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Design Optimisation of Outer Hood Panel of Esemka R2 Car to Improve Pedestrian Protection Atmoko, Nugroho Tri; Riyadi, Tri Widodo Besar
Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri 2024: Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Traffic accidents are terrible scourge that occur in many countries, specially for developing countries where transportation affairs like tangled yarn. Besides functioning as an engine compartment cover, the hood of modern compact SUV can also help to manage the impact energy of a pedestrian's head in a vehicle-pedestrian impact. This paper presents outer hood design of Esemka R2 that has a potential to improve hood's ability and also to absorb the impact energy of a pedestrian's head. The developed method for the design of an outer hood configuration aims to provide a robust design and homogeneous of Head Injury Criterion (HIC) for impact position at WAD 1000 and three different thicknesses (1.25 mm, 1.35 mm & 1.50 mm) of outer hood panel of Esemka R2 compact SUV, taking into consideration the limited space available for deformation. The non-linear Finite Element Analysis (FEA) software (Explicit Dynamics) was used in this research to simulate the testing procedurs of head impact for child pedestrian. The results show that the average of comparison dimensional of outer hood panel of Esemka R2 was 4.89 mm. The minimum of deformation space meet the requirement for HIC value which required obtaining robust and homogeneous head impact performance. Outer hood thickness and materials were identified as the factors to influence the stress and HIC value of the hood. By comparing all outer hood panels, aluminium alloy as the best selected material which has the lowest value is 32.78% for the pedestrian protection.
Studi Pengaruh Perlakuan Panas terhadap Struktur Mikro dan Sifat Mekanis Baja SKD-11 yang Digunakan pada Komponenstud Pin Winder Aji, Rizki Bimo; Riyadi, Tri Widodo Besar; Purboputro, Pramuko Ilmu
Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri 2024: Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Industri pembuatan benang, garmen dan tekstil di indonesia banyak menggunakan mesin-mesin pemintal benang buatan luar negeri. Sehingga bila ada kerusakan harus mendatangkankomponen-komponen mesin dari negara asal pembuat dan membutuhkan waktu yang lama dalam pengadaan barang serta menanggung biaya yang tinggi pula. Oleh karena itu industri dalam negeri membutuhkan ketersedian komponen tersebut, agar dalam proses perbaikan dan perawatan dapat dilakukan dengan cepat dan menekan biaya produksi. Pada penelitian ini dilakukan karakterisasi material baja SKD-11 melalui proses perlakuan panas dengan cara normalizing dan tempering. Dalam penelitian ini dilaksanakan dengan cara memanaskan material hingga temperatur austenit 1000⁰C dengan waktu penahanan 2 jam dan didinginkan di udara terbuka. Kemudian dilakukan tempering dengan variasi temperatur 200⁰C, 300⁰C, 500⁰C, 550⁰C, 600⁰C dengan waktu penahanan 1 jam. Kemudian dilakukan pengujian kekerasan, impak (ketangguhan), dan struktur mikro. Hasil dari pengujian menunjukkan nilai kekerasan tertinggi ada pada sampel baja SKD 11 dengan proses anneling yaitu sebesar 75,4 HRC dan terendah ada pada sampel baja SKD 11 dengan variasi temperatur tempering 550⁰C sebesar 50 HRC, serta baja SKD 11 yang tidak mengalami proses perlakuan panas sebesar 36,19 HRC. Pada uji impact nilai ketangguhan stud pin original sebesar 1,76 J/mm2, nilai ketangguhan tertinggi pada sampel material baja SKD 11 tanpa melalui proses perlakuan panas yaitu sebesar 0,14 J/mm2dan nilai ketangguhan terendah ada pada sampel material baja SKD 11 dengan variasi temperatur tempering 550⁰C sebesar 0,05 J/mm2. Berdasarkan studi lapangan bahwa stud pin patah karena gaya impact, maka baja SKD 11 tidak bisa menggantikan stud pin original.
The Effect of Reactant Compositions on The Microstructure of Ceramic Materials Formed by Combustion Synthesis Riza, Ramzul Irham; Riyadi, Tri Widodo Besar; Wijianto, W
Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri 2024: Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Ceramics have been attractive as advance materials for high temperature applications due to their advantages such as high modulus, high hardness, high melting temperature, and high corrosion resistance. Of a broad range of ceramics, titanium carbide and aluminide have developed into one of the most interesting ceramics since they have high strength and good wear resistance at elevated ceramic materials. Producing TiC-Al2O3 from economical material (TiO2) is less expensive than that from their elemental powders. The combustion synthesis (CS) process offers significant advantages to fabricate TiC-Al2O3 since it produces high exothermic reaction and takes a short processing time. The objective of this study was to explore the combustion synthesis of TiC-Al2O3 and investigate the effect of reactant compositions on the combustion process and microstructure of synthesized products. The combustion synthesis was carried out in a combustion chamber with an atmospheric condition. The ignition technique to initiate the CS was performed using an arc flame. The microstructure and mechanical properties of synthesized products were observed. The result of this research would benefit for producing a high performance ceramic material obtained from economical material with an efficient process.
ELEKTROPLATING Ni/Cu PADA BAJA KARBON Riyadi, Tri Widodo Besar
Prosiding University Research Colloquium Proceeding of The 8th University Research Colloquium 2018: Bidang Teknik dan Rekayasa & Bidang Tekni
Publisher : Konsorsium Lembaga Penelitian dan Pengabdian kepada Masyarakat Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY

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Abstract

Nikel-tembaga (Ni/Cu) merupakan kandidat bahan lapisan logam yang potensial untuk aplikasi di bidang pipa penukar panas, bejana tekan, instalasi kapal laut, pelindung oksidasi barang elektronik, dan bahan komponen magnet karena mempunyai sifat yang tahan korosi, sifat magnetik yang unik, kekuatan tarik dan keuletan yang cukup tinggi. Pelapisan logam dengan teknik elektroplating cukup menarik karena proses yang murah dan sederhana. Penelitian ini bertujuan untuk mengetahui pengaruh tegangan listrik pada pelapisan Ni/Cu terhadap ketebalan lapisan, kekerasan, dan ketahanan aus permukaan produk. Penelitian dilakukan dengan menggunakan baja karbon ST-40 sebagai logam induk, larutan nikel dan larutan Cu. Proses elektroplating Ni dilakukan dengan tegangan konstan 2.3 volt dan waktu celup konstan 30 menit. Proses elektroplating Cu dilakukan dengan variasi tegangan 1.3, 1.8, 2.3, 2.8, dan 3.3 Volt dengan waktu celup konstan 30 menit. Karakterisasi ketebalan lapisan dilakukan dengan optical microscope, pengujian kekerasan dilakukan dengan alat mikro Vickers, dan pengujian keausan menggunakan alat uji keausan type ogoshi testing machine. Hasil pengukuran permukaan menunjukan bahwa dengan kenaikan tegangan listrik dari 1.3 Volt sampai 3.3 Volt menyebabkan kenaikan ketebalan lapisan Cu dari 28.7 ?m sampai 36.4 ?m, kenaikan kekerasan lapisan Cu dari 125.13 HV sampai 137.03 HV, kenaikan penurunan dari 7.62 x 10-6 mm2/kg sampai 2.26 x 10-6 mm2/kg.
Sosialisasi Pengolahan Limbah Organik Rumah Tangga Melalui Budidaya Magot di Desa Pandeyan, Kecamatan Grogol, Kabupaten Sukoharjo Tri Atmoko, Nugroho; Suryono, Edy; Besar Riyadi, Tri Widodo; Teofilus Riyadi, Natanael; Awan, Sang Alang; Wicaksono, Bagas; Yuniarta, Fajar; Bagus Nugroho, Taufik; Putra Tegar Permata, Septian
Jurnal Suara Pengabdian 45 Vol. 2 No. 3 (2023): September: Jurnal Suara Pengabdian 45
Publisher : LPPM Universitas 17 Agustus 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/pengabdian45.v2i3.1059

Abstract

Organic waste is an environmental problem, especially in the villages of Pandeyan, Grogol, Sukoharjo, so there is a need to solve this problem through direct community activities. One solution is the socialization activity on organic waste processing through magot cultivation in Pandeyan village. With this socialization, it is hoped that the community will gain further understanding regarding magot cultivation as an effort to process household organic waste to make it more useful. The socialization activity was conducted at the Pandeyan village office on August 30, 2023. To measure the success of socializing organic waste processing through magot cultivation, an evaluation was carried out using a questionnaire method distributed to participants. From the questionnaire results, it was found that 88.9% of the total participants understood magot cultivation. Meanwhile, if you look at the potential of organic waste in each household participating in this socialization, it is possible to process it through magot cultivation. However, there is still a need for assistance and further understanding regarding magot cultivation because there is still a stigma that maggots have a maggot-like shape and are not suitable for cultivation.
ANALISIS PERUBAHAN BENTUK CHASIS TERHADAP BEBAN SEBAGAI DASAR PERANCANGAN MESIN BENDING HIDRAULIC Makinun, Makinun; Anggono, Agus Dwi; Riyadi, Tri Widodo Besar
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1841

Abstract

In the world of the automotive industry there are still several problems that must be resolved, such as what happened in one of the workshops, there was a shortage of tools to repair bent truck frames because of the accident. One of the tools needed to repair the frame is the bending tool, with this the planning process for making the tool has a problem with the ability of the hydraulic tool to be used to repair the frame of the Mitsubishi Center 125. With the simulation method using SolidWorks software, it can be seen that the force load on the frame of the Mitsubishi center 125 will then obtain data that can be analyzed using the finite element method. In the simulation, try to use a force load of 1 ton.f to 20 ton.f at two points, namely the center and side, then can be seen that the displacement of the object that occurs. The results of the simulation are increasing the force load, the degree of change in shape is increasing along with the damage to the object and the highest change of 500 mm so it requires the ability of hydraulic tools that have a compressive capacity of more than 20 tons.