Article Per Year (5 Year)
p-Index From 2021 - 2026
3.859
P-Index
This Author published in this journals
All Journal J@TI (TEKNIK INDUSTRI) Jurnal Ilmiah Desain & Konstruksi Tengkawang : Jurnal Ilmu Kehutanan SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Machine : Jurnal Teknik Mesin PRODUCTUM : Jurnal Desain Produk (Pengetahuan dan Perancangan Produk) Jurnal Teknik Mesin Indonesia Infotekmesin Journal of Industrial Engineering Otopro Reswara: Jurnal Pengabdian Kepada Masyarakat Quantum Teknika Jurnal Kreatif : Desain Produk Industri dan Arsitektur REKONSTRUKSI TADULAKO: Civil Engineering Journal on Research and Development Jurnal Teknologi dan Manajemen Jurnal Polimesin Jurnal Industri Furnitur dan Pengolahan Kayu (JIFKA) Majalah Teknik Mesin Dinamika Kerajinan dan Batik: Majalah Ilmiah
Bahtiar Rahmat
Politeknik Industri Furnitur Dan Pengolahan Kayu
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering 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 Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

Published : 26 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 26 Documents
Search

 1   2   3 
EXPERIMENTAL STUDY ON OTTO ENGINE PERFORMANCE WITH VARIATIONS IN COMPRESSION RATIO AND GASOLINE OCTANE Bahtiar Rahmat; Irwan Setyo Prabowo; Yuris Bahadur Wirawan; Fahmy Zuhda Bahtiar
Otopro Vol 21 No 2 May 2026
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v21n2.p60-68

Abstract

This research aims to analyze the effect of compression ratio variation and gasoline octane number on the performance of spark-ignition internal combustion engines. The experimental object was a single-cylinder 124 cc motorcycle engine with an original compression ratio of 9.6:1. The compression ratio was increased to 10.6:1 by reducing the cylinder height by 0.6 mm. Performance testing was carried out using a dynamometer with two types of fuel, RON 88 and RON 92. Octane number 92 was selected based on fuel availability, while octane number 88 was used to evaluate engine performance under an increased compression ratio. A cylinder wall length reduction of 0.6 mm was applied as the maximum allowable limit, beyond which cylinder head modification would be required. The performance parameters evaluated were torque and brake power over an engine speed range of 4000–7000 rpm. The results indicate that increasing the compression ratio from 9.6:1 to 10.6:1 improved engine torque and brake power by approximately 3.8% to 4%. Meanwhile, the use of higher-octane gasoline (RON 92) increased performance by only about 2% to 2.4%, and only when used in the higher compression engine. In contrast, using high-octane fuel in a low-compression engine resulted in reduced performance due to ignition delay. Overall, the optimal performance was achieved when a high compression ratio was paired with high-octane fuel. Therefore, selecting an appropriate octane rating according to the engine compression ratio is essential to achieve optimal combustion efficiency, brake power output, and torque response.
Effects of depth of cut and feed rate on dimensional accuracy and surface roughness in CNC nesting of HMR panels Agung Ari Purwanto; Zain Amarta; Bahtiar Rahmat; Wahyu Widiyanto; Muhammad Fahrudin
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.8800

Abstract

The rapid adoption of digital manufacturing and smart CNC machining in furniture production has made the optimization of machining parameters for engineered wood panels increasingly important. High Moisture Resistance (HMR) panels are widely used because of their superior moisture resistance compared with Medium Density Fiber board (MDF). However, studies on CNC machining performance of HMR panels remain limited, particularly regarding dimensional accuracy and surface roughness. This study evaluates the effects of depth of cut and feed rate in CNC nesting on dimensional accuracy and surface quality of HMR panels. Four machining combinations were tested using depths of cut of 2 and 4 mm and feed rates of 33 and 66 mm/s, with three replications for each treatment. Specimen dimensions and average surface roughness (Ra) were measured after machining. The results show that depth of cut significantly affected dimensional accuracy, while feed rate significantly influenced surface roughness. The interaction between depth of cut and feed rate was not significant for specimen length, but was significant for specimen width and roughness. Optimal dimensional accuracy and surface quality were achieved using the lowest depth of cut (2 mm) in conjunction with the lowest feed rate (33 mm/s).
Pengaruh Metode Penyayatan dan Kedalaman Penyayatan terhadap Dimensi dan Kekasaran Permukaan Kayu Olahan Bahtiar Rahmat; Agung Ari Purwanto; Muhammad Fahrudin; Wahyu Widiyanto
Infotekmesin Vol 16 No 1 (2025): Infotekmesin: Januari 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i1.2537

Abstract

The application of CNC technology in the furniture industry has already become familiar, in addition to its use in the metal and plastic industries. HMR (High Moisture Resistant) panels, which had better moisture resistance than MDF (Medium Density Fiberboard), had also started to develop. However, few studies have investigated the effects of variations in machining parameters on the cutting quality of HMR boards. This study aimed to test the effects of machining parameters (cutting method and cutting depth) on the dimensions and surface roughness of the workpiece. Four schemes of machining parameter settings, namely conventional and climb methods with cutting depths of 2 mm and 4 mm, respectively, were performed with three repetitions each. After testing, it was found that the cutting method, cutting depth, and the interaction between the cutting method and cutting depth had not significantly affected the length and width dimensions of the specimen. However, the cutting method significantly influenced the final surface roughness of the specimen. The conventional cutting method with a cutting depth of 2 mm produced the best surface roughness, measuring 26.47 µm.
Numerical Analysis of Seat Inclination Effect on Student Chair Structural Performance Using Finite Element Method Taufik Ramadhan Fitrianto; Bahtiar Rahmat; Nurhanifah Nurhanifah; Siska Anggiriani; Desy Mulyosari; Alfani Risman Nugroho
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Student chairs are commonly designed based on ergonomic dimensions without considering the structural implications of seat configuration. This study investigates the effect of seat inclination on the structural response of a mahogany student chair using the Finite Element Method (FEM). Two anthropometrically derived chair models—a flat seat and a 4° inclined seat—were developed based on student anthropometric data from the Polytechnic of Furniture and Wood Processing Industry Kendal. Static simulations were performed in Autodesk Inventor 2022 under a 2000 N vertical seat load and an additional backrest load equivalent to 40% of the seat load. Structural performance was evaluated using Von Mises stress, total deformation, and Factor of Safety (FoS). The flat-seat model produced a maximum stress of 16.94 MPa, a deformation of 1.118 mm, and a FoS of 2.755, whereas the 4° inclined-seat model yielded 23.25 MPa, 1.501 mm, and 2.007, respectively. Although the inclined seat increased stress concentration and deformation, both configurations remained structurally safe, indicating that a 4° seat inclination represents an acceptable trade-off between ergonomic improvement and structural reliability.
Multifunctional 3D LED Night Lamp: Pengelolaan Limbah Kayu untuk Mengoptimalkan Ruang Sempit Amelia Puspita; Eugene Oryza Austin; Jhony Andereas Hutabarat; Oloan Simangunsong; Bahtiar Rahmat
Jurnal Industri Furnitur dan Pengolahan Kayu Vol 4 No 1 (2026): JIFKA Juni 2026
Publisher : Politeknik Industri Furnitur dan Pengolahan Kayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.67302/jifka.v4i1.451

Abstract

Pemanfaatan limbah potongan kayu dari industri furnitur menjadi tantangan dalam penerapan ekonomi sirkular. Penelitian ini bertujuan merancang dan menciptakan produk fungsional dari limbah kayu untuk mengoptimalkan ruang sempit, sambil menerapkan konsep futuristik. Metode yang digunakan adalah Design Thinking, yang meliputi tahap Empathize, Define, Ideate, Prototype, dan Test. Tahap Prototype menghasilkan produk Multifunctional 3D LED Night Lamp, sebuah lampu tidur multifungsi yang terintegrasi dengan rak kecil dan tempat pengisian daya nirkabel (wireless charger). Produk ini terbuat dari limbah kayu dan menerapkan teknologi cutting CNC 3D untuk menciptakan bentuk kubus yang futuristik dan minimalis. Hasil pengujian menunjukkan bahwa produk ini berhasil mengoptimalkan fungsi pencahayaan, penyimpanan, dan pengisian daya dalam satu unit yang ringkas. Inovasi ini membuktikan bahwa penanganan limbah industri dapat sejalan dengan penyediaan Solusi desain yang fungsional dan estetis untuk ruangan terbatas.
Analisa Simulasi Uji Beban Statik Vertikal Terhadap Sambungan Dowel Kayu Pada Produk Curved Feet Stool: Vertical Static Load Simulation Analysis on Wood Dowel Joints in Curved Feet Stool Products Rahmat, Bahtiar; Fitrianto, Taufik Ramadhan; Ulfia, Yessi Nasia; Prakoso, Galih
Dinamika Kerajinan dan Batik: Majalah Ilmiah Vol. 43 No. 1 (2026): DINAMIKA KERAJINAN DAN BATIK : MAJALAH ILMIAH
Publisher : Balai Besar Standardisasi dan Pelayanan Jasa Industri Kerajinan dan Batik

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kontribusi dengan persentase 80% terhadap produk ekspor mebel, furnitur menjadi industri dengan potensi pasar yang besar. Namun demikian, sambungan pada produk furnitur merupakan bagian yang perlu diperhatikan, karena pada bagian ini sangat rentan terjadi patahan atau kerusakan. Pengujian produk prototipe perlu sumber daya dan waktu lebih, sehingga dikembangkan metode pendekatan untuk memperoleh data hasil pengujian kekuatan produk tanpa membuat prototipe atau lebih dikenal dengan metode analisis elemen hingga (FEM). Penelitian ini bertujuan untuk menguji kekuatan sambungan dari produk stool yang dipasangkan pasak kayu dengan ukuran Ø10mm, Ø12mm & Ø14 mm sebagai konstruksinya. Hasil simulasi pembebanan statik menunjukkan jika aplikasi pasak kayu Ø10 mm menghasilkan tegangan maksimum 25,89 MPa, regangan senilai 0,0013, pergeseran sebesar 2,047 mm dan faktor keamanan senilai 1,59. Selanjutnya aplikasi pasak kayu Ø12 mm mencatatkan tegangan maksimum 23,14 MPa, regangan senilai 0,0011, pergeseran sebesar 0,562 mm serta faktor keamanan senilai 1,78. Aplikasi pasak Ø14 mm paling direkomendasikan karena mampu menahan beban 60kgf paling baik. Tegangan maksimum sebesar 16,07 MPa masih jauh dibawah nilai tegangan luluh material. Selain itu nilai pergeseran dan regangan maksimal hanya senilai 0,042 mm dan 0,0009 secara berurutan. Aplikasi dowel Ø14 mm juga mencatatkan faktor keamanan terbaik yakni sebesar 2,57.
Co-Authors Alfani Risman Nugroho Alfani Risman Nugroho Amarta, Zain Amelia Puspita Anshah Silmi Afifah Anshah Silmi Afifah Arip Wijayanto Bahtiar, Fahmy Zuhda Desy Mulyosari Desy Mulyosari Desy Mulyosari Dhian Juwitasari Eugene Oryza Austin F.Z. Bahtiar Fahmy Zuhda Bahtiar Fahrudin, Muhammad Fitrianto, Taufik Ramadhan Galih Prakoso Galih Prakoso, Galih Gilang Putra Paristiono Irwan Setyo Prabowo Jhony Andereas Hutabarat Katiko Imamul Muttaqin M.B.R. Wijaya Ma'wa, Safarah Putri Mohammad Burhan Rubai Wijaya Mohammad Burhan Rubai Wijaya Muhamad, Soleh Muhammad Afif Affandi Muhammad Fahrudin Mulyosari, Desy Muttaqin, Katiko Imamul Nugroho, Alfani Risman Nurhanifah Nurhanifah Nurhanifah Nurhanifah Nurhanifah Nurhanifah Nurmadina Nurmadina Nurmadina, Nurmadina Oloan Simangunsong Purwanto, Agung Ari Siska Anggiriani Siska Anggiriani Soleh Muhamad Syauqi Darmapratama Taufik Ramadhan Fitrianto Ulfia, Yessi Nasia Wahyu Widiyanto Wijaya , Mohammad Burhan Rubai Wijaya, Mohammad Burhan Rubai Y.B. Wirawan Yessi Nasia Ulfia Yuris Bahadur Wirawan Yuris Bahadur Wirawan Yuris Bahadur Wirawan, Yuris Bahadur