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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Teknologi AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat Seminar Nasional Teknologi Informasi Komunikasi dan Industri Dinamisia: Jurnal Pengabdian Kepada Masyarakat Automotive Experiences Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Akbar, Musthafa
Universitas Riau
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Other

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Structural Analysis of Pylon Head for Cable Stayed Bridge Using Non-Linear Finite Element Method Akbar, Musthafa; Nugraha, Aditya Sukma
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 51 No 1 (2018): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (770.994 KB) | DOI: 10.36842/jomase.v51i1.40

Abstract

Cable-stayed bridge is a type of bridge structure that commonly used for long-span range. This study provides an important opportunity to advance the understanding nonlinearities of material and geometry which is used for pylon of cable-stayed bridge structure. This study limited to response of pylon structure subjected to tension load which already calculated previously using structural analysis program. The methodology of structural analysis in order to determine working stress in the pylon structure under cable tension load is based on non-linear finite element method by incorporating an elastic-plastic material model and involve large deformation logarithm. In this study, laboratory experiment was held using test method ASTM A370. In finite element of plasticity analysis Ramberg-Osgood model was used to generate stress-strain curve of material. Based on finite element analysis that we have done, both of pylon structure will be fail or experience permanent plastic deformation if it subjected to loading conditions as mentioned in this research. The most critical regions in the structure are at Section A2 for left side pylon and at Section A11 for right side pylon. In critical regions, maximum Von-Misses stress reach 427.96 MPa for left side pylon and 430.56 MPa for right side pylon. Those stress value are beyond yield strength of material which is used for the structure. Design optimization can be done for the structure with some considerations, e.g. modification of design in the critical region, improve material properties or just change thickness of material in the critical regions.
The Performance of Undershot Water Turbine Combined With Spiral Tube Pump On Empowerment of Energy Resources Local Contiguous Small River Asral, Asral; Akbar, Musthafa; Syafri, Syafri
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 42 No 1 (2017): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1368.747 KB) | DOI: 10.36842/jomase.v42i1.186

Abstract

Hundreds of kilometers of irrigation canals are generally contiguous the village has not been maximally helpful as well most of damaged. Basically, in the water flow available an amount of energy could be harnessed as a renewable energy resources. Shortage of water and electricity supplies are the major issues encountered by the villager. Irrigation canals have head differences including low coupled lies in lowland areas. Picohydro electric generation, undershot-type water turbine suited for low high head applications in attemp to gain the electricity. To move the water, spiral tube pump mounted on the turbine can be installed simultaneously on generating systems. The turbine developed has an outer diameter of 2 m with 18 pieces of straight blade prepared from the material of aluminum. On the side of the turbine wall embeded the spiral tube pump with 5 coils was designed to operate concurrently with electrical generation. The height of water resources varied by controlling the opening of sluice gates to find out the potential. Throughout study the maximum electric voltage achievements was 125 volt. At the same time, the pump discharged the water with 9 liters per menit. These results provide sufficient supply of freshwater and electrical power for a family at contiguous area.
Pengembangan Media Promosi dan Media Informasi Wisata di Kelurahan Batu Bersurat, Kabupaten Kampar, Riau Anuar, Kaspul; Huda, Feblil; Fatra, Warman; Herisiswanto; Faisal, Gun; Rosa Putra Cupu, Dedi; Somadona, Sonia; Akbar, Musthafa; Martin, Awaludin; Nazaruddin; Syafri
Aksiologiya: Jurnal Pengabdian Kepada Masyarakat Vol 7 No 4 (2023): November
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/aks.v7i4.10738

Abstract

Potensi objek wisata yang terdapat di Batu Bersurat belum tergarap dengan serius dan maksimal. Hal ini dapat dilihat dari minimnya sarana informasi dan promosi terkait keberadaan objek wisata di wilayah ini. Selain itu, minimnya keberadaan sarana pendukung turut menjadi penyebab rendahnya kunjungan wisatawan di wilayah ini. Berdasarkan pada permasalahan tersebut. Tim melaksanakan kegiatan pengabdian dalam bentuk pengembangan sarana dan penyediaan akses informasi wisata dalam rangka meningkatkan minat dan kunjungan wisatawan di Kelurahan Batu Bersurat, Kabupaten Kampar. Kegiatan pengabdian ini diawali dengan pembuatan foto udara dan foto landscape di area wisata Batu Bersurat dengan menggunakan wahana pesawat terbang tanpa awak tipe fixed wing. Selanjutnya kegiatan dilanjutkan dengan pembuatan video udara sinematik dengan memanfaatkan dua unit pesawat tanpa awak tipe rotary wing (drone). Hasil dari pembuatan media promosi wisata berbentuk video udara sinematik, foto landscape dan foto udara, selanjutnya diintegrasikan ke dalam media informasi wisata berbasis website yang juga dibuat oleh tim pengabdian. Diharapkan dengan adanya media promosi dan media informasi wisata ini, memudahkan pengelola objek wisata di Batu Bersurat, untuk mempromosikan ke khalayak ramai terkait keindahan objek wisata yang terdapat di Batu Bersurat.
Balancing Rotor Dinamik Menggunakan Sinyal Suara Saputra, Ariadi; Huda, Feblil; Akbar, Musthafa
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Rotating machines that have been operating within a certain period of time there is frequent vibration. The vibration is usually caused by unbalance, misalignment, bearing defect, and others. Unbalance is ranked as a first cause of vibration, which more than 80% cases of vibration caused by unbalance. This condition causes the balancing process needs to be done. A commonly method of vibration measurement uses vibration sensors such as accelerometer or vibrometer, that should be affixed to the machine in operation. This can cause discomfort and may even dangerous the operator when measuring the machines. The solution of the problem can be done using non contact measurement, where the sensor is not attached directly to the test equipment. Microphone is a device that can record the sound signal without necessarily contact the tested device. The unbalance tendency of the test is characterized by the presence of the dominant frequency at one rotational speed (1 x rpm). From the test, the result of balancing of normal condition on one rotor and two rotors are 0.039 V and 0.031 V with balancing efficiency 87.88% and 80.74% respectively. The addition of unbalance mass on one rotor and two rotors is obtained balancing result of 0.031 V and 5.88x10-3 V with efficiency balancing of 93.58% and 97.43% respectively.Keywords : voice signal, unbalance, balancing, microphone, unbalance mass
A Comparative Study of Winding Angle Configurations for Improved Crashworthiness in Hybrid Al/CFRP Crash Boxes Akbar, Musthafa; Dewi, Dyah Kusuma
Automotive Experiences Vol 8 No 3 (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.14280

Abstract

This study investigates the crashworthiness performance of circular hybrid aluminum/carbon fiber reinforced polymer (Al/CFRP) crash boxes under dynamic axial impact, with particular focus on the influence of winding angle configurations. An explicit finite element model, validated against both experimental and numerical results from the literature, was developed using finite element software. The parametric analysis systematically varied CFRP winding angles from [±15°]₅ to [±85°]₅ in 10° increments and compared the outcomes with single and double cell aluminum crash boxes. Key crashworthiness indicators, including peak crushing force (PCF), mean crushing force (MCF), crushing force efficiency (CFE), stroke efficiency, and folding stability, were evaluated. The results reveal that hybridization significantly enhances load bearing capacity compared to conventional aluminum designs. Intermediate winding angles from 35 to 55 degrees yielded the best balance between PCF reduction, MCF enhancement, and stable progressive folding, with the [±45°]₅ configuration achieving the highest MCF and CFE, while [±35°]₅ minimized PCF. In contrast, winding angles greater than or equal to [±65°]₅ generated excessively high PCF, compromising occupant safety. The findings provide actionable insights for the design of hybrid crash boxes, demonstrating that optimized fiber orientation can advance crashworthiness beyond current aluminum or narrow angle hybrid configurations.
Co-Authors , Yohanes Alfakhri Biranda Anuar, Kaspul April Yando ARI SETIAWAN Asral, Asral Awaludin Martin Cupu, Dedi Rosa Putra Dyah Kusuma Dewi Feblil Huda Gun Faisal Herisiswanto Herisiswanto Herisiswanto Herisiswanto Herisiswanto Herisiswanto Idznur Rizky Muhammad Imam Nugraha Juliandi Ashari M. Faisal M. Ferdiman Setepu N. Nazaruddin Nazaruddin Putrawani, Eky Rachman Setiawan Reysca Admi Aksa, Reysca Admi Romi Saputra, Ariadi Saputra, Ariadi Somadona, Sonia Sukma Aditya Syafri Syafri Syafri, Syafri Vicry Darmawan Wahyu Yustyanto Warman Fatra, Warman Yohanes