maximum pressure difference of 19.6 Pascals. The results of this test will be followed by testing the flow rate of the working fluid to determine the power potential of the working fluid for harvesting energy. Highlights: Efficiency Enhancement: Optimizing solar collector design for increased heat energy absorption and efficient energy conversion. Temperature-Pressure Correlation: Investigating the relationship between heat energy, working fluid temperature, and pressure for better energy yield. Flow Rate Analysis: Assessing working fluid flow to gauge energy potential and inform effective energy harvesting strategies. Keywords: solar collector, temperature, fluid pressure, energy harvesting
TIG Welding Current Selection Based on Penetrant Test Results: Pemilihan Arus Las TIG Berdasarkan Hasil Uji Penetran Soliqudin, Mochammad; Tjahjanti, Prantasi Harmi
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2114

Abstract

General Background Welding plays a crucial role in metal joining processes across construction and manufacturing industries. Specific Background Tungsten Inert Gas welding is widely used for aluminum components such as motorcycle rims due to its precision and quality. Knowledge Gap However, determining the optimal welding current to minimize surface defects remains a challenge. Aims This study aims to analyze the effect of current variation on TIG welding results using liquid penetrant testing. Results The findings show that lower current produces fewer defects, while higher current increases the occurrence of surface defects such as cracks and porosity. The optimal welding parameter is identified at 100A, which yields the best joint quality. Novelty This study highlights the integration of current variation analysis with penetrant testing for aluminum rim welding evaluation. Implications The results provide practical guidance for selecting welding parameters and improving early defect detection in aluminum welding processes. Keywords: TIG Welding, Aluminum Rims, Welding Current, Penetrant Testing, Welding Defects Key Findings Highlights Lower amperage produces minimal surface discontinuities Higher heat input correlates with defect formation Inspection method supports early quality verification
TIG Welding Current Variation and Impact Strength of Aluminum Rims: Variasi Arus Pengelasan TIG dan Kekuatan Dampak Pelek Aluminium Pratama, Dimas Mahendra Wahyu; Tjahjanti, Prantasi Harmi
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2116

Abstract

General Background Welding is widely applied in construction and metal repair, requiring proper parameter selection to ensure joint quality. Specific Background TIG welding is commonly used for aluminum materials due to its precision and controlled heat input. Knowledge Gap However, limited studies focus on the relationship between welding current variation and impact strength in aluminum rims. Aims This study aims to analyze the effect of TIG welding current variations (70A, 80A, and 90A) on the impact strength of aluminum rim joints. Results The experimental results show that welding current significantly affects impact strength, with the highest value of 0.320 Joule/mm² obtained at 90A and the lowest value of 0.204 Joule/mm² at 80A. Higher current increases weld penetration and improves joint strength. Novelty This research provides specific experimental evidence on optimal current settings for aluminum rim welding using TIG. Implications The findings offer practical guidance for selecting welding parameters to achieve stronger and more reliable aluminum joints in industrial applications Keywords: Tig Welding, Aluminum Rims, Welding Current, Impact Strength, Charpy Tes Key Findings Highlights Highest toughness observed at maximum current setting Mid-level current produced the weakest joint performance Penetration depth correlates with mechanical resistance
Optimal Composition Ratio Achieves Maximum Compressive Strength in Sandwich Panels: Rasio Komposisi Optimal Menghasilkan Kekuatan Tekan Maksimal pada Panel Sandwich Hardiyanto, Dimas; Tjahjanti, Prantasi Harmi
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2125

Abstract

General Background: Sandwich panels are widely used in construction due to their lightweight structure and functional efficiency, making material strength a critical factor in performance. Specific Background: Defects such as bubbles and uneven surfaces in sandwich panels often reduce product quality and are related to bonding issues between layers. Knowledge Gap: Limited studies specifically examine how variations in polyol and isocyanate composition affect compressive strength in repaired sandwich panels. Aims: This study aims to analyze the effect of composition ratios of polyol and isocyanate on the compressive strength of sandwich panels. Results: Experimental testing shows that the 70:30 composition produces the highest compressive strength of 1.13 MPa, compared to 0.513 MPa for 50:50 and 0.696 MPa for 60:40. Novelty: The study provides experimental evidence of optimal composition ratio for improving bonding performance in sandwich panel repair. Implications: The findings offer a reference for selecting material composition to improve the strength and quality of sandwich panels in industrial applications. Keywords: Sandwich Panel, Polyurethane, Isocyanate, Compressive Strength, Material Composition Key Findings Highlights Highest strength achieved at specific material proportion Measured values vary significantly across tested ratios Experimental data confirm sensitivity to composition changes
Co-Authors A'rasy Fahruddin Abdi Chandra Putra Achmad Febriyan Ikhsanudin Adi Prastyo Utomo Agus Hermawanto Ajitiyo Dananjoyo Al Amien, Mochammad Sandi Alfiansyah Satrio Wicaksono Ali Akbar Ali Akbar Anom Isti , As’ad Arasy Fahruddin Arif Nurudin Artha Gumelar, Buyung Arwiyono, Wiky Anjaya Ayeik Abimanyu A’rasy Fahruddin Bachtiar, Rifky Umar Bagas Ariya Dipangga Candra Darmawan, Candra Catur Ahadi, Yeyen Chilmi, Muchammad Darminto Darminto Edi Widodo Edi Widodo, Edi Efendi, Moch Miqdar Eko Panunggal Eko Wahyono Setyawan Ernanda, Rico Ryan Fahruddin, A'rasy Fahruddin, A’rasy Fajar Syahril Kirom Faris Abdullah Fawwaz , Muhammad Rafly Febriyan Ikhsanudin, Achmad Fernanda, Rexy Eca Fuad Hamzah Garida, Alzan Laga Gumelar, Buyung Hamzah, Fuad Hardiyanto, Dimas Haris Suprastiyo Henry Vian Ivanda Ikhsanudin, Achmad Febriyan Iqbal Hadliri Iswanto -, Iswanto Iswanto . Iswanto Iswanto Iswanto Iswanto Ivanda, Henry Vian Izza Anshory Kristanto, Arnes Budi M. Ganu Hersandi Mauliana, Metatia Intan Moch Arif Hidayatulloh Mochammad Sandi Al Amien Mohammad Afif Fajar Mohammad Dani Iswanto Muhammad Amin Putro MULYADI Mulyadi . Mulyadi Mulyadi Muqaffi, Alfan Dabbar Mustakim, Annas Mustofa, Wahyu Ali Nurmughni Zulham Amri Payana, Avit Dwi Prasetiyo, Abdul Aziz Prastio, Anggit Pratama, Dimas Mahendra Wahyu Rachmadani, Dhaniar Gumelang Rachmat Firdaus Rahmananto, Satrio Fajar Rexy Eca Fernanda Ribangun Bamban Jakaria Rico Ryan Ernanda Rizki Ardi Arrahman Rudyansyah Kristiadi, Rakhmad Ryan Ernanda, Rico Saiful Bahri Sarifudin, Mohamad Satrio Wicaksono, Alfiansyah Septian Firmansyah Setyawan, Anton Soliqudin, Mochammad Taufik Afandi Tri Cahyono Waluyo, Satrio Wibowo Harso Nugroho Wicaksono, Alfiansyah Wijaya Kelana Nur Soleh Wijaya Kelana Nur Soleh Wiwik Sumarmi Zyahdo Nikri Jofalo