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All Journal Infotekmesin Journal of Industrial Engineering Jurnal Kreatif : Desain Produk Industri dan Arsitektur
Desy Mulyosari
Politeknik Industri Furnitur Dan Pengolahan Kayu
Arts Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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PENGARUH POSISI SAMBUNGAN KONSTRUKSI KAYU TERHADAP DEDAIN PRODUK MEBEL BERBAHAN DASAR KAYU Bahtiar Rahmat; Desy Mulyosari; Agung Ari Purwanto; Wahyu Widiyanto
Jurnal Kreatif : Desain Produk Industri dan Arsitektur Vol. 11 No. 1 (2023): Vol.11, No. 1, April 2023
Publisher : Indonesian Society of Applied Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46964/jkdpia.v11i1.336

Abstract

Wood furniture products were one of the commodities that have a dominant contribution compared to other furniture materials to the Indonesian economy. In furniture products, the connection system was a weak point in the construction, so a detailed analysis was needed regarding the factors that affect the strength of the construction and the effectiveness of the wood connection system. The purpose of this study was to determine the quality of the wood used as outdoor chair material by carrying out several tests to obtain wood density, moisture content, MOR and MOE values and then carrying out impact tests on actual outdoor chair products. The results showed that the teak wood used in the raw material for making the product had a moisture content of 12% with an average density of 0.68 g/cm3. The results of the static flexural strength test showed that the MOE of the tested teak was 107,108 kg/cm2 and the MOR value was 1,018 kg/cm2. The compressive strength value parallel to the fiber is 536 kg/cm2. The teak sample tested was included in strong class II which is quite strong as a raw material for furniture such as outdoor chairs. Analysis of the results of the construction design found that the type of construction used was tenon mortise, cracks at the joints occurred because the tenon was too close to the head of the wood. Based on the product test results, after the product with a new construction design was made, by lowering the tenon mortise position 3 mm from the initial position. The crack that occurs in the product is caused by an error in product construction design and not from the quality of the product raw materials used.
Studi Eksperimental Uji Kekuatan Sambungan Klasik dan Sambungan Modern pada Produk Furnitur Bahtiar Rahmat; Wahyu Widiyanto; Agung Ari Purwanto; Arip Wijayanto; Soleh Muhamad; Desy Mulyosari; Nurmadina Nurmadina
JIE Scientific Journal on Research and Application of Industrial System Vol 9, No 1 (2024)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/jie.v9i1.4843

Abstract

Sebagai produk bernilai tinggi dengan daya saing global, furnitur adalah salah satu komoditas strategis bagi ekonomi Indonesia. Pada produk furnitur, sambungan merupakan salah satu titik yang rentan terjadi kerusakan atau kegagalan konstruksi. Sehingga perlu untuk memilih metode sambungan yang tepat agar meminimalisir terjadinya kegagalan pada sambungan produk furnitur. Penelitian ini bertujuan untuk memberikan informasi tentang perilaku beban kegagalan kompresi diagonal pada sambungan kayu yang berbeda (sambungan klasik dan modern) yang dibuat dengan MDF. Metode sambungan yang dipilih yaitu Dowel (D), Biskuit Joint (B), Cross dowel (C), dan Insert nut (N). Pengujian tekan dengan dua skema telah dilakukan untuk melihat seberapa jauh masing-masing sambungan mampu menahan beban luar. Hasil pengujian menunjukkan, sambungan Cross dowel (C) adalah metode sambungan yang paling disarankan karena mampu menahan beban luar paling tinggi serta kemudahan saat instalasi pada produk furnitur knock-down. Sedangkan sambungan biskuit menjadi metode yang tidak disarankan karena selain proses pembuatan konstruksi yang lebih rumit, berdasarkan hasil pengujian tekan sambungan biskuit adalah sambungan yang mampu menahan beban luar paling rendah.
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.
Co-Authors Alfani Risman Nugroho Arip Wijayanto Bahtiar Rahmat Fitrianto, Taufik Ramadhan Nurhanifah Nurhanifah Nurmadina Nurmadina Purwanto, Agung Ari Siska Anggiriani Soleh Muhamad Wahyu Widiyanto