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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Rekayasa Mesin Emerging Science Journal Civil Engineering Journal Mekanika: Majalah Ilmiah Mekanika Jurnal Berdaya Mandiri SEMAR Abdi Masya
Dody Ariawan
Department Of Mechanical Engineering, Universitas Sebelas Maret, Surakarta 57126,
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DEVELOPMENT OF A SPACE-EFFICIENT AND LIGHTWEIGHT STUDY TABLE FOR ISLAMIC BOARDING SCHOOL STUDENTS Raharjo, Wijang Wisnu; Diharjo, Kuncoro; Ariawan, Dody; Raharjo, Wahyu Purwo; Kusharjanta, Bambang; Triyono
Abdi Masya Vol 6 No 2
Publisher : Pusat Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52561/abdimasya.v6i2.571

Abstract

This study presents the design, fabrication, and evaluation of a space-efficient, lightweight, and foldable study table intended to enhance learning conditions in Islamic boarding school (pesantren) environments. The table was designed using Computer-Aided Design (CAD) software with a focus on ergonomic principles, particularly a recommended working height of 70 cm to support proper posture. The final product features a durable steel tube frame, a plywood tabletop, and a collapsible leg mechanism, enabling compact storage in limited dormitory spaces. The fabrication process included precision cutting, Shielded Metal Arc Welding (SMAW), and the application of rust-resistant enamel paint, resulting in a total weight of approximately 6.5 kg with a load capacity of 40 kg.To evaluate its effectiveness, five students participated in comparative study sessions using both the old and the new table under controlled conditions. Concentration duration, used as the primary performance indicator, increased from an average of 264 seconds with the old table to 359 seconds with the new one—an improvement of 95 seconds or 36.43%. This enhancement is attributed to improved ergonomic posture, structural stability, and positive psychological effects stemming from user involvement and aesthetic design. The foldable design also allows better space utilization in multifunctional boarding school rooms. Overall, the table demonstrates significant functional and educational benefits and offers a scalable, low-cost solution for learning environments in resource-constrained settings. Future improvements may include using lighter materials and integrating storage or seating features to further improve user experience and usability.
Enhancing AA6061–Bottom Ash Composites: Role of Heat Treatment on Properties and Dimensional Stability Seputro, Harjo; Bintoro, Sefrian R.; Ariawan, Dody; Surojo, Eko; Triyono
Civil Engineering Journal Vol. 11 No. 11 (2025): November
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-11-023

Abstract

Aluminum matrix composites (AMCs) reinforced with industrial by-products have attracted attention as lightweight, sustainable materials, yet most research has focused on fly ash. The higher density of bottom ash compared to fly ash makes bottom ash suitable for use as reinforcement in AMC. This study investigates the combined effect of BA reinforcement (0, 3, and 6 wt%) and T6 heat treatment (aging at 175, 200, and 225 °C) on the microstructure, mechanical performance, thermal expansion, and dimensional stability of AA6061 composites. Mechanical testing, thermomechanical analysis (TMA), and coordinate measuring machine (CMM) evaluations were conducted to establish correlations between microstructure and macroscopic reliability. The results show that aging plays a decisive role in strengthening and stabilizing the alloy. The unreinforced AA6061 achieved peak hardness (69.43 BHN) and tensile strength (274.60 MPa) at 200 °C, but exhibited the largest distortion due to high thermal expansion. BA addition significantly reduced the mean coefficient of thermal expansion, with the 3 wt% BA composite aged at 200 °C demonstrating the most balanced behavior: stable CTE response, minimal distortion (0.1–0.4 mm²), and improved mechanical reliability. In contrast, 6 wt% BA composites, despite their lowest mean CTE (≈25 ppm/K), suffered from local instabilities due to particle agglomeration and porosity, leading to reduced toughness and higher geometric irregularities. Overall, this work highlights the novelty of employing BA as a sustainable reinforcement distinct from fly ash, showing that moderate BA addition coupled with optimized heat treatment can enhance dimensional stability and mechanical performance. The findings provide new insights into the design of cost-effective, environmentally friendly AMCs for structural applications.
Effect of Screw Rotation Speed on Mechanical Properties and Morphology of Abs/Mcc Composites Irvian Adhana; Dharu Feby Smaradhana; Dody Ariawan; Wijang Wisnu Raharjo; Burhanuddin Yusuf
Mekanika: Majalah Ilmiah Mekanika Vol 22, No 1 (2023): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v22i1.70884

Abstract

Acrylonitrile Butadiene Styrene (ABS) polymer can be modified to increase strength against resistance, toughness, and heat resistance by adding Microcrystalline Cellulose (MCC) as a reinforcement to ABS composites. Extrusion is one of the established methods of polymer processing with filler and consequently disperses filler inside the polymer. Different speed shows different behaviour of filler dispersion. Therefore, this study was conducted to know the effect of extruder screw speed variations on the mechanical, physical, and thermal stability of ABS/MCC composites. The compositions used in producing ABS/MCC composites were 96% for ABS and 4% for MCC. The production process used screw extruder speed variations of 10 rpm, 15 rpm, and 20 rpm. ABS/MCC composite in the barrel and hot press used 160 °C for the temperature process. The highest tensile strength was obtained at 10 rpm variation for 14.2 MPa. Increasing the speed of the extruder screw caused a decrease in MCC content attached to ABS which reduced the mechanical strength. ABS/MCC composite density value decreased with the increased extruder speed, as evidenced by the increasing number of voids formed based on Scanning Electron Microscopy (SEM) testing.
The Effect of Fumigation and Alkalization on Dimensional Changes of Cantula Fiber Reinforced Unsaturated Polyester Composites Under Immersion M. Ihsan Tri Wibowo; Dody Ariawan; Eko Surojo
Mekanika: Majalah Ilmiah Mekanika Vol 21, No 1 (2022): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v21i1.49463

Abstract

This study investigates the effect of fumigation and alkaline treatment on dimensional change in cantala fibers reinforced Unsaturated Polyester Resins (UPRs) composite under immersion test in an aqueous environment. Composites were fabricated using the compression molding method with cantala fiber content of 30% vt with the addition of 5% microcrystalline cellulose. Composite specimens were immersed under aquades for two months at room temperature. The dimensional changes of cantala fiber-reinforced UPRs in different solutions followed a Fickian behavior. The dimensional change of composites in solution shows the saturation point after several weeks of immersion. Fumigation-treated fibers and alkali-treated fiber composites after immersion have lower results in dimensional changes and slope than untreated fiber composites.
Peningkatan Potensi Wisata dengan Pemasangan Outdoor Fitness sebagai Upaya Peningkatan Kesehatan Masyarakat di Desa Karangasem Kab. Sukoharjo Wijang Wisnu Raharjo; Kuncoro Diharjo; Dody Ariawan; Wahyu Purwo Raharjo; Bambang Kusharjanta; U Ubaidillah
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 12, No 1 (2023): Mei
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v12i1.45314

Abstract

Jumlah usia muda yang tinggi perlu diberikan pembinaan fisik dan mental agar menjadi sumber daya manusia yang berkualitas di masa mendatang. Warga berusia muda di desa yang sudah mendapat informasi secara mudah juga memerlukan sarana olah raga fitnes yang tidak jauh dari tempat tinggal mereka. Alat ini akan memberika kesempatan kepada para pemuda untuk membentuk kesegaran jasmaninya dan berinteraksi sosial. Konsep itu dituangkan dalam bentuka pengembangan taman dan alat fitness outdoor sebagai alat kesehatan/pembinaan fisik masyarakat. Alat fitness yang dipasang pada ruang terbuka dapat dimanfaatkan masyarakat untuk berolahraga dan berwisata di satu objek wisata yang sedang dikembangkan. Dengan adanya kegiatan ini diharapkan masyarakat secara tidak sadar mulai kembali bergerak secara fisik dan menyadari pentingnya berolahraga selain itu juga penyegaran jiwa melalui kegiatan wisata alam. Dengan naiknya minat berolahraga dan menekan tingkat kejenuhan diharapkan akan membentuk sumber daya manusia dengan kualitas fisik dan mental yang tinggi. Teknik Mesin, Fakultas Teknik, Universitas Sebelas Maret menghadirkan solusi dengan menyumbangkan alat out door fitness yang diharapkan dapat meningkatkan animo kehadiran masyarakat di area pariwisata Gunung Pegat. Alat yang dipasang berjenis self actuation dengan memanfaatkan beban badan sendiri. Alat ini melatih otot lengan dan perut karena kontraksi utama pada area tersebut. Setelah pemasangan alat tersebut, masyarakat antusias memanfaatkan alat – alat yang dipasang.Kata kunci :  Kesehatan; masyarakat;  olah raga;  out door; interaksi, sosial.
Co-Authors . Mujtahid Aditya Afrizal Aditya Rio Prabowo Agus Nuramal Ari Prasetyo Ari Prasetyo Arif Setyo Nugroho Bambang Kusharjanta Bambang Kusharjanta Bintoro, Sefrian R. Burhanuddin Yusuf Cahyo Hadi Wibowo Dharu Feby Smaradhana Dikdo Kus Indarto Dwi Masruri Eko Purwanto Eko Surojo Eko Surojo Eko Surojo Eko Surojo Fahmi Imanullah Hammar Ilham Akbar Harjo Seputro, Harjo Hendri Hestiawan Imam Abdul Majid Irvian Adhana Khairul Amri Kuncoro Diharjo M. Ihsan Tri Wibowo Majid, Imam Abdul Mas'ud Nur Hanif Muhayat, Nurul Nurul Muhayat Sudibyo Sudibyo Sunardi Sunardi Syamsul Hadi Syamsul Hadi Teguh Triyono Titis Srimuda Pitana, Titis Srimuda Tohid Ghanbari-Ghazijahani Triyono U Ubaidillah Wahyu Purwo Raharjo Wijang Wisnu Raharjo Wijang Wisnu Raharjo Wijang Wisnu Raharjo Wijang Wisnu Raharjo Wijang Wisnu Raharjo Wijang Wisnu Raharjo Wijang WR WR Wijang