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All Journal Jurnal Spektran Jurnal Energi Dan Manufaktur Rekayasa Mesin Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) Jurnal Teknik Mesin R.E.M (Rekyasa Energi Manufaktur) Jurnal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Indonesian Journal of Chemistry Machine : Jurnal Teknik Mesin Jurnal Agrotek UMMat Journal of Applied Agricultural Science and Technology Jurnal Pengabdian Magister Pendidikan IPA Jurnal Abdi Insani Jurnal Mesin Nusantara Journal of Fibers and Polymer Composites Jurnal Karya Pengabdian Teknik Mesin Protech Biosystems Journal Indonesian Journal of Forestry Research
Nasmi Herlina Sari
Jurusan Teknik Mesin, Fakultas Teknik Universitas Mataram
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Transportation

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Bio Based Composites for Engineering Application and Sustainability Perspectives Sari, Nasmi Herlina; Rivlan, Muhammad Nabil Fadhlurrohman
Journal of Fibers and Polymer Composites Vol. 4 No. 2 (2025): Journal of Fibers and Polymer Composites
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jfpc.v4i2.493

Abstract

Type of the Paper: Editorial Corner
PENGARUH PREHEAT DAN TEMPERING TERHADAP KEKERASAN DAN STRUKTUR MIKRO HASIL PENGELASAN BAJA JIS SS 400 Askar, Saiful; Sinarep, S.; Sari, Nasmi Herlina
Dinamika Teknik Mesin Vol 3, No 1 (2013): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

JIS steel SS 400 is one of the most common types of steel used for hot rolling steel structures general. This steel is excellented to the weldability and machinability properties. This study aimed to determine the effect of heat treatment with preheating without tempering (PTT), with preheating and tempering (PT), without preheating and without tempering (TPTT), and  without preheating tempering (TPT). The test results are then compared with the raw material specimens. Method of forming specimens using welding SMAW (Shielded Metal Arc Welding) DC reverse polarity using E7018 type electrode diameter of 4 mm. Type of seam used is V open seam with slit width and height of 2 mm and the width of the root angle 70o. This studied used a low alloy steel (JIS steel SS 400) which contain high levels of 0.20% C, maximum 0.005% S, maximum 0.005% P with repetitions each variation three times. Tests conducted it has testing the tensile strength, brinell hardness testing, and microstructure photo shoot. Value of the brinell hardness of welded joints highest in the tempering specimens without preheating, amounting with  163,911 HB hardness value. The structure of cementite and pearlite formed. While the lowest hardness values of specimens owned by raw material is 120,498 HB hardness values that form the microstructure of pearlite and ferrite. 
Pengaruh Panjang Serat Dan Fraksi Volume Serat Pelepah Kelapa Terhadap Ketangguhan Impact Komposit Polyester Sari, Nasmi Herlina; Zainuri, Achmad; Wahyu, Fitratul
Dinamika Teknik Mesin Vol 1, No 2 (2011): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

Composite has alone top to be compared with alternative's tech material any other as strong, demulcent, bate corrosion, economic etcetera.  The aim of this research is to investigate the influence of fiber length and fiber volume composition coconut frond to tensile strength step-up and toughness impact composite is coconut frond fiber with matrix resin   polyester   This research utilizes fiber length variation 2 cm, 4 cm, 6 cm and fiber volume variations 5%, 10%, 15%. composite lasing utilizes resin polyester  composite makings done at random with fiber compare and resin 100%. Fiber conduct is done with soak fiber up to 1 hour with NaOH solution as much 4%. composite makings process by method hand lay up  with emphasis manually utilize glass as printed as and depressing.   That result showed for fiber length 2 cm, 4 cm, and 6 cm gotten by supreme tensile strengths on long fiber 6 cm which is 27.5503216 N/mm2 and tensile strength is contemned available on fiber length 2 cm which is 16.80040936 N/mm2  and on fiber volume 5%,10%, and 15% supreme tensile strengths on volume fiber 15%, which is 28.49020468 N/mm2 and tensile strength is contemned available on volume 5%, which is 16.80040936 N/mm2. Toughness impact  supreme for fiber length 2 cm, 4 cm, and 6 cm happens on fiber length 2 cm with volume variation 10% which is 4087.5 Kj/m2 and on fiber volume 5%,10%, and 15% gotten by toughness impact  supreme available on volume 10% with longing fiber 6 cm which is, 4087. 5 Kj/m2
PEMANFAATAN SERBUK TEMPURUNG KELAPA PADA KOMPOSIT Al2O3-EPOXY Syafruddin Zohri, Ahmad; Sari, Nasmi Herlina; Sujita, S.
Dinamika Teknik Mesin Vol 3, No 2 (2013): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

The purpose of this research is utilization of coconut shell powder on Al2O3-Epoxy composite so it can be used as an alternative material of brake linings that are enviromentlly friendly. In this research, coconut shell powder is used as a filler on Al2O3-Epoxy composites that are made using hand lay up method. Comparison volume fraction of coconut shell powder and Al2O3 was varied amount 0:40, 10:30, 20:20, 30:10 and 40:0 (%). Adhesive was used is epoxy resin namely amount 60%. Test conducted is wear test. The results showed that utilization of coconut shell powder on Al2O3-Epoxy can be decrease the wear so it can be used as an alternative material of brake linings that are environmentally friendly
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 Vol 2, No 1 (2012): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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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.
ANALISA KEKUATAN BENDING KOMPOSIT EPOXY DENGAN PENGUATAN SERAT NILON Sari, Nasmi Herlina; Sinarep, S.
Dinamika Teknik Mesin Vol 1, No 1 (2011): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

The development of composite materials in the field of engineering is increasingly being used. This is because of its properties are superior compared to conventional materials, as the ratio between strength and density are quite high, stiff, the manufacturing process is very simple and resistant to corrosion and fatigue loads. The purpose of this study was to determine the effect the addition of nylon fibers with Epoxy Matrix on the increase in bending strength of epoxy composites.  The objected of this study was the composite of nylon fiber, which is cut 12 mm nylon fiber with epoxy resin as a fastening material. Before performing an experiment testing the tensile fibers has done and known to the stress of 461.22 MPa. There are 3 variations of volume fraction In this experiment, those are volume fraction of 40%, 50%  and  60%, with 3 variation each.  Method in the manufacture of specimens with the way the mould press. Tools to test the specimen is bending test machine (servopulser). Specimens using a standard test of ASTM C 393-94. Bending test results showed that the nylon fiber composite with fiber volume fraction 40% stress of 787.16 MPa, modulus of elasticity of 1.06 GPa, volume fraction of 50% the stress of 902.01 MPa, modulus of elasticity of 1.08 GPa, and for 60% volume fraction of the stress of 950.02 MPa, modulus of elasticity of 0.99 GPa.
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 Vol 3, No 1 (2013): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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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).
Extraction and isolation of microcellulose from nunang tree (cordia dichotoma) stem fibers Suteja, Suteja; Sari, Nasmi Herlina; Pradityatama, Maharsa
Jurnal Agrotek Ummat Vol 12, No 4 (2025): Jurnal Agrotek Ummat: Oktober
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jau.v12i4.35596

Abstract

Mikro serat (holoselulosa) dari serat batang pohon nunang memiliki karakteristik mekanik, ketahanan panas yang baik dan densitas ringan sehingga cocok untuk material kemasan hasil pertanian (biokomposit). Lembaran serat nunang diperoleh dengan merendam kulit batang nunang dalam air dan dipotong ±1 cm untuk diblender, dan dilanjutkan proses pengayakan 40 mesh. Serat makro nunang kemudian diputihkan dengan larutan NaClO2 5% dan dimerserisasi dengan larutan NaOH 9% pada suhu 65 °C dan kecepatan 500 rpm selama 2 jam di atas magnetic stirrer. Hasil uji FTIR mengungkapkan telah hilangnya serapan pada bilangan gelombang 2026–1698 cm-1 yang merupakan indikasi hilangnya senyawa lignin, hemiselulosa, lilin dan senyawa pengotor lainnya. Pengujian difraksi sinar-X (XRD) menunjukkan niilai indeks kekristalan yang lebih tinggi setelah perlakuan kimia NaClO2 dan NaOH, sementara itu pengamatan foto SEM menunjukkan fitur permukaan yang lebih kasar sebagai tanda larutnya material pengotor. Setelah perlakuan kimia serat mikro juga mengindikasikan ketahanan termal yang lebih tinggi. Penelitian ini menunjukkan bahwa serat mikro nunang setelah perlakuan kimia memiliki potensi untuk industri kemasan hasil pertanian seperti film transparan ataupun bioplastik.
PELATIHAN MEMBUAT ECOBRICK UNTUK GENERASI MUDA DALAM MENINGKATKAN KEPEDULIAN KEBERSIHAN LINGKUNGAN DI PEDESAAN Hidayatullah, Syarif; Suteja, Suteja; Huda, Ahmad Akromul; Sari, Nasmi Herlina; Tawaqqal, Akbar
Jurnal Abdi Insani Vol 12 No 10 (2025): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v12i10.2872

Abstract

The issue of plastic waste in rural communities has become an urgent environmental concern due to limited waste management facilities and low public awareness of the impacts of plastic pollution. The massive use of plastics without proper disposal systems has led to the accumulation of waste that contaminates the environment. One practical and educational solution that can be implemented is the production of ecobricks, which involves processing plastic waste into environmentally friendly building materials. This activity aimed to enhance the knowledge, awareness, and skills of young people aged 10–16 years in Ambung Village, East Masbagik District, in managing plastic waste through ecobrick-making training. The implementation method consisted of three stages: socialization, training, and evaluation. The socialization stage involved an interactive lecture on the dangers of plastic waste, followed by hands-on practice in making ecobricks using used plastic bottles. Evaluation was conducted using pre-test and post-test instruments to measure participants’ understanding of the reduce, reuse, recycle (3R) concept. The results showed a significant increase in participants’ knowledge levels, with an average pre-test score of 51.5 and a post-test score of 84.5, representing an improvement of 63.4%. Participants gained a better understanding of plastic waste management processes, were able to produce ecobricks independently, and were motivated to apply this knowledge at home while encouraging family members and peers to participate. Moreover, the activity fostered a sense of collaboration and creativity among participants by transforming plastic waste into functional products such as flower pots and garden benches. It can be concluded that ecobrick-making training effectively increased ecological awareness, knowledge, and practical skills among young people in plastic waste management, serving as an initial step toward a cleaner and more sustainable village environment.
Peningkatan Pemahaman Cara Kerja Solarcell Dan Pemanfaatan Energi Matahari Untuk Penerangan di SMKN 1 Selong Kabupaten Lombok Timur NTB Mulyanto, Arif; Herlina Sari, Nasmi; Syahrul; Sinarep; Lalu Wahyu Alam
JURNAL KARYA PENGABDIAN Vol. 7 No. 2 (2025): Oktober, Jurnal Karya Pengabdian
Publisher : Jurusan Teknik Mesin FT Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jkp.v7i2.210

Abstract

Electricity has become an inseparable part of life's necessities along with the rapid development of technology, industry and information. The reduction in fossil energy sources and increasing awareness of preserving the environment requires us to look for alternative energy from renewable energy sources. The use of solar energy as a renewable energy source in NTB has not been widely used. This counseling was carried out at SMKN 1 Selong with the aim of introducing solar energy. Solar energy produced by solar panels is converted into electricity. Electricity is stored by the battery through a charging regulator (SCC). The battery can be used to power AC lights using an inverter. The length of use time depends on the amount of lamp power and battery power. Maintenance carried out regularly: 1. Clean the solar panels from dust or dirt. 2. Check the battery water level. Work safety is highly recommended when carrying out maintenance by turning off the MCB switch while the solar panels are being maintained.
Co-Authors Achmad - Zainuri Achmad Zainuri Achmad Zainuri Agil Trieanto Agus Dwi Catur Agus Dwi Catur Ahmad Safii Ahmad Syafruddin Zohri, Ahmad Ahmad Syafruddin Zohri, Ahmad Syafruddin Ahmad Taufan Ainun Asmawati Anindito Purnowidodo Anindya Aisyatur Amini Apriandi, M. Irawan Arif Mulyanto Arif Mulyanto, Arif Arif Surya Darmawan D.P Arif Surya Darmawan, Arif Surya Arya Muliana Baiq Elmaliana Baiq Tasya Carrisa Denda Ayu Febriani Riaz Putri Dewa Gede Pertama Putra Dewa Gede Pertama Putra, Dewa Gede Pertama Dhea Amalia Didit Yudhanto Difa Salsabila Fakhrunnisa Dimas Juniarto Dina Muliyani Djarot B. Darmadi, Djarot B. Dwi Setyawan Edi Syafri Emmy dyah S Emmy Dyah Sulistyawati, Emmy Dyah Emmy Dyah Sulistyowati Emmy Dyah Sulistyowati Emmy Dyah Sulistyowati Emmy Dyah Sulistyowati, Emmy Dyah Evelyn Carolina Sentosa Fitratul Wahyu, Fitratul Fitri Febrianti Fitriah H. Harsi, H. Herlinasari, Nasmi Hidayatulah, Syarif Huda, Ahmad Akromul Huriyani I Gede Widiartha I Gede Widiartha, I Gede I Gusti Bagus Indra Permana I Kade Wiratama I Made Wirawan I Putu Krishna Artha Sastra I Putu Krishna Artha Sastra, I Putu Krishna Artha I.D.K. Okariawan IDK Okariawan, IDK IGNK Yudhyadi IGNK. Yudhyadi Insan Andrian, Insan Jauhar Fajrin Jauhar Fajrin Jauhari Muslim, Jauhari Kadriyan, Hamsu Karyanik, Karyanik Khan, Moonish Ali Kiki Dewanti Lalu Abdurrahman Wahid Lalu Tumbuh Prasetya Lalu Wahyu Alam Ludia Margrith Suseray M. Wirya Dirjan M. Wirya Dirjan, M. Wirya Maharsa Pradityatama Maryam Soleha Bahar Muhammad Ali Azmi Muhammad Edi Nasution Muhammad Rama Setiyadi Muhammad Subbanul Mujahiddin Muhammad Zaidan Fadhlurrahman Rivlan N. Nurchayati Namira Risqi Putri Muquita Nur Kaliwantoro Nurhasanah Nurhasanah Nurrochman Hartadi Dasrien Pandri Pandiatmi Pandri Pandiatmi Panji Saputra Anggara Paryanto Dwi Setyawan Pnadri Pandiatmi, Pnadri Putu Lokantara R.C. Lelio Retno Setyowati, Ety Risa Wardani Rivlan, Muhammad Nabil Fadhlurrohman Rivlan, Muhammad Zaidan Fadhlurrohman Rozan Hermansyah Rudy Sutanto S Sinarep, S S Sujita, S S. Sinarep, S. Saiful Askar, Saiful Salman Salman Salman Sanjay Mavinkere Rangappa Sari, Suteja Sinarep Sinarep - Sinarep Sinarep Sinarep Sinarep Sinarep Sinarep Siti Zulaeha Sugiman . Sujita Sujita Sujita Sujita Sujita, Sujita Sukarne Sukarne Sutaryono, Yusuf Akhyar Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja, Suteja Syafri, Edi Syahrul Syarif Hidayatullah Syharul Syahrul . T Topan, T T. Topan, T. Tawaqqal, Akbar Thiagamani, Senthil Muthu Kumar Thiagamani, Sentil Muthu Kumar Ulfa Handayani Wibi Wahid Muharram Yayan Gunanto Yayat Indra Saputra Yogi Prayudi Yudi Ahmad Efendi Yusuf Ahyar Sutaryono Yusuf Akhyar Sutaryono Zahratul Laili