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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 Physical Sciences, Life Science and Engineering Journal Of Engineering Sciences (Improsci) IJHCS Journal of Aerospace Systems and Engineering Innovations Academia Open Abdimas Pedagogi: Jurnal Ilmiah Pengabdian kepada Masyarakat
Prantasi Harmi Tjahjanti
Program Studi Teknik Mesin, Universitas Muhammadiyah Sidoarjo
Aerospace Engineering Humanities Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Public Health Social Sciences Transportation Other

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Electric Wheelchair Manufacturing Analysis For Physical Disabilities Reviewed from the Aspect of Ergonomics Harmi Tjahjanti, Prantasi Harmi Tjahjanti; Mulyadi; Iswanto; Artha Gumelar, Buyung; Rudyansyah Christie, Rakhmad; Prastio, Anggit; Mustakim, Annas
Jurnal Improsci Vol 2 No 1 (2024): Vol 2 No 1 August 2024
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i1.429

Abstract

The high rate of physical disability is a trigger and spur in the development of research/research for people with disabilities to help with their daily activities, one of which is with a wheelchair. There is a sense of concern to see manual wheelchairs used daily by people with physical disabilities, especially with their abnormal hands and feet, so it becomes a problem in itself because they are quite tricky and tired of pedaling a manual wheelchair. This condition impacts their work productivity, thereby reducing their income/economy. Therefore, the purpose of this research is to manufacture electric wheelchairs belonging to two people with physical disabilities (i.e., belonging to Bagus and Huda). The ergonomics tests are carried out, including (a) Compatibility of the anthropometry of the user's body and the dimensions of the wheelchair, (b) Results of the user's postural analysis with RULA (Rapid Upper Limb Assessment) (c) Conformity of the dimensions of the wheelchair with the standard, and (d) Evaluation of the usability of the wheelchair based on observation. The results obtained for the Bagus electric wheelchair are from the anthropometric side. The popliteal height is longer than the distance between the seat and the footrest in the wheelchair. For Bagus to be more comfortable in using his wheelchair and for his legs not to be crooked (which will potentially cause more excellent musculoskeletal disorders), it is recommended that the distance between the seat and the footrest be extended. As for Huda electric wheelchairs, in general, they have been modified to adjust to the needs and conditions of Huda's body and make the design of Huda wheelchairs more ergonomic. However, the postural analysis showed that the forearm position was raised, and the hand was twisted when Huda operated the electric wheelchair controller. It is, therefore, recommended to lower the position of the controller in line with the wheelchair mount.
Core Material Manufacturing Study On Aluminum Composite Panel (ACP) Harmi Tjahjanti, Prantasi Harmi Tjahjanti; Fahruddin, A'rasy; Mulyadi, Mulyadi; Hardy Sujiatanti, Septia; Eryandrie Wicaksono, Majdi; Bamban Jakaria, Ribangun
Jurnal Improsci Vol 2 No 3 (2024): Vol 2 No 3 December 2024
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i3.579

Abstract

An aluminum composite panel (ACP) is a flat panel with aluminum plates/sheets that are rigid and strong but relatively lightweight. Between the two plates, the core material content is generally made of polyethylene and polyurethane. However, the two core materials are not resistant to high temperatures/heat. They are flammable, so it is urgent to make variations of other core materials resistant to high temperatures. This study aims to provide variations for ACP core materials using polymer materials resistant to high temperatures, namely Low-Density polyethylene (LDPE) and Polyoxymethylene (POM). The method used is experimental/fabrication of ACP making. The high-temperature test was carried out in a furnace with a temperature of 3000C, 3500C, and 4000C, each with a holding time of 1 hour. The results obtained from observing the microstructure using an Optical Microscope before and after the test damaged the core material while the Aluminum metal was still intact. The mass of ACP before and after testing also changed. Overall, at the three temperatures above, the LDPE core material does not withstand this temperature because the temperature is above the melting point of the LDPE material.
Air Circulation Improvement through Exhaust and Fan Installation: Peningkatan Sirkulasi Udara Melalui Pemasangan Exhaust dan Kipas Fawwaz , Muhammad Rafly; Tjahjanti, Prantasi Harmi
Procedia of Engineering and Life Science Vol. 8 No. 1 (2025): Proceedings of the 8th Seminar Nasional Sains 2025
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v8i1.1808

Abstract

Technological advances in the transportation sector are currently increasing rapidly, especially in this advanced era. Indonesia has a human population of 273.5 million. It is not surprising that Indonesia is the 15th largest country in the world. There are several options for air circulation in a room, depending on what kind of room you are in. The spaces in the building have a connection between spaces which is called circulation. Circulation is also a movement path which can be said to be a thread or rope which has the aim of connecting spaces within a building and also connecting indoor and outdoor spaces. Circulation also becomes a place for someone to feel a space through that person's origin and destination. In a building, circulation is a positive element that can influence a person's perception of the shape and space in the building.
Pembuatan dan Analisa Kontrol Otomatis Peralatan Cuci dan Pengering Tangan Wicaksono, Alfiansyah; 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.v1i1.4950

Abstract

Hasil dari pembuatan dan pengujian peralatan pencuci dan pengering tangan merupakan perubahan dan peningkatan teknologi yang bermanfaat dikehidupan sehari-hari dan bahkan dapat mengurangi penyebaran atau penularan virus. Dalam menggunakan peralatan pencuci tangan dan pengering tangan ini sudah tidak perlu lagi untuk memegang /menekan/memencet peralatan tersebut, hanya perlu mendekatkan tangan ke peralatan tersebut kita sudah dapat membersihkan tangan dengan waktu yang dibutuhkan juga cukup singkat dan juga lebih praktis.
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.
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
Co-Authors A'rasy Fahruddin Abdi Chandra Putra Achmad Febriyan Ikhsanudin Adi Prastyo Utomo Agus Hermawanto Ajitiyo Dananjoyo Al Amien, Mochammad Sandi Alfan Dabbar Muqaffi Alfiansyah Satrio Wicaksono Ali Akbar Ali Akbar Annisa Syakina Anom Isti , As’ad Arif Nurudin Artha Gumelar, Buyung Arwiyono, Wiky Anjaya Ayeik Abimanyu Bachtiar, Rifky Umar Bagas Ariya Dipangga Candra Darmawan, Candra Catur Ahadi, Yeyen Chilmi, Muchammad Darminto Darminto Dhani Indra Prakoso Dimas Hardiyanto Dimas Mahendra Wahyu Pratama Edi Widodo Edi Widodo, Edi Efendi, Moch Miqdar Eko Panunggal Eko Wahyono Setyawan Ernanda, Rico Ryan Eryandrie Wicaksono, Majdi Fajar Syahril Kirom Faris Abdullah Fawwaz , Muhammad Rafly Febriyan Ikhsanudin, Achmad Fernanda, Rexy Eca Fuad Hamzah Garida, Alzan Laga Gumelar, Buyung Hamzah, Fuad Hardy Sujiatanti, Septia Haris Suprastiyo Henry Vian Ivanda Ikhsanudin, Achmad Febriyan Iqbal Hadliri iswanto Iswanto -, Iswanto Iswanto . Iswanto Iswanto Iswanto Iswanto Ivanda, Henry Vian Izza Anshory Kristanto, Arnes Budi M. Ganu Hersandi Metatia Intan Mauliana Moch Arif Hidayatulloh Mochammad Sandi Al Amien Mochammad Soliqudin Mohamad Affan Rahmadin Mohammad Afif Fajar Mohammad Dani Iswanto Muchamad Dicky Sobirin, Muchamad Dicky Sobirin Muhammad Amin Putro MULYADI Mulyadi . Mulyadi Mulyadi Mulyadi Mulyadi Mustakim, Annas Mustofa, Wahyu Ali Nurmughni Zulham Amri Payana, Avit Dwi Prasetiyo, Abdul Aziz Prastio, Anggit Rachmadani, Dhaniar Gumelang Rachmat Firdaus Rahmananto, Satrio Fajar Restu Agung Istighfarin Rexy Eca Fernanda Ribangun Bamban Jakaria Rico Ryan Ernanda Riki Nanda Setyo Rizal Syamharis Rizki Ardi Arrahman Rizky Dwi Aldiantofas Rudyansyah Christie, Rakhmad Rudyansyah Kristiadi, Rakhmad Ryan Ernanda, Rico Saiful Bahri Sarifudin, Mohamad Satrio Wicaksono, Alfiansyah Septian Firmansyah Septy Annas Zamroni Setyawan, Anton Setyo, Nugroho Taufik Afandi Tri Cahyono Waluyo, Satrio Wibowo Harso Nugroho Wicaksono, Alfiansyah Wijaya Kelana Nur Soleh Wijaya Kelana Nur Soleh Wiwik Sumarmi Zyahdo Nikri Jofalo