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All Journal SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Energy, Materials and Product Design
Agus Dwi Catur
University of Mataram
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SIFAT TEKAN DAN BENDING PANEL SANDWICH BETON RINGAN SELULAR DENGAN PENGUAT PIN BAMBU Agus Dwi Catur; Pandri Pandiatmi; Fikri Haikal
Energy, Materials and Product Design Vol. 2 No. 2 (2023): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

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Abstract

Bamboo plants are a type of grass with hollow segments in the stems, cylindrical, hard and in each book has buds or branching eyes. This bamboo plant can grow around 1200 meters above sea level and lowlands with humidity conditions and broad soil types. This plant is often found growing wild around river banks, forests, or fields. This plant is used by the community to make matting, bamboo bridges, concrete reinforcement, and so on. Concrete is a mixture consisting of sand, gravel or crushed stone and other aggregates mixed together with a paste made from a mixture of cement and water to from a rock-like mass. Lightweight concrete is concrete with a weight of less than 1900 kg/m3. The value of compressive strength is smaller than ordinary concrete and is not good at conducting heat. The specific gravity of lightweight concrete varies greatly depending on the lightweight aggregate used. Sandwich components are a type of structural composite that has the potential to be developed. Sandwich composite is a composite composed of 3 layers consisting of a flat composite (metal sheet) as the surface skin (skin) and the core material (core) in the middle (the part between). Sandwich composite is a type of composite that is very suitable for resisting bending, impact, vibration and sound dampening. Sandwich composites are made to obtain a lightweight structure but have high stiffness and strength. Usually the selection of sandwich composites materials, the requirements are light weight, heat and corrosion resistance, and price is also considered. The purpose of this study is to utilize the addition of bamboo as a concrete reinforcement instead of steel, to create a very affordable cost and to find out how much influence the addition of bamboo pins has as a core reinforcement in sandwich composites on the compressive and bending strength of the lightweight concrete. The variation of the spacing of the bamboo pins used is 3 cm and 4 cm for the width, and 4 cm 6 cm for the length of each sandwich composite. The size the sandwich composites varies, while for compression testing it has a length of 15 cm, a width of 15 cm and a thickness of 7,5 cm. And for the bending test it has a length 40 cm, a width of 10 cm, and a thickness of 7,5 cm. The results showed that there was an increase in strength in the compressive test from those who did not use pins of 0,646 N/mm2, and those who used pins with a distance of 3 cm x 4 cm of 1,94 N/mm2 and a distance of 4 cm x 6 cm of 1,596 N/mm2. Where the longer the distance between the bamboo pins, the strength decreases. For the bending test it also shows an increase from without pins having a value of 0,43 N/mm2 to adding pins with a pin spacing of 3 cm x 4 cm having a value of 0,89 N/mm2 and experiencing a decrease in pin spacing of 4 cm x 6 cm with a value of 0,25 N/mm2.
PENGARUH PENAMBAHAN UNSUR TEMBAGA PADA PENGECORAN TEKAN BLOK SILINDER BEKAS TERHADAP NILAI IMPAK DAN KEAUSAN : EFFECT OF ADDITION OF COPPER ELEMENTS IN THE COMPRESSION CASTING OF USED CYLINDER BLOCKS ON IMPACT VALUE AND WEAR Sinarep; Agus Dwi Catur; Mujiantara Daeng Permana; Ahmad Zainuri
Energy, Materials and Product Design Vol. 3 No. 2 (2024): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

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Abstract

The cylinder liner block is part of the cylinder block which functions as a place for the engine working process to take place. Where in this section the suction, compression, work and exhaust processes occur. Cylinder blocks have two types, some can be repaired and cannot be repaired, to utilize cylinder blocks that cannot be repaired by recycling them by casting metal with copper (Cu) with variations in the addition of 5%, 10%, 15% with a casting temperature of 1150⁰C using metal molds using the press technique method. Data collection was carried out by wear testing, impact testing, and microstructure testing. By increasing the percentage of copper (Cu) in the cylinder block casting, the highest wear was obtained with the addition of 15% Cu of 2,87×10-9 m3. The highest impact strength of 15% Cu is 0.12 Joule/mm2.
EFFECT OF OVERLAP LENGTH AND ADHESIVE THICKNESS ON THE SHEAR STRENGTH OF JUTE FIBRE COMPOSITE AND FIBREGLASS COMPOSITE JOINTS Sugiman; Aji Noven Setyawan; Agus Dwi Catur; Hilton Ahmad
Energy, Materials and Product Design Vol. 5 No. 1 (2026): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/empd.v5n1.316-322

Abstract

Adhesively bonded joints have attracted the attention of engineers for connecting different materials to develop lightweight structures. The materials that can be bonded include composite materials with different reinforcements, such as glass and natural fibres, but to achieve optimal strength, factors such as adhesive thickness and overlap length remain decisive. This study aims to determine the effect of overlap length and adhesive thickness on the shear strength of jute fibre-reinforced composite and glass fibre-reinforced composite joints. This study used single lap joints according to ASTM D1002. The overlap lengths varied by 15, 20, 25, and 30 mm, while the adhesive thicknesses varied by 0.2, 0.4, and 0.6 mm. This study found that joint strength decreases with increasing overlap length, whereas the effect of adhesive thickness depends on overlap length. At overlap lengths of 15 and 20 mm, joint strength increases with increasing adhesive thickness, whereas at 25 and 30 mm overlap lengths, it appears to remain constant. The optimal adhesive thickness is 0.4 mm.  At an overlap length of 20 mm, the shear strength at adhesive thicknesses of 0.4 mm and 0.2 mm is 4.58 MPa and 3.71 MPa, respectively, or an increase of about 36% relative to the 0.2 mm thickness. The results imply that for hybrid jute and fibreglass composite joints, a short overlap length (i.e., 15 mm) and an adhesive thickness below 0.4 mm are recommended.
Peningkatan produktivitas kerja di usaha kecil pada Dusun Ambung, Desa Masbagik Timur, Kecamatan Masbagik, Kabupaten Lombok Timur Syarif Hidayatullah; Syahrul Syahrul; I Dewa Ketut Okariawan; Salman Salman; Agus Dwi Catur; Suteja Suteja; Ahmad Akromul Huda
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 10, No 3 (2026): June (In Progress)
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v%vi%i.39007

Abstract

AbstrakUsaha kecil di Dusun Ambung, Desa Masbagik Timur, masih menghadapi kendala efisiensi produksi akibat penggunaan alat tradisional dalam pengolahan keripik singkong. Proses pemotongan singkong secara manual membutuhkan waktu lama, menghasilkan irisan yang kurang seragam, dan meningkatkan risiko cedera kerja. Kegiatan pengabdian ini bertujuan meningkatkan produktivitas kerja mitra melalui penerapan alat pemotong singkong berbasis teknologi tepat guna. Metode kegiatan meliputi observasi lapangan, persiapan dan perakitan alat, sosialisasi penggunaan alat, edukasi manfaat teknologi, serta serah terima alat kepada mitra usaha kecil. Seluruh tahapan dilakukan secara partisipatif agar mitra dapat memahami, menggunakan, dan merawat alat secara berkelanjutan. Hasil kegiatan menunjukkan bahwa penggunaan alat pemotong singkong meningkatkan kapasitas pemotongan dari 8–10 kg/jam pada metode manual menjadi 22–26 kg/jam setelah alat digunakan, atau sekitar 2,4–2,8 kali lebih tinggi. Waktu pemotongan untuk 10 kg singkong juga berkurang dari sekitar 60–75 menit menjadi 23–27 menit. Selain itu, hasil irisan menjadi lebih seragam, kebutuhan tenaga kerja berkurang, dan risiko cedera saat produksi dapat diminimalkan. Program ini menunjukkan bahwa inovasi sederhana berbasis teknologi tepat guna dapat meningkatkan efisiensi, produktivitas, dan daya saing usaha kecil pengolahan singkong. Kata kunci: usaha kecil; alat pemotong singkong; teknologi tepat guna; produktivitas; Dusun Ambung. AbstractSmall businesses in Ambung Hamlet, Masbagik Timur Village, still face production efficiency challenges due to the use of traditional tools in cassava chip processing. The manual cassava cutting process is time-consuming, produces uneven slices, and increases the risk of workplace injuries. This community service activity aims to improve the productivity of small business partners through the implementation of cassava-cutting tools based on appropriate technology. The activity methods include field observations, tool preparation and assembly, training on tool usage, education on the benefits of the technology, and the handover of tools to small business partners. All stages were conducted in a participatory manner so that partners could understand, use, and maintain the tools sustainably. The results of the activity show that the use of the cassava cutting tool increased cutting capacity from 8–10 kg/hour using manual methods to 22–26 kg/hour after the tool was used, or approximately 2.4–2.8 times higher. The cutting time for 10 kg of cassava also decreased from about 60–75 minutes to 23–27 minutes. In addition, the slices became more uniform, labor requirements were reduced, and the risk of injury during production was minimized. This program demonstrates that simple innovations based on appropriate technology can improve the efficiency, productivity, and competitiveness of small cassava processing businesses. Keywords: small business; cassava cutting tool; appropriate technology; productivity; Ambung Hamlet.
Co-Authors Ahmad Akromul Huda Ahmad Zainuri Aji Noven Setyawan Fikri Haikal Hilton Ahmad I Dewa Ketut Okariawan Mujiantara Daeng Permana Pandri Pandiatmi Salman Salman Sinarep Sugiman Suteja Suteja Syahrul Syahrul Syarif Hidayatullah