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All Journal Journal of Mechanical Science and Engineering Jurnal Rekayasa Mesin AUSTENIT Simposium II UNIID 2017 Calamity: A Journal of Disaster Technology and Engineering Jurnal Pelita Sriwijaya
Hendri Chandra
Pengajar Pasca Sarjana Jurusan Teknik Mesin Fakultas Teknik Universitas Sriwijaya
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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ANALISIS KEKUATAN TALI BAJA (WIRE ROPE) PADA ALAT ANGKAT GANTRY CRANE PADA PROYEK PEMBANGUNAN LRT (LIGHT RAIL TRANSIT) ZONA 5 PALEMBANG Yogi Saputra; Hendri Chandra
Simposium II UNIID 2017 Vol 2 (2017)
Publisher : Simposium II UNIID 2017

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Abstract

Jalur perlintasan LRT (Light rail transit) dibangun dengan menggunakan erection girder. Pengangkatan erection girder tersebut menggunakan pesawat angkat gantry crane. Penelitian ini bertujuan untuk mengevaluasi kekuatan dari tali baja (wire rope) yang digunakan pada alat angkat tersebut. Metode penelitian yang digunakan adalah dengan cara observasi, survei, tinjauan pustaka, serta perhitungan secara analitis dan evaluasi. Sistem pengangkatan ini menggunakan tali baja (wire rope) dengan konstruksi 6 X 36 WS + IWRC berdiameter 51 mm. Hasil evaluasi menunjukkan bahwa untuk tegangan tarik yang bekerja pada tali baja untuk berat girder 30 ton dan 60 ton masih dalam kondisi aman dikarenakan tegangan yang bekerja σt< σijin, yaitu 18.571 kg/mm2 < 33.3 kg/mm2 dan 23.1313 kg/mm2 < 33.3 kg/mm2 .
The Influence of Matrix Banana Stem Fiber Volume Fraction Recycled Polypropylene (RPP) toward Bending Test Diah Pratiwi Kusuma; Hendri Chandra; Tumpal Ojahan Rajagukguk
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

ABSTRAKSerat alam telah terbukti sebagai material yang kuat, mampu untuk menggantikan serat sintetik sebagai penguat. Serat batang pisang kepok yang memiliki kekuatan tarik 68,44 MPa dengan bundalan rata-rata 0,698 mm salah satu serat yang memiliki potensi sebagai penguat untuk polymer material komposit. Pada material komposit bermatriks recycled polypropylene (RPP) berpenguat serat batang pisang kepok dapat menahan beban yang diterima material komposit. Sedangkan recycled polypropylene (RPP) sebagai pengikat serat batang pisang, bekerja menahan beban dan melindungi serat dari kerusakan.  Hasil pengujian yang paling optimal terdapat pada volume fraksi 35% fiber : 65% matriks dengan  tegangan bending 122,09 N/mm2, modulus elastisitas 2975 MPa, momen bending 126,59 N/mm2 dan tegangan lentur 64,34 MPa. Pada pengamatan SEM fraksi volume 35% filler : 65% matriks paling optimal karena adanya ikatan matriks dan serat menyatu dengan sempurna. Dari penelitian ini dapat disimpulkan bahwa pengaruh fraksi volume serat batang pisang kepok sebagai penguat (fiber) dan recycled polypropylene (RPP) sebagai pengikat (matriks) pada material komposit akan mempengaruhi kekuatan material komposit lebih kuat dan getas. Apabila ditinjau dari keseluruhan pengujian yang dilakukan maka fraksi volume yang paling optimal terdapat pada fraksi volume 35% filler : 65% matriks.
PENYULUHAN PEMBUATAN KOPRA KEPADA IBU-IBU PKK KELURAHAN KARANGJAYA KECAMATAN GANDUS PALEMBANG Pratiwi, Diah Kusuma; Gunawan, Gunawan; Arifin, Amir; Eka Utami, Nurhabibah Paramitha; Prakoso, Akbar Teguh; Saputra, M. A. Ade; Kaprawi, Kaprawi; Chandra, Hendri; Ellyanie, Ellyanie; Sipahutar, Riman
Jurnal Lentera Nusantara Vol 3 No 1 (2024): Jurnal Pelita Sriwijaya: in progress
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/jps.v3i1.135

Abstract

Indonesia adalah salah satu negara penghasil kelapa terbesar di dunia. Kelapa merupakan bahan baku pembuatan minyak yang dipergunakan untuk berbagai keperluan. Kelapa diolah menjadi kopra yang bertujuan untuk mengurangi kandungan uap air dan menambah ringan, dan meningkatkan kandungan minyak didalamnya.Salah satu daerah di Palembang yang banyak terdapat kelapa adalah Kelurahan Karang Jaya Kecamatan Gandus. Penyuluhan cara mengolah kelapa dilakukan kepada ibu-ibu PKK dan penduduk dengan cara ceramah, diskusi, dan pemutaran video-video. Kegiatan ini telah berhasil dengan baik yang ditunjukkan oleh antusiasme peserta penyuluhan untuk belajar mengolah kelapa menjadi kopra dan nilai hasil evaluasi yang cukup signifikan.
Failure analysis of pulverizer pipe elbow in PLTU boiler Chandra, Hendri; Zulkarnain, Rizki; Rafli Fazal, Muhammad
Calamity: A Journal of Disaster Technology and Engineering Vol. 1 No. 1: (July) 2023
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/calamity.v1i1.2023.44

Abstract

Erosion occurs due to several different mechanisms, depending on the composition, size, shape of the eroding particles, speed, angle of impact, and surface composition of the eroded components. The pulverizer pipe elbow has become worn out due to the pulverized coal fluid abrasion flowing on the pipe, which the type is AISI Grade 1026. This study was carried out on the causes of this damage case. Damage to the elbow in the boiler needs to be analyzed for the failure of the elbow so that the damage's cause is known and it becomes a lesson so that the same damage does not occur again. The research aims to: 1. Find out the cause of damage to the pulverizer elbow on the boiler; 2. Know the correct maintenance strategy to increase the reliability of pulverizer pipes in boilers; 3. Simulate erosion due to coal particles in the pulverizer pipe using the Autodesk Simulation Computational Fluid Dynamics software program; 4. Analytical calculations of the erosion rate that occurs at the bend of the pulverizer pipe (elbow) in the boiler. The analysis was done by visual observation, hardness testing, metallographic observation, simulation of the ANSYS CFD program, and analytical calculation. The result of the ANSYS simulation showed that the main factor causing the leakage was erosion-corrosion. In the leaking area, the corrosion concentration was higher than in other areas, indicated by the red color in that area. From the calculation results, it was concluded that the largest erosion rate occurs at the angle of 200 with the value is 4.9548 x 10- 11 m3 / s, the smaller the pulverized coal’s angle of impact crashed the pulverizer pipe elbow, the greater the erosion.
ANALISIS CACAT PENYUSUTAN DAN NILAI KEKERASAN PRODUK COR ALUMINIUM SKRAP DENGAN VARIASI UKURAN MILD STEEL CYLINDER MOLD Nurhabibah Paramitha Eka Utami; Pratiwi, Diah Kusuma; Chandra, Hendri; Ellyanie, Ellyanie; Gustini, Gustini; Astuti, Astuti
Jurnal Rekayasa Mesin Vol. 25 No. 1 (2025): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v25i1.1414

Abstract

The research was conducted to investigate the effect of mold diameter variation on the hardness and shrinkage of cast products made from aluminum scrap. Three mold diameter variations were used in the casting process: 50 mm, 70 mm, and 100 mm. The testing methods included shrinkage measurement, Brinell hardness testing, and dye penetrant inspection. The test results showed that the 50 mm sample had the highest hardness value of 52.09 BHN and the lowest shrinkage defect of 25.25%, while the 100 mm diameter sample exhibited the lowest hardness value of 48.72 BHN and the highest shrinkage defect of 28%. This phenomenon occurred due to differences in cooling rates during the solidification process, where larger mold diameters experienced slower cooling, resulting in coarser microstructure grains and a higher occurrence of shrinkage defects.
SOSIALISASI PENGECORAN ALUMINIUM SKRAP SEDERHANA DALAM UPAYA PEMANFAATAN LIMBAH LOGAM DAN PEMBERDAYAAN MASYARAKAT Utami, Nurhabibah Paramitha Eka; Chandra, Hendri; Marwani, Marwani; Pratiwi, Diah Kusuma; Ellyanie, Ellyanie; Puspitasari, Dewi; Astuti, Astuti; Sipahutar, Riman; Gustini, Gustini; Gunawan, Gunawan; Utama Putra, Risky
Jurnal Lentera Nusantara Vol 4 No 1 (2025): Jurnal Pelita Sriwijaya
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/jps.v4i1.183

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk memberdayakan masyarakat pra-sejahtera di kawasan Gandus, Palembang, melalui pelatihan dan sosialisasi pengecoran aluminium skrap sederhana sebagai upaya pemanfaatan limbah logam menjadi produk bernilai jual. Permasalahan yang dihadapi masyarakat setempat antara lain terbatasnya lapangan pekerjaan, rendahnya keterampilan teknis, serta belum optimalnya pemanfaatan limbah logam yang selama ini hanya dikumpulkan atau dijual dengan harga murah. Metode pelaksanaan kegiatan meliputi survei lapangan, pemberian materi teori, pembuatan tungku pengecoran sederhana, serta praktik langsung pengecoran aluminium skrap. Untuk mengukur efektivitas kegiatan, dilakukan pretest dan posttest terhadap peserta, yang menunjukkan peningkatan signifikan dalam pemahaman peserta terkait konsep dasar pengecoran, nilai ekonomis aluminium, dan keselamatan kerja. Hasil kuesioner juga menunjukkan bahwa 78,57% peserta menyatakan kegiatan ini sangat diperlukan dan materi yang disampaikan mudah dipahami. Dengan demikian, kegiatan ini memberikan kontribusi nyata dalam peningkatan keterampilan dan pemberdayaan masyarakat berbasis pemanfaatan limbah logam secara produktif.
INVESTIGATION OF STRESS ON MULTI-LEVEL SHAFT USING FINITE ELEMENT METHOD BASED ON COMPUTER-AIDED ENGINEERING Chandra, Hendri; Putra, Dicky Pratama; Romli, Romli
AUSTENIT Vol. 13 No. 1 (2021): AUSTENIT: April 2021
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

The shaft is a rod that is part of the engine element with a circular cross-section that functions to move rotation without continuing power. Research on the stress concentration factor on the shaft continues to be developed significantly to mitigate torsional loads, bending loads, and axial loading. This study investigates the stress on a multilevel shaft using three methods: the engineering design method, simulation method, and analysis using the finite element method to obtain the investigated stress value based on computer-aided engineering. The material used in the shaft test is AISI 1020 steel with two research variables, namely, the independent variable with radius (mm); 0 mm, 2 mm, 6 mm, 10 mm, 20 mm, 50 mm, and the dependent variables are von mises and displacement. Based on the results of the test investigations that have been carried out by simulating the shaft, it can be concluded that the addition of radius material as the investigated variable by applying a torque of 50 N.m will reduce the stress on the shaft, and this does not apply to the displacement that occurs on the shaft when the force or load is working.
DESIGN OF AUTOCLAVE FOR FRESH SHRIMP STERILIZATON PROCESS USING FINITE ELEMENT ANALYSIS Chandra, Hendri; Abdi, Jusran; Homzah, Ozkar F.; Basri, Hasan; Azhari, Ikbal; Utami, Nurhabibah Paramitha Eka
AUSTENIT Vol. 14 No. 2 (2022): AUSTENIT: October 2022
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v14i2.5676

Abstract

Chloramphenicol is one of antibiotic compound which is an additional ingredient that is forbidden to be used in food products, especially in fresh shrimp product export. To avoid the used of preservative, then required sterilization process in a physical way which is vaporization using a high-pressure supercritical carbon dioxide (CO2). One of sterilization process for supercritical carbon dioxide is using autoclave media. Autoclave is a closed heating device used to sterilize or reducing a substance or object that is disserve by using high temperature and high pressure steam. In designing and constructing autoclave, the first step to be done is to define the function and the operation capacity. The function and capacity will determine the initial dimension of autoclave as well its working pressure and temperature. In this study, the autoclave was designed with quantitative methods and modeling using software Autodesk inventor 2016 based on finite element method. The given load is in the form of supercritical carbon dioxide pressure of 73.83bar and temperature of 31.30C. Based on the result of design, quantitative methods gives the safe result and optimized thickness needed autoclave usage.
KARAKTERISTIK PERMUKAAN PATAH DAN KETAHANAN LELAH PADA MATERIAL BEJANA TEKAN BAJA ASTM A36 Azhari, Ikbal; Chandra, Hendri; Homzah, Ozkar F.; Ramadhoni, Tri Satya; Sampurno, Rachmat Dwi
AUSTENIT Vol. 16 No. 1 (2024): AUSTENIT: April 2024
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v16i1.7219

Abstract

Pressure vessels are equipment in the industrial field to hold pressurized fluids, such as gas, oil and chemicals, ASTM A36 steel is one type of material that can be used in pressure vessels, this steel has good mechanical properties but still has limitations in its fatigue resistance. Pressure vessels receive internal and external loads, this pressure difference results in stress on the wall (shell). This stress can cause material damage, therefore the author conducted fatigue repeated bending and Scanning electron microscopy (SEM) testing to analyze fatigue resistance and fracture surface characteristics. Fatigue testing of 4 specimens with angle variations of 4Ëš, 8Ëš, 11Ëš and 13Ëš resulted in a cycle count of 1490200 cycles, 400050 cycles, 234200 cycles and 99000 cycles respectively. SEM results of the fracture surface of the 4Ëš and 13Ëš testing angles of ASTM A36 steel showed striation and microvoid coalescence and crack propagation indicating that the fatigue failure that occurred was ductile fracture. Based on the conclusions obtained, it shows that the number of cycles is influenced by the testing stress, which means that at high stresses, the life time of the pressure vessel will be smaller and vice versa.
Co-Authors Abdi, Jusran Amir Arifin Astuti - Azhari, Ikbal Dewi Puspitasari Diah Kusuma Pratiwi Eka Utami, Nurhabibah Paramitha Ellyanie Ellyanie Gunawan Gunawan Gustini, Gustini Hasan Basri Kaprawi Kaprawi Marwani Marwani, Marwani Nurhabibah Paramitha Eka Utami Ozkar F. Homzah, Ozkar F. Prakoso, Akbar Teguh Putra, Dicky Pratama Rafli Fazal, Muhammad Ramadhoni, Tri Satya Riman Sipahutar Romli Romli, Romli Sampurno, Rachmat Dwi Saputra, M. A. Ade Tumpal Ojahan Rajagukguk Utama Putra, Risky Utami, Nurhabibah Paramitha Eka Yogi Saputra Zulkarnain, Rizki