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All Journal J@TI (TEKNIK INDUSTRI) Tengkawang : Jurnal Ilmu Kehutanan PRODUCTUM : Jurnal Desain Produk (Pengetahuan dan Perancangan Produk) Journal of Sylva Indonesiana Infotekmesin Jurnal Kehutanan Papuasia (Journal of Papuasia Forestry) Jurnal Silva Tropika Jurnal Senopati : Sustainability, Ergonomics, Optimization, and Application of Industrial Engineering Integrasi: Jurnal Ilmiah Teknik Industri
Siska Anggiriani
Politeknik Industri Furnitur Dan Pengolahan Kayu
Agriculture, Biological Sciences & Forestry Arts Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

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Pengaruh Perlakuan Microwave terhadap Karakteristik Kayu Randu (Ceiba pentandra (L) Gaertn.: The Influence of Microwave Treatment on The Characteristics of Randu (Ceiba pentandra (L) Gaertn.) Wood Anggiriani, Siska; Nurhanifah, Nurhanifah; Sutiawan, Jajang
Jurnal Silva Tropika Vol. 6 No. 2 (2022): Jurnal Silva Tropika
Publisher : Fakultas Kehutanan Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jsilvtrop.v6i2.23765

Abstract

ABSTRACT Randu (Ceiba pentandra (L) Gaertn.) wood is one of the fast-growing species which has low density. Wood modification by microwave (MW) treatment were conducted to improve its quality. The aim of this work was to evaluate the effect of microwave treatment on the characteristics (physical properties, wood discoloration, and wettability) of Randu wood. Microwave treatment for 0.5 and 1 minute were applied for Randu wood. The evaluation of wood discoloration, wettability, and physical properties include moisture content, specific gravity, swelling, and anti-swelling efficiency (ASE) were measured.  Wood discoloration and wettability of untreated and treated sample were measured. The results showed that microwave treatment was reduce the swelling, wettability and cause discoloration. Microwave treatment not significantly affected moisture content and specific gravity of treated wood. Microwave treatment increased contact angle than untreated, and 0.5 minutes microwave treatment caused significant discoloration than 1 minutes microwave treatment and untreated sample. The MW treatment indicated to increase the hydrophobicity of Randu wood.   Keywords: discoloration, microwave, randu, wettability.   ABSTRAK Kayu randu (Ceiba pentandra (L) Gaertn.) merupakan salah satu jenis kayu cepat tumbuh yang memiliki kerapatan rendah. Modifikasi kayu dengan perlakuan microwave (MW) dilakukan untuk meningkatkan kualitasnya. Tujuan dari penelitian ini adalah untuk mengevaluasi pengaruh perlakuan microwave terhadap karakteristik (sifat fisik, perubahan warna kayu, dan keterbasahan) kayu Randu. Perlakuan microwave selama 0.5 dan 1 menit diaplikasikan pada kayu randu. Pengujian yang dilakukan yaitu perubahan warna kayu, keterbasahan, dan sifat fisis yang meliputi kadar air, berat jenis, pengembangan, dan anti-swelling efficiency (ASE). Hasil penelitian menunjukkan bahwa perlakuan microwave mengurangi pengembangan, keterbasahan dan menyebabkan perubahan warna. Perlakuan microwave tidak berpengaruh nyata terhadap kadar air dan berat jenis kayu. Perlakuan gelombang mikro meningkatkan sudut kontak dibanding kontrol, dan perlakuan microwave 0.5 menit menyebabkan perubahan warna yang signifikan dibanding microwave 1 menit dan tanpa perlakuan. Perlakuan MW dapat meningkatkan hidrofobisitas kayu randu.  Katakunci: keterbasahan, microwave, randu, perubahan warna.
Uji pembebanan statik meja kerja kantor dengan konstruksi pen-lubang dan alur-isian Bahtiar Rahmat; Taufik Ramadhan Fitrianto; Desy Mulyosari; Nurhanifah Nurhanifah; Siska Anggiriani; Anshah Silmi Afifah
Productum: Jurnal Desain Produk (Pengetahuan dan Perancangan Produk) Vol 9, No 1 (2026)
Publisher : Institut Seni Indonesia Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24821/productum.v9i1.17612

Abstract

An ergonomic work environment requires furniture to be compatible with the dimensions of the user's body in order to avoid musculoskeletal complaints and decreased productivity. A data-driven anthropometric design approach combined with structural simulation is a strategy to ensure both comfort and strength of the product. This study applies the Finite Element Method (FEM) to analyze the strength of a work table with a hole-and-groove construction before mass production. A combination of mahogany and plywood was chosen for cost efficiency, while the strength of the joints between components was the main focus of the evaluation. The simulation process included 3D modeling, material selection, boundary condition determination, loading in accordance with SNI 8781-2019, meshing, and analysis of results. The desk measured 1200×600×750 mm with four fixed support points on the legs. The results showed good structural performance in all tests. Stability and vertical strength tests showed that the stress and displacement were below the elastic limit of the material. Fatigue tests showed a damage level of only 1 percent, while drop tests resulted in a displacement of 1.55 mm without permanent deformation. Overall, the table design was deemed safe, stable, and suitable for production.
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.
Effect of Heat Treatment on Color Change and The Physical Properties of Sembilang Bamboo (Dendrocalamus giganteus Munro) Nurhanifah; Siska Anggiriani; Jajang Sutiawan
Journal of Sylva Indonesiana Vol. 7 No. 01 (2024): Journal of Sylva Indonesiana
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsi.v7i01.11244

Abstract

Timber as a raw material for making furniture is still lacking. One alternative to overcome this problem is bamboo. The potential for bamboo in Indonesia is quite large. Sembilang bamboo is a species of bamboo that has not been widely used. Research related to the effect of heat treatment on color change and the physical properties of bamboo needs to be carried out to determine color change and the dimensional stability of bamboo. This research was carried out by giving heat at 180°C for various durations (control, 3 hours, and 6 hours). The color change, moisture content, absorption, and specific gravity of heat-treated sembilang bamboo were researched. The results showed that the color of sembilang bamboo after heat treatment became darker than the control. The moisture content and absorption values of sembilang bamboo with heat treatment at 180°C for 6 hours were higher than the control and 3 hours. The specific gravity value of the bamboo control was higher than 3 hours and 6 hours for sembilang bamboo. Heat treatment at 180°C for 6 hours had an adverse effect on the physical properties of sembilang bamboo. Heat-treated sembilang bamboo at 180°C for 3 hours was recommended in this research
Co-Authors Alfani Risman Nugroho Anshah Silmi Afifah Anshah Silmi Afifah Arip Wijayanto Bahtiar Rahmat Desy Mulyosari Desy Mulyosari Dhian Juwitasari Fitrianto, Taufik Ramadhan Galih Prakoso, Galih Jajang Sutiawan Jajang Sutiawan Muhamad, Soleh Mulyosari, Desy Nugroho, Alfani Risman Nurhanifah Nurhanifah Nurhanifah Nurhanifah Nurhanifah Nurhanifah Nurhanifah Nurhanifah Retno Widiastuti Sutiawan, Jajang Taufik Ramadhan Fitrianto Wahyu Widiyanto