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All Journal Sprocket : Journal of Mechanical Engineering Jurnal Visi Eksakta
Yetty Riris Saragi
Universitas HKBP Nommensen
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Journal : Sprocket : Journal of Mechanical Engineering

 1 
Pengamatan Atas Daerah Interface Pada Cladding Material Stainless Steel Terhadap Baja Karbon Rendah Secara Metalografi dan Uji Keras Yohanes Hutahaean; Sahat Mauli Lubis; Charles Manurung; Salomo Simanjuntak; Yetty R Saragi
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 2 No 2 (2021): Edisi Februari 2021
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (365.197 KB) | DOI: 10.36655/sproket.v2i2.527

Abstract

Low carbon steel metal is a type of steel that has poor corrosion resistance. For that it is necessary to protect against corrosion through a coating process. In this case the coating is carried out using solid metal and is known as cladding. In this cladding process using another metal as a coating medium, namely stainless steel, the specimen will be given additional deformation from the outside in the form of pressure and the heating process is carried out above the recrystallization temperature (950oC) then cooled slowly in free air. The heating process of the specimens was carried out with three temperature variations, namely 750oC, 850oC and 950oC with a holding time of 60 minutes, from the research results obtained that the specimens and the highest temperature, 950 oC, had better metal bonds compared to specimens at temperatures of 750 and 850oC with hardness values. average 227.96 VHN.
Analisa Karakteristik Getaran Pada Mesin Asphalt Mixing Plant Tipe Apollo ANP- 1500 Berdasarkan Kapasitas Pembuatan Aspal Jalan Pada Daerah Horizontal, Vertikal Dan Longitudinal Berdasarkan Time Domain Suriady Sihombing; Wilson Nababan; Ros Anita Sidabutar; Yetty Riris Saragi; Partahi Lumbangaol; Salomo Simanjuntak
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 3 No 1 (2021): Edisi Agustus 2021
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (264.267 KB) | DOI: 10.36655/sprocket.v3i1.567

Abstract

Asphalt mixing plant machine is a tool used to process several materials into road asphalt, where it is necessary to know how to analyze the vibration characteristics of the asphalt mixing plant machine based on the capacity of making asphalt road in horizontal, vertical and longitudinal areas based on the time domain. The research method is carried out by collecting data on the amount of deviation, speed and acceleration that arise due to the processing of several materials so as to produce road asphalt based on differences in the capacity of different asphalt processed. Based on the measurement results, it is found that the highest vibration occurs at the asphalt mixing plant machine seat for a capacity of 60 tons/hour where the magnitude of the deviation is 0.222 mm in the horizontal direction at 100 seconds, the largest velocity is 11.99 mm/s horizontally in the second 40 mm/s and the largest acceleration is 369.7 mm/s2 in the horizontal direction of the 20th second. According to the ISO IS 2372 standard, the vibration of the Apollo ANP-1500 asphalt mixing plant machine enters class IV with a generator capacity above 75 KW, to be more precise (150KVA = 120KW). Then it can be analyzed that the generator vibration falls into the category of "vibration within tolerance limits and is only operated for a limited time" where the highest speed is 11.99 mm/s.
Korelasi Nilai Hambatan Konus Terhadap Parameter Rembesan Dalam Aplikasinya Pada Dinding Penahan Tanah Yetty Saragi; Riski Bernandus; Ros Anita Sidabutar
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 4 No 2 (2023): Edisi Februari 2023
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v4i2.916

Abstract

Retaining walls are one of the constructions that are often found as slope safety walls which function to withstand lateral forces from the soil behind them. Retaining walls must be able to withstand shear, overturn, bearing capacity and meet the provisions of SNI 8460 2017 Geotechnical Design Requirements. The retaining wall must also be able to withstand water seepage into the soil behind it so it is necessary to know the amount of the seepage coefficient (k). The value of the seepage coefficient (k) can be determined from the Constant Head and Falling Head laboratory tests as well as by using the correlation from the results of the CPT Cone Penetration Test (which was used in this study). The CPT test was carried out at 4 stations that had experienced slope failure. Furthermore, this study designed a retaining wall in the landslide area by taking into account the magnitude of the seepage coefficient (k). From the four CPT points, the seepage coefficient values were obtained k1 = 1.06E-05 cm/sec, k2 = 5.79E-06 cm/sec, k3 = 6.77E-06 cm/sec and k4 = 6.46E-06 cm/sec. Taking into account the presence of water seepage behind the retaining wall, it is obtained that FK 1.65 still does not meet FK under conditions of high levels of uncertainty and large repair costs (FK requirements > 2.0 according to SNI 8460 2017). From this study, it was found that by calculating the seepage coefficient (k), the FK value was not sufficient and it was suggested that in its implementation, efforts to compact the soil layer by layer behind the wall were needed so that the soil behind the wall was quite dense.
Co-Authors Arnita Silaban Bartholomeus Charles Manurung Eben Oktavianus Zai Humisar Pasaribu Johan Oberlyn Simanjuntak Lumbangaol, Partahi Maruli Pardede Masati Harefa Ricki A H Sianipar Riski Bernandus Ros Anita Sidabutar Ros Anita Sidabutar Ros Anita Sidabutar Sahat Mauli Lubis Salomo Simanjuntak Salomo Simanjuntak Sriyanti Sitorus Suriady Sihombing Tiurma Elita Saragi Torang Hutabarat Wilson Nababan Yohanes Hutahaean