Article Per Year (5 Year)
p-Index From 2020 - 2025
0.562
P-Index
This Author published in this journals
All Journal Jurnal Teknik Mesin Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin Jurnal Karya Pengabdian Teknik Mesin Semeton Mathematics Journal
Emmy Dyah Sulistyowati, Emmy Dyah
Unknown Affiliation
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Energy Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Physics

Published : 10 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 10 Documents
Search

 1 
PEMANFAATAN LIMBAH SiC UNTUK MEMPERBAIKI KEKUATAN IMPAK ALUMINIUM SCRAP DAN STRUKTUR MIKRONYA DENGAN METODE SINTERING Salman, salman Salman; Sulistyowati, Emmy Dyah; Humaidi, Achmad Humaidi
Jurnal Teknik Mesin ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ(Journal Of Mechanical Engineering) Vol 8, No 1 (2019)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v8i1.4882

Abstract

Abstrak-- Penelitian ini bertujuan mengetahui pengaruh penambahan limbah silikon karbida (SiC) pada aluminium scrap (Al-scrap) terhadap ketangguhan impak dan setruktur mikro dengan metode metalugi serbuk (sintering). Material yang digunakan pada penelitian ini adalah Al-scrap dan SiC. Ada tiga variasi campuran yaitu campuran cetakan masing-masing 0, 10 dan 20 % SiC. Pemanasan dilakukan selama 3 jam dan suhu 500 Co. Pengujian yang dilakukan adalah pengujian impak dan pengamatan struktur mikro.            Hasil penelitian menunjukan bahwa variasi dari penambahan SiC mempengaruhi kekuatan impak bahan. Penambahan SiC 20 % pada penelitian ini menghasilkan kekuatan impak yang paling tinggi sebesar 13.078 x 10-3 J/mm². Sedangkan Al-scrap tanpa penambahan SiC adalah 11.98 x 10-3 J/mm². Katakunci: SiC, Al-scrap, Sintering, Ketangguhan impak Abstract-- The study aims is to determine the effect of the additional of the silicon carbide (SiC) disposal to the aluminum scrap (Al-scrap) over the impact strength and microstructure by sintering method. The materials used in this study were Al-scrap and silicon carbide (SiC). There were three mixed variations, they were 0, 10 and 20% SiC. The specimens were heated for 3 hours at the temperature of 500 Co. The tests carried out were impact testing and microstructure observation. The results showed that the variations in the addition of SiC affected the value of the impact strength of the material. The addition of 20% SiC in this study resulted in the highest impact toughness of 13,08 x 10-3 J / mm². Whereas Al-scrap without the addition of SiC was 11.98 x 10-3 J / mm². Keywords: SiC, Al-scrap, Sintering, Impact toughness
PENGARUH PANJANG SERAT DAN FRAKSI VOLUME TERHADAP KEKUATAN IMPACT DAN BENDING MATERIAL KOMPOSIT POLYESTER- FIBER GLASS DAN POLYESTER-PANDAN WANGI Sulistyowati, Emmy Dyah; Sari, Nasmi Herlina; Yudhyadi, IGNK; Sinarep, S.; Topan, T.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 2, No 1 (2012): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4288.132 KB)

Abstract

At this research by using two kinds of composite that is composite of fibre of screw pine of fragrant and composite of glass fibre. And in doing research will be done by two examination type that is test the strength bending and test the strength impact. How strength from two composite type of examinee with the long variation  and fibre volume to be used.As the result test the strength of impact and bending to be composite of screw pine of fragrant with the long variation of fibre with the random fibre direction that composite highest strength impact of fibre of screw pine of fragrant got at fibre length 5 cm of equal to 2286,67 singk / m². while for the variation  of volume of highest strength impact fibre there are at fibre volume 40% with the unidirectional fibre direction equal to 2940 Kj / m². While to result of composite strength bending test of screw pine of fragrant got by biggest strength bending with the long variation of fibre with the direction of fibre random, gotten at fibre length 5 cm of equal to 146,67 KN . while for the strength of bending with the variation of fibre volume with the unidirectional fibre direction, highest strength bending got at fibre volume 40% equal to 236,67 KN. Medium to result of composite strength impact test of glass fibre at long variation of highest strength fibre got at length seart 5 cm of equal to 5553,33 Kj / m². While strength impact with the variation of biggest strength fibre volume at fibre volume 40% with the unidirectional fibre direction equal to 15908,67 Kj / m². Medium at composite strength bending test of glass fibre with the long variation of fibre  where fibre direction is random of biggest kerkutan bending at fibre length 5 cm of equal to 263,33 KN. while to result of kekutan bending  at variation  of fibre volume got by biggest strength bending at fibre volume 40% equal to 278,34 KN.
ANALISIS SIFAT KEKUATAN TARIK DAN KEKUATAN BENDING KOMPOSIT HIBRYD SERAT LIDAH MERTUA DAN KARUNG GONI DENGAN FILLER ABU SEKAM PADI 5% BERMATRIK EPOXY Muslim, Jauhari; Sari, Nasmi Herlina; Sulistyowati, Emmy Dyah
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 3, No 1 (2013): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.471 KB)

Abstract

Abstract The use of composite materials is growing at over the development of manufacturing industry. Composites sansevieria and hibiscus canabinus with the addition of rice husk ash filler. The purpose of this study was to analyze the tensile strength and bending strength of hybrid composites sansevieria and hybiscus canabinus with rice husk ash filler epoxy bermatrik with random fiber direction.Variation of fiber volume fraction sansevieria and hybicus canabinus is 0%:35%,10%:25%, 15%:10%, 20%:15%, 25%:10%, 35%:0%. Method for making composite specimens in the form of hand lay up with a fiber length of 2cm. Testing was done by bending test following the ASTM standard D790 tensile test and ASTM D3039 standards.The results showed that the composites with rice husk ash fillers higher bending strength and the strength of its appeal compared to the composite without using rice husk ash fillers, where the highest bending strength on volume fraction 0%/35% as big as 32,00 MPa (using filler), and kekutan lowest bending the volume fraction 0%/35% as big as 21, 69 Mpa (without filler). While the tensile test has the highest power in the volume fraction 15%/20% as big as 8,24 MPa (using filler), and the lowest tensile strength on volume fraction 0%/35%  as big as 3,43 MPa (without filler).
EFFECT OF TUBE DIAMETER AND SURFACE ROUGHNESS ON FLUID FLOW FRICTION FACTOR Mirmanto, M.; Yudhyadi, IGNK; Sulistyowati, Emmy Dyah
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 4, No 2 (2014): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (616.558 KB)

Abstract

Experiments have been performed to investigate the effect of channel roughness and diameter on fluid friction. Three different diameters and roughness of tubes were used to examine the friction factor. The first tube made of stainless steel with an inner diameter of 1.14 mm was investigated at Brunel University, whilst the others made of PVC with diameters of 17 mm and 15.5 mm rough were tested at Mataram University. The stainless steel was equipped with a 200 mm calming section and smooth one. The 15.5 mm diameter tube was coated internally with sand that had an average grain size of 0.5 mm so that the tube had a relative roughness of 0.032.  The last tube with a diameter of 17 mm was smooth as explained  in the H408 Fluid Friction Experimental Apparatus manual.            The results indicate that the flow in the stainless steel tube still obeys the theory and in the 17 mm tube shows a deviation in friction factor with the theory. However, this was due to no calming section installed in the test rig. Flow in the rough tube (15.5 mm diameter) demonstrates that the Reynolds number does not affect the friction factor in turbulent regimes and the experimental friction factors were reasonably in a good agreement with the theory or Moody diagram. Hence, the effect of decreasing in diameter of channels on friction factor is insignificant.
Pembuatan mesin uji tarik kapasitas kecil: bagian data akuisisi Pandiatmi, Pandri; Okariawan, IDK; Sulistyowati, Emmy Dyah; Salman, S.; Adhi, IG.A.K. Chatur
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 7, No 1 (2017): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (549.502 KB) | DOI: 10.29303/dtm.v7i1.6

Abstract

For the purposes of practicum and student research in the field of materials, tensile test equipment is very important. But the test equipment that is in the Department of Mechanical Engineering, University of Mataram has a very large capacity so it is not suitable for testing materials such as plastics and composites so this study bertujuann to make small capacity tensile testing machine for purposes of practicum and student research in the field of polymer materials and composites. Due to limited funds, the research is focused on making data acquisition tensile testing machine. Necessary materials are on site, cable, lead solder, lacquers cable socket and supported by laboratory equipment mechanical engineering majors who have been there, but some of the components to be purchased as load cell, electronic extensometer, and the operational amplifier module arduino uno boad. Design data acquisition consists of a sensor that is load cell, extensometer electronic, signal conditioning is an operational amplifier that is arduino uno data recording boad connected with the personal computer and data processing using LabView software so that the output of the data acquisition is in the form of tables and graphs. With their small capacity tensile testing machine is expected to provide an additional means of learning in the laboratory and student research.
PENGARUH KADAR AIR AWAL KAYU JATI DAN SUHU CURING PEREKAT PADA KEKUATAN GESER SAMBUNGAN KAYU JATI (TECTONA GRANDIS) SECARA PEREKATAN Sugiman, Sugiman; Hayyi Nu’man, Abdul; Sulistyowati, Emmy Dyah
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 4, No 2 (2014): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (187.625 KB) | DOI: 10.29303/dtm.v4i2.58

Abstract

Adhesively wood-wood bonded joint has been widely used in structural applications, however because wood is a hygroscopic material that absorbed water from environment, hence the absorbed water affects the joints performance. The objective of the paper is to investigate water absorbtion and desorbtion behaviour and the combined effect of absorbed water into the wood before being bonded and adhesive curing temperature on the shear strength of teak wood joints. The initial water content in the wood was 0%, 37%, and 54%, while the curing temperature was a  room temperature for 24 hours, 50°C for 6 hours, and 100°C for 3 hours. The water absorbtion behaviour of teak wood deviate from the Fick's law, however the desorbtion tends to follow the Fick's law. Moreover the rate of absorbtion is higher than the rate of desorbtion. At the same curing temperature, the increase of water content decreases the shear strength of the joints; however the decrease was compensated by increasing the curing temperature. Curing at a high temperature (100 oC) improves the joints strength in all moisture content studied and the failure of the joints occurs at the wood.
UJI FASTENING PADA KAYU KOMPOSIT SERAT PANDAN WANGI DAN LIMBAH KAYU DENGAN RESIN POLYESTER Sulistyowati, Emmy Dyah; Sari, Nasmi Herlina; Sinarep, S.; Pandiatmi, Pandri; Andrian, Insan
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 5, No 1 (2015): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (196.337 KB)

Abstract

The purpose of this study was to obtain handling connection type in use as door panels, roofing sheets, walls and floors. Therefore, the tests performed are fastening test and abrasion test. The technique of making wood composite is using hand lay-up technique. Constituent material of board composite is using pandanwangifibers with length variationsare 15 mm, 20 mm, and 30 mm with volume fraction variations are 20% and 30%, and 5% Sengon tree saw-dust is used as the filler. The results showed that pre-drilling with fastener sizes # 6, # 8 and # 10 is 3.5 mm, 4 mm and 4,5mm. The distance between each fastener depends on the fastener head itself, ie fastener # 6, # 8, and # 10. Critical distance between the edge of the fastener has a significant effect on fiber length and volume fraction. The highest value is shown on 15 mm of the fiber length and 20% of volume fraction with the value 3.29 mm, and the lowest value is shown on 15 mm of the fiber length and 30% of volume fraction with the value 2.74 mm. 
ANALISIS SIFAT PENYERAPAN AIR DAN INDEKS NYALA API PADA PAPAN KOMPOSIT YANG DI PERKUAT SERAT DAUN PANDAN DURI DAN LIMBAH SERBUK GERGAJI KAYU SENGON DENGAN RESIN POLYESTER Bachtiar, Saiful; Sulistyowati, Emmy Dyah; Catur, Agus Dwi
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 5, No 2 (2015): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (273.961 KB)

Abstract

The use of composite materials as an alternative to metallic materials in the field of engineering more widespread, not only as an interior daneksterior in the automotive field but also extended to other areas such as property and architecture is to reduce the incidence of fire one only to find a replacement for wood as a raw material of houses and buildings with other alternative materials are more fire resistant, the material need not be limited in mechanical strength, but also on the physical properties. Therefore, the aim of this study was to analyze the absorption properties of water and fire index in the fiber-reinforced composite board pandanus leaves thorns and wood sawdust filler sengon with polyester resin as matriknya.Analysis of the absorption properties of the water carried by the ASTM D 5529 with a variation of the length of time of immersion (10, 20, and 30 days) and the fiber volume fraction (0%, 10%, 20% and 30%). Testing index of the flame using ASTM E1321 with long burning time of 10 minutes. To test the effect of soaking time and a fiber volume fraction of the weight gain, volume, and density on the board fiber composite pandanus thorns with 10% filler wood sawdust sengon diguanakn Two Ways Analysis Of Variance, and the effect of fiber volume fraction to index Flash Fire is used One Ways Analysis Of Variance.The results showed that the water absorption is affected by fiber volume fraction and longer soaking time. The largest percentage of water absorption occurs in the volume fraction of 30% with long soaking time of 30 days is 24.41%. Similarly, the highest percentage swelling occurs in composite board with a volume fraction of 30% with a 30-day long soaking time is 11:22% .Then the flame to the percentage of the index without fiber composite board has a greater percentage is 167.03%. By contrast the percentage of board composite index gained shortest of composite board with a fiber volume fraction of 30% ie 70.25% composite board with a fiber volume fraction of 30% also have a flame index is lower than the comparison is with wood composites sengon.
Sosialisasi dan Penerapan Ergonomi untuk Keselamatan dan Kesehatan Kerja di UD, Samuni Gunung Sari Triadi, Anak Agung Alit; Sulistyowati, Emmy Dyah; Wijana, Made; Nuarsa, I Made; Pradityatama, Maharsa
JURNAL KARYA PENGABDIAN Vol. 7 No. 1 (2025): April, Jurnal Karya Pengabdian
Publisher : Jurusan Teknik Mesin FT Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jkp.v7i1.208

Abstract

Sosialisasi dan Penerapan Ergonomi untuk Keselamatan, Kesehatan Kerja (K3) bekerjasama dengan Mitra UKM yaitu UD. Samuni dengan sasaran intinya adalah karyawan dan pemilik usaha. Berdasarkan hasil pendahuluan dengan cara observasi diketahui bahwa pengrajin mebel beruga kayu bekerja dalam sikap kerja yang statis. Pekerja juga mempunyai karakteristik yang berbeda seperti jenis kelamin, usia dan masa kerja yang memungkinkan adanya kelelahan setelah bekerja. Selama bekerja, para perajin tidak menggunakan alat keselamatan diri. Berdasarkan kondisi seperti ini perlu dilakukan sosialisasi konsep kerja ergonomi serta pemanfaatan alat keselamatan diri sehingga program K3 di mitra terealisasi. Kegiatan penyuluhan dan demonstrasi di lokasi mitra berlangsung selama 1 hari dengan melibatkan seluruh karyawan dan pemilik usaha. Materi yang diberikan yaitu pengenalan konsep kerja ergonomi (posisi, waktu dan gerak) dan pengenalan alat pendukung keselamatan dan kkesehatan kerja, fungsi, dan cara menggunakan secara benar. Alat keselamatan diri seperti helm, sarung tangan, kaca mata, masker, alat pelingdung telinga dan sepatu. Kuisioner di awal dan akhir penyuluhan akan memberikan gambaran bagaimana perubahan tingkat kesadaran karyawan terhadap keamanan dan keselamatan. Hasil dari kegiatan pengabdian ini adalah minimal 80% karyawan mau sadar dan menerapkan konsep kerja ergonomi serta menggunakan alat pelindung keselamatan secara rutin sehingga mampu menunjang pelaksanaan penerapan K3 di tempat kerja. Mitra akhirnya memahami bahwa bekerja secara benar akan membantu mereka bekerja secara sehat, efektif dan efisien. Dapat disimpulkan bahwa kegiatan pengabdian ini terlaksana dengan baik dan mitra sangat antusias berinteraksi serta bersifat terbuka menerima transfer iptek dari tim. Keselamatan dan kesehatan kerja menjadi hal yang prioritas untuk menjaga kelangsungan usaha mitra.
Pengendalian Kualitas Produk Spon Kasur Menggunakan Exponentially Weighted Moving Average (Ewma) pada UD. Celcius Gegutu Timur Lingking, Fransiska Prisilia; Harsyiah, Lisa; Sulistyowati, Emmy Dyah; Asri, Adis Tia Juli Agil
Semeton Mathematics Journal Vol 2 No 1 (2025): April
Publisher : Program Studi Matematika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/smj.v2i1.273

Abstract

Problems that arise at UD. Celsius, one of the manufacturers of sponge mattress products in the East Gegutu area, said that differences in product weight will cause a decrease in product quality. Consequently, here, quality is of primary concern. Because the Exponentially Weighted Moving Average (EWMA) control chart can detect small average changes, this study aims to examine the quality control of mattress sponge products using this chart. The information used relates to the mass of a mattress sponge product measuring 160×120×25 cm, with four variables, namely X_1,X_2,X_3 and X_4, Quality control in this research uses a weighting factor value of  = 0.4. Based on the research results, the assumption that is not fulfilled is the assumption of data randomness, so that the EWMA control chart pattern formed shows that the data is not statistically controlled. However, there is no data that is out of control, so in this study the Average Run Length (ARL) value of 27,204 indicates that there will be data that is first out of control, namely the 27th or 28th data. And the results of the capability analysis of the process show that the production process is not capable because the values of Cp=0.3432 and Cpk=0.3373 where the values of Cp,Cpk<1, this is due to the influencing factors, namely man, machine, material and method factors.
Co-Authors Abdul Hayyi Nu’man, Abdul Hayyi Agus Dwi Catur Asri, Adis Tia Juli Agil Harsyiah, Lisa Hayyi Nu’man, Abdul Humaidi, Achmad Humaidi I G.A.K Chatur Adhi W.A. I Made Nuarsa, I Made IDK Okariawan, IDK IGNK Yudhyadi Insan Andrian, Insan Jauhari Muslim, Jauhari Lingking, Fransiska Prisilia M. Mirmanto, M. M. Wirya Dirjan, M. Wirya Made Wijana, Made Nasmi Herlina Sari Pandri Pandiatmi Pnadri Pandiatmi, Pnadri Pradityatama, Maharsa S Sugiman, S S. Salman, S. S. Sinarep, S. Saiful Bachtiar, Saiful Salman, salman Salman Sugiman Sugiman T. Topan, T. Triadi, Anak Agung Alit