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All Journal Abdi Masya Automotive Experiences Journal of Mechanical Engineering, Science, and Innovation
Hermawan, Muhammad Vendy
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Pembuatan Alat Cuci Tangan Portabel Dalam Upaya Mencegah Penulran Covid-19 Di Kelurahan Sangkrah, Pasar Kliwon, Kota Surakarta: PEMBUATAN ALAT CUCI TANGAN PORTABEL Supriyanto, Agung; Hermawan, Muhammad Vendy
Abdi Masya Vol 1 No 1
Publisher : Pusat Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52561/abma.v1i1.39

Abstract

Perhatian dunia saat ini sedang fokus pada penanganan wabah virus COVID-19 yang sudah dinyatakan sebagai pandemi pada awal Januari 2020. Sebagian besar negara sudah menerapkan karantina wilayah untuk mencegah terjadinya penyebaran virus yang cepat. Indonesia sendiri tengah berupaya untuk mengatasi masalah penularan wabah COVID-19 dengan menerapkan social distancing bagi warganya. Kelurahan Sangkrah adalah salah satu wilayah di kota Surakarta yang sudah dinyatakan sebagai daerah zona merah penyebaran COVID-19 oleh Bapak Walikota. Terdapat 2 kasus positif COVID-19 pada bulan April 2020 di wilayah ini. Dengan pertimbangan tersebut, perlu dilakukan penanganan serius guna memutus penyebaran virus COVID-19. Salah satu cara yang dapat dilakukan adalah dengan menambahkan sarana tempat cuci tangan kepada masyarakat Kelurahan Sangkrah. Cuci tangan dengan sabun pada air mengalir terbukti lebih ampuh membunuh virus jika dibandingkan dengan hanya menggunakan cairan hand sanitiser. Tempat cuci tangan portabel yang didedikasikan untuk warga kelurahan Sangkrah berguna untuk memutus mata rantai penyebaran COVID-19. Alat cuci tangan ini telah digunakan dengan baik oleh warga masyarakat Kelurahan Sangkrah. Setelah mendapat penyuluhan tentang pentingnya cuci tangan, berdampak pada peningkatan kesadaran masyarakat untuk cuci tangan.
Effect of Tube Thickness Configuration of Two Segments Circular Crash Box on Its Crashworthiness Performance Hermawan, Muhammad Vendy; Choiron, Moch. Agus; Purnowidodo, Anindito; Winarto, Winarto
Automotive Experiences Vol 8 No 1 (2025)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13170

Abstract

This study aims to investigate the effect of tube configuration with different bottom fixation components on the energy absorption of a two-segment crash box. The circular tube thickness configuration has two thickness levels, half of the length of the tube has thicker walls (t2), and the other half has thinner walls (t1). The t1 values ​​are 1, 1.5, 2 and 2.5 mm while t2 is constant, 3 mm. Finite element analysis using ANSYS WORKBENCH was performed for the axial load model. The bottom fixation component uses Cutting Die Model (CDM) and Flat Model (FM). Sixteen crash box models were run to provide the effect of two tube thickness configurations and CDM-FM fixation components. The material of the circular tubes is Aluminum 6063 with a Bilinear Hardening Model assumption. Crashworthiness performance indicators were observed based on the values ​​of Energy Absorber (EA), Specific Energy Absorber (SEA), initial peak force (Fmax), and Crash Force Efficiency (CFE). The results show that the CDM model has the lowest Fmax value, due to the use of the die, which stimulates easier initial folding in the tube end area. The CDM model also has better SEA and CFE values. According to the results obtained from computer simulations, the CDM-t2t1 model with t1=1mm exhibited the highest Specific Energy Absorption (SEA) of 67.93 kJ. On the other hand, this same crash box model provided the smallest Fmax of 205.88 kN and the highest CFE value of 0.69. From these results, it can be concluded that this model provides the best crashworthiness performance.
Comparative Analysis of E5–E15 Fuel Blends and 10–14 g CVT Roller Mass on the Power–Torque Curves of a 110 cc Automatic Motorcycle Hermawan, Muhammad Vendy; Andriyansyah, Deni; Safarudin, Muhammad Ilyas
Journal of Mechanical Engineering, Science, and Innovation Vol 6, No 1 (2026): (April)
Publisher : Institut Teknologi Adhi Tama Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2026.v6i1.8716

Abstract

This study aims to evaluate the combined effects of low level ethanol blending and CVT roller mass variation on the power and torque characteristics of a 110 cc automatic motorcycle. Experiments were conducted using two Pertalite–ethanol fuel blends, E5 and E15, in combination with CVT roller masses ranging from 10 g to 14 g. Engine performance was evaluated using a dynotest, enabling direct measurement of the power–rpm and torque–rpm characteristics for each fuel–roller configuration. The results indicate that increasing the ethanol content from 5% to 15% leads to a consistent improvement in engine performance across the tested range. Compared with E5, the E15 blend produces higher peak power and torque while maintaining the performance peak within the mid range engine speed region that is favorable for CVT operation. Among the tested configurations, the combination of E15 fuel with an 11 g roller delivers the best overall performance, achieving a maximum power of 8.94 hp at approximately 7,200 rpm and a peak torque of 9.21 Nm at around 7,000 rpm. In contrast, heavier rollers tend to reduce peak torque and shift the effective power band toward higher engine speeds, which is less beneficial for daily riding conditions. These findings demonstrate the interaction between fuel blending and CVT roller mass in shaping the power–torque characteristics of automatic motorcycles and provide practical guidance for optimizing performance under everyday operating conditions.
Co-Authors Agung Supriyanto, Agung Anindito Purnowidodo Deni Andriyansyah Moch. Agus Choiron Safarudin, Muhammad Ilyas Winarto Winarto