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All Journal TEKNIK E-Dimas: Jurnal Pengabdian kepada Masyarakat Journal of Mechanical Engineering Science and Technology Journal of Community Empowerment for Health Nusantara Science and Technology Proceedings Jurnal Pengbdian Teknik Mesin Biomedical and Mechanical Engineering Journal
Wahyu Dwi Lestari
Universitas Pembangunan Nasional Veteran Jawa Timur
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation

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SEM Analysis of UHMWPE for Biomedical Application Wahyu Dwi Lestari; Luluk Edahwati; Tria Puspa Sari; Ndaru Adyono; Novel Karaman
Biomedical and Mechanical Engineering Journal (BIOMEJ) Vol. 1 No. 1 (2021): BIOMEJ
Publisher : Mechanical Engineering Department at Universitas Pembangunan Nasional "Veteran" Jawa Timur

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Abstract

The objective of this study is to investigate the wear mechanism of UHMWPE acetabular liner. There were three samples of acetabular liner with variations without crosslink, with crosslink doses of 50 kGy and 100 kGy which were subjected to a wear testing process. The wear test was carried out using a Tribometer wear testing machine with a total of 30,000 cycles and a load of 800N. Microstructure analysis was performed using scanning electron microscopy (SEM). The results show that the surface of the UHMWPE acetabular liner with the crosslink treatment is smoother than the untreated one. This shows that UHMWPE with crosslink treatment has a lower wear rate, where the greater the crosslink dose the lower the wear rate. The wear mechanism that occurs in this study is the third body abrasion which leads to adhesive wear.
The Observation of Struvite (MgNH4 PO4 .6H2O) Precipitation Using Visual MINTEQ Radissa Dzaky Issafira; Luluk Edahwati; Sutiyono; Ndaru Adyono; Wiliandi Saputro; Wahyu Dwi Lestari; Ahmad Khairul Faizin; Tria Puspa Sari
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

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Abstract

Struvite or Magnesium Ammonium Phosphate Hexahydrate (MgNH4 PO4.6H2O) is one of the precipitates that generally form in the piping system. The formation of struvite in the piping system is one of the serious problems that can cause blockages, reduced flow volume, and pipe diameter so that it will increase maintenance and production costs. This formation of struvite scale in industrial instruments is detrimental; however, struvite can be used as raw material for slow-release fertilizers. This study will observe the effect of pH in the range of 8, 8.5, 9, 9.5, and 10 on the formation of struvite compositions, consisting of Mg, NH4, PO4, Ca, and K in the surrounding temperature 35oC. The results of this study will be observed using visual MINTEQ software. The result shows that the most suitable pH for struvite formation is 9.5.
Characteristics of Specific Fuel Consumption on Exhaust Emissions in Diesel Engines Fueled by B20 and B100 Wiliandi Saputro; Jayan Sentanuhady; Willie Prasidha; Luluk Edahwati; Wahyu Dwi Lestari; Ndaru Adyono; Tria Puspa Sari; Ahmad Khairul Faizin; Radissa Dzaky Issafira
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

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Abstract

The dependence of Indonesian people on diesel fuel is still very high, proven by the increasing amount of diesel fuel consumption yearly. The increase in diesel fuel consumption is a severe problem that must be anticipated because diesel is a fuel that originates from fossils and is non-renewable. In addition to its limited availability, environmental issues are also a matter of concern in the use of diesel fuel because the resulting exhaust emissions can interfere with health and increase global warming. One way to overcome this is to switch from fossil fuels to biofuels, i.e., biodiesel. Although theoretically biodiesel can be used directly as a substitute for diesel fuel, there is very little research on the fuel consumption required for the exhaust emissions produced. Therefore this study aims to determine the correlation between the characteristics of specific fuel consumption (SFC) on exhaust emissions produced in diesel engines using B20 (20% biodiesel + 80% diesel) and B100 (100% biodiesel) fuel. Based on the results of the study, it was found that an increase in SFC resulted in a downward trend in carbon monoxide (CO) and carbon dioxide (CO2) emissions. In the meantime, the hydrocarbon (HC) emissions and the resulting smoke opacity increased; this was influenced by several factors such as an increase in combustion temperature, increased deposit, and component wear.
The Effect of Electrode Gap Distance on Brown's Gas Tria Puspa Sari; Denny Widhiyanuriyawan; Radissa Dzaky Issafira; Wahyu Dwi Lestari; Ndaru Adyono; Wiliandi Saputro; Ahmad Khairul Faizin
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

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Abstract

The electrolysis of water is one of many methods to produce hydrogen by converting electrical and thermal energy into hydrogen and oxygen. In this study, a generator of the HHO dry cell type is used to produce brown gas. Brown’s gas consists of two hydrogens and one oxygen or Oxyhydrogen (HHO). Observation will be conducted to obtain the effect of electrode gap distance to increase the productivity of Brown’s Gas with a mixture of 2500 ml pure water and catalyst of NaHCO3. The results show that if the electrode gap is small, it will produce more brown gas than the long gap. However, research still needs to be done on how close the electrode gap distance is needed to produce maximum brown gas.
Sosialisasi tentang Implementasi Ilmu Teknik Mesin pada Dunia Biomedik di Jurusan Teknik Pemesinan SMK Turen Malang Wahyu Dwi Lestari; Tria Puspa Sari; Ndaru Adyono; Luluk Edahwati
Abdi-mesin: Jurnal Pengabdian Masyarakat Teknik Mesin Vol. 2 No. 1 (2022): Abdi-Mesin
Publisher : Program Studi Teknik Mesin Universitas Pembangunan Nasional "Veteran" Jawa Timur

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Abstract

Ilmu teknik mesin menjadi sebuah keilmuan yang berkontribusi besar dalam kecanggihan teknologi, diantaranya yaitu adanya keilmuan terkait komposit, mekratonika, nanoteknologi, manufaktur, biomekatronik dan yang sedang mendapat sorotan saat ini adalah tentang alat-alat medis. Aplikasi ilmu teknik mesin pada dunia biomedik disosialisasikan di Jurusan Teknik Pemesinan SMK Turen Malang oleh program studi teknik mesin melalui kegiatan Pengabdian kepada Masyarakat (PKM). Materi sosialisasi disampaikan dengan metode ceramah dan diskusi interaktif. Melalui kegiatan ini diharapkan dapat memberikan pengetahuan dan wawasan pada siswa dan guru-guru di SMK Turen Malang terutama di Jurusan Teknik Pemesinan.
Passive Prosthetic Ankle Design Based on Indonesian Anthropometry Wahyu Dwi Lestari
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 6, No 1 (2022)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v6i12022p001

Abstract

Foot prosthesis is a replacement for the foot to overcome activity limitations due to disease, birth defects, accidents or amputations. Many foot prosthetics have been developed in recent years to treat patients. However, prostheses on the market today have drawbacks, including their high price, lack of comfort, stiff ankles, and low durability. The main objective of this study is to develop an existing ankle-foot prosthesis design that approximates the resemblance of a human foot according to the anthropometry of Asians, especially Indonesians. This study contains the design of a prosthetic foot with a skin design model and a support core. The prosthetic core supports the use of a compliance mechanism (CM) model that functions to connect the limb organs that have been amputated. The design process is carried out using the Solidwork software. Ankle foot prostheses are designed to be able to withstand a load of 100 kg and can be used for patients with a height range of 150 cm to 180 cm. Based on the design results, it is found that the prosthesis mass is lower than the lowest mass of the user, so it feels light, ergonomic and flexible when used.
Analysis of Combustion Temperature on Specific Fuel Consumption (SFC) of Diesel Engines Using B100 and B20 Fuel in the Long Term Wiliandi Saputro; Muhammad Ikhsan; Erwan Adi Saputro; Wahyu Dwi Lestari; Luluk Edahwati; Ahmad Khairul Faizin; Sutiyono; Ndaru Adyono; Tria Puspa Sari; Radissa Dzaky Issafira
Nusantara Science and Technology Proceedings 3rd International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2022.2716

Abstract

Indonesia is one of the largest palm oil-producing countries globally, with a production value of 40 million tons by 2020. Biodiesel is one of the alternative energy sources that can be processed from palm oil. Diesel engines can directly use biodiesel as a fuel. Biodiesel has distinct characteristics from diesel; thus, it will affect performance and other things on the engine. In this research, diesel engine performance tests were carried out, including specific fuel consumption (SFC), cylinder head temperature, cylinder block, and exhaust pipe, with a test time of 300 hours. This research aims to determine the effect of the cylinder head, cylinder block, and exhaust pipe temperatures on SFC using two different fuels, i.e., B100 and B20. Based on the test results, the average cylinder head, cylinder block, and exhaust pipe temperatures on the B100 engine are 136 oC, 130 oC, and 257 oC. As for the B20 engine's cylinder head, block, and exhaust pipe temperatures are 139 oC, 132 oC, and 264 oC. Engine with B100 fuel obtained SFC of 0.317 kg/kW.hour and engine with B20 fuel obtained SFC of 0.276 kg/kW.hour. In general, the combustion temperature in the cylinder head affects the increase in SFC in both engines with different fuels; the higher the combustion temperature in the cylinder head, the higher the SFC is. Engines with B100 fuel have a higher SFC value than B20 fuel, which is influenced by the higher viscosity and density values; thus, the droplets from the fuel atomization process become larger when compared to fuels with lower viscosity and density values. The graph analysis shows that the cylinder block temperature graph on the B100 and B20 fueled engines decreases between temperatures of 133-134 oC, then inflates with the increase in specific fuel consumption. The higher temperature compared to the B100 fuel engine makes the fuel undergo complete combustion when injected into the combustion chamber due to atomization or very fine droplets burning completely. The cylinder block temperature chart on the B100 and B20 fueled engines has a very significant trend difference. B100 engines tend to experience a decreasing trend in temperature along with an increase in SFC, while B20 engines tend to experience an increasing temperature trend along with an increase in SFC.
Implementation of household-scale clean water treatment technology for the mountain farming community, Jajar village, Gandusari district, Trenggalek Wahyu Dwi Lestari; Luluk Edahwati; Wiliandi Saputro
Journal of Community Empowerment for Health Vol 5, No 2 (2022)
Publisher : Faculty of Medicine, Public Health, and Nursing, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcoemph.67490

Abstract

Currently, the need for clean water which is a vital source for people's lives has not been fully met for all Indonesians, including the mountain farming community, Jajar Village, Gandusari District, Trenggalek Regency. So far, the mountain farming community members of Jajar Village have used mountain water for household needs where cloudy and unstable water conditions are a problem that must be faced. If this problem continues, it will lead to serious health problems and social conflicts in the community. Therefore, through community service activities, we made a practical clean water treatment tool, with easily obtained materials, that can be implemented in hilly areas such as in Jajar Village, Gandusari District, Trenggalek Regency. The filtration system used is an upflow and downflow system where the water undergoes a filtration process twice in the material that has been selected and arranged in a systematic way. The materials used are available and easy to obtain in Jajar Village, so that people can discover easily about the benefits of these materials. After making a water filtration system with the community, then physical testing is conducted on the quality of the water produced. From the test results of the effectiveness of the implementation of clean water treatment technology applied to mountain farmers in Jajar Village, it shows that in general the filtered water has met the physical requirements for the level of turbidity, taste, and smell, as well as the quantity and continuity of water are always available when needed.
Pelatihan CAD Static Simulation Menggunakan Solidworks di SMK Turen Malang Wahyu Dwi Lestari; Luluk Edahwati; Ndaru Adyono
E-Dimas: Jurnal Pengabdian kepada Masyarakat Vol 13, No 4 (2022): E-DIMAS
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/e-dimas.v13i4.12802

Abstract

Persaingan dunia kerja yang semakin ketat dan jumlah lapangan pekerjaan yang terbatas menuntut SDM berkualitas tinggi agar mampu bersaing secara nasional maupun global. Pendidikan vokasi memiliki peran melahirkan siswa dengan keahlian tinggi yang ditunjang berbagai kompetensi yang sesuai dengan perkembangan dunia industri. Salah satu kompetensi keahlian di SMK Turen Kabupaten Malang adalah program pendidikan keahlian Teknik Permesinan. Penggunaan software untuk keperluan gambar teknik yang biasa digunakan di Industri seperti Solidworks yang menawarkan banyak fitur desain/ perancangan serta dilengkapi fitur simulasi gerak, mechanical, simulation dsb. masih belum banyak diketahui oleh tenaga pengajar. Prodi Teknik Mesin UPNVJT turut serta mengambil andil dalam pengembangan SDM Indonesia melalui skema pengabdian masyarakat di LPPM UPNVJT yaitu Pemanfaatan IPTEKS Bagi Masyarakat (PIKAT). Tujuan dari kegiatan ini adalah untuk menyelenggarakan pelatihan kepada tenaga pengajar di SMK Turen Kabupaten Malang untuk membantu meningkatkan kompetensi pada bidang desain, perancangan dan simulasi. Metode yang dipakai pada kegiatan ini adalah pelatihan dalam bentuk workshop dan praktikum dengan project base learning. Pelatihan ini memiliki target peningkatan kemampuan tenaga pengajar dalam bidang desain dan perancangan khususnya pada simulasi pembebanan statis, sehingga kedepannya dapat dijadikan materi dalam kurikulum pembelajaran di SMK Turen Malang. Berdasarkan kegiatan pelatihan yang telah dijalankan maka didapatkan hasil berupa peningkatan pengetahuan dari guru-guru di SMK Turen Malang terkait dengan penggunaan software Solidworks baik untuk kebutuhan desain maupun simulasi.
Analysis of Ankle Foot Design for Transtibial Prosthesis Components using the Finite Element Method Wahyu Dwi Lestari; Ndaru Adyono
TEKNIK Vol. 43, No. 3 (2022): December 2022
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v43i3.48653

Abstract

Finite element method (FEM) has been identified as a tool that can be used to analyze stress and strain behavior occurring in prosthetic components of the lower extremities. The main objective of this study was to analyze the structure of the alternative ankle foot designed for the transtibial prosthesis component. The ankle foot is designed and simulated for strength using Solidworks software. There are two alternative designs of the ankle foot that are designed. The material used is AISI 304 with Young's Modulus 193000 MPa and Poisson's Ratio 0.29. Based on the design results, the lowest weight is owned by alternative design 1 of 491.69 grams. The simulation was carried out under normal running conditions in the midstance phase. The applied load is 1000N. There are three data obtained from the simulation results in the form of von Mises stress, deformation, and strain energy. Based on the simulation results on alternative ankle foot design 2, the value of von Misses stress is lower. Even so, the two alternative designs that have been designed are still within safe limits because they still meet the predetermined safety factor value. 
Co-Authors Ahmad Khairul Faizin Ahmad Khairul Faizin Denny Widhiyanuriyawan Dhian Satria Yudha Erwan Adi Saputro Fauzatul Laily Nisa Ferdi Kurniawan Jayan Sentanuhady L.Urip Widodo, Yohandrik Novel Karaman Luluk Edahwati Luluk Edahwati Luluk Edahwati Luluk Edahwati Luluk Edahwati Luluk edahwati Luluk Edahwati Mr. Sutiyono Muhammad Ikhsan Ndaru Adyono Ndaru Adyono Ndaru Adyono Ndaru Adyono Ndaru Adyono Novel Karaman Radissa Dzaky Issafira Radissa Dzaky Issafira Radissa Dzaky Issafira Radissa Dzaky Issafira Radissa Dzaky Issafira Tria Puspa Sari Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Willie Prasidha