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All Journal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
A.A.A. Triadi, A.A.A.
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Aerospace Engineering Automotive Engineering Mechanical Engineering Physics

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Penerapan IPTEKS pada usaha Handycraft Ketak berorientasi Ekspor di desa Karang Bayan Kecamatan Lingsar Kabupaten Lombok Barat Triadi, A.A.A.; Nuarsa, M.; Bisma, DG.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 7, No 2 (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 (548.618 KB) | DOI: 10.29303/dtm.v7i2.151

Abstract

Products Woven or ketak is a handicraft product produced by the ‘artisans’ community in the village of Karang Bayan West Lombok with raw materials from plants ketak. In the process it takes the necessary skills to weave and combine woven ketak with other natural products such as wood, pottery, coconut shell or bone. The marketing of wicker web products has penetrated the export market, especially the Japanese market. Problems experienced by industrial partners or the artisan’s community is the transfer of design from businessmen to crafters (door to door), drying process during the rainy season and business management. Designs are sometimes made by the buyer and sent to the entrepreneur via email. The solving problem that is faced by the producents is the important thing to be done, by approaching the centralized design transfer training (in one place that is done in the partner house).  The next one, making a mechanical dryer with two heat sources located beside left and lower right and LPG-fueled (clean, practical, economical and environmentally friendly). Next step, by providing business management assistance (finance and marketing).
Analysis of the immersion time of nettle fiber in NaOH and silane on the hardness and toughness of composite hybrid materials Suarsana, K.; Suryawan, I.G.P.A.; Sunu, P.W.; Triadi, A.A.A.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 12, No 2 (2022): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v12i2.573

Abstract

The advantages of stinging nettle fiber (Urtica dioica L.) properties as a substitute for synthetic fibers for reinforcing composite materials are its strength and light weight compared to other natural fibers. This study aims to find the mechanical properties of hybrid composites reinforced with stinging nettle fiber based on immersion treatment of the fibers with chemical solutions. The mechanical properties studied include the hardness and toughness of the hybrid composite. This paper examines the effect of fiber immersion time in NaOH and Silane coupling agent solutions at concentrations of 3% and 9% which are used as reinforcement for hybrid epoxy resin composites. Variations of fiber immersion time in NaOH and Silane solutions: 30, 60, 90, and 120 minutes. Hybrid composite was produced by hand lay-up molding method. The results showed that the highest value of hardness was 88,254 VHN and toughness was 7,459 kJ/m2 at 9% immersion. NaOH solution can remove impurities and lignin in the fiber and Silane coupling agent can form strong bonds because it has a hydroxy group. Based on the results of the study, it can be concluded that the hardness and toughness of the hybrid composite reinforced by stinging nettle fiber has higher hardness and toughness at 9% NaOH and Silane treatment with immersion time of 120 minutes.
Efek gaya tekan pembuatan hibrid komposit berpenguat SiCw/Al2O3 dengan wetting agent Mg terhadap sifat fisik dan mekanik Suarsana, K.; Suardana, N.P.G.; Negara, D.N.K.P.; Sunu, P.W.; Triadi, A.A.A.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 11, No 1 (2021): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (355.243 KB) | DOI: 10.29303/dtm.v11i1.368

Abstract

The growing demand for metal-based materials in the manufacturing industry has prompted the development of composite materials that have better mechanical and physical properties than single materials. The development be done in order to obtain new materials that have better properties. The research was conducted using a powder metallurgy process, by varying the compressive force and holding time in order to determine the effect of the combination of compression and holding time on the mechanical and physical properties of composites. The variations in the compressive force are 20, 25, and 30 kN, with a holding time of 15, 30 and 45 minutes for each force. Research includes tests of density, porosity, hardness, wear and Scanning Electronic Microscope. The results of the density test showed that the highest density value was 2.982 gr/cm3 and the lowest porosity value was 13.074% at a compressive force of 25 kN, holding time of 45 minutes. The results of the highest hardness value 53.455  kg/mm2 at 30 kN, 45 minutes and the lowest wear value 2.15455E-05 gr at a pressure of 20 kN, 15 minutes. Based on the test results, the characteristics of the density are inversely proportional to the porosity, while the hardness and wear are influenced by the length of holding time in the moldof a composite using aluminum as a matrix needs too.
Pengaruh laju pemanasan dan variasi komposisi limbah paduan aluminium dengan Fly Ash Batubara terhadap kekerasan dan kekuatan tekan produk metalurgi serbuk Triadi, A.A.A.; Setyawan, P.D.; Kurniawan, I.K.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.682

Abstract

In this study, the manufacture of composites using the powder metallurgical method used two research variables, namely the rate of heating with variations in temperature with an increase of 3°C/minute, 5°C/minute and an increase of 7°C/minute.  The second variable is the mixing composition with variations in aluminium composition: Fly Ash is 100%:0%, 85%:15%, 80%:20% and 75%:25%.  The highest hardness results in this study were found in the 15% fly ash composition with a heating rate of 3°C/minute where the hardness value was 66.17 HRF while the lowest hardness value was found in the 0% fly ash composition with a heating rate.  of 7°C/min with a hardness value of 34.84 HRF.  For compressive strength test results.  the highest value was obtained in the 15% Fly Ash composition with a heating rate of 3°C/minute where the compressive strength value was 106.78 MPa, while the lowest compressive strength value was in the 0% fly ash composition with a heating speed of 7°C minutes where the value was 42.71 MPa.  From the hardness and compressive strength value, it can be concluded that the smaller the heating rate, the higher the hardness and compressive strength and the greater the SC mixing composition, the higher the hardness and compressive strength.
Efek suhu sintering terhadap sifat kekerasan bahan campuran Al/Cu/Sic melalui proses metalurgi serbuk Triadi, A.A.A.; Yudhyadi, I.G.N.K.; Suartika, I.M.; Sari, N.H.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 2 (2019): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (427.568 KB) | DOI: 10.29303/dtm.v9i2.277

Abstract

This study aims to investigate the hardness properties of materials made of a mixture of aluminum, copper, and silicon carbide powders. The product has been made of mixtures aluminium (Al), copper (Cu) and silicon carbide (SiC) powders with a concentration of 80; 15; 5 (% wt), respectively. Manufacture of the specimens was conducted used powder metallurgy. The dimension of the specimens’ diameter of 25 mm and a thickness of 4 mm. The variation of the temperature sintering is 320, 420 and 520 oC for 40 minutes. The hardness properties have analyzed using the Brinell method. The results show that at the temperature range  320 - 420 oC, the hardness of the specimen increase to 15.2 BHN; it is due to the bond between metal powders is formed strong enough. Conversely, at 520 oC the hardness number is low because most of SiC is bound weakly to other powders. It can be concluded that the selection of temperature and sintering time and proper mixing greatly influence the hardness properties of materials yields of powder metallurgical.
Uji performansi motor listrik sebagai penggerak kendaraan listrik Mara, M.; Yudhyadi, I.G.N.K.; Adhi, I.G.A.K.C.; Setyawan, P.D.; Triadi, A.A.A.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i1.607

Abstract

The effect of variations in vulcan concentration in agel-cotton rope as a reinforcement for ripoxy composites on thermal conductivity properties Suarsana, I.K.; Santhiarsa, I.G.N.N.; Tenaya, I.G.N.P.; Tarigan, A.R.F.; Triadi, A.A.A.
Dinamika Teknik Mesin Vol 15, No 2 (2025): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v15i2.1097

Abstract

Ripoxy composites reinforced with natural agel-cotton rope reinforcement have attracted attention in engineering material applications due to their mechanical properties and environmentally friendly waste. Vulcan chemicals, which are fillers or additives in the composite manufacturing industry, are believed to be able to improve the thermal properties of the composite. This study aims to examine the effect of vulcan chemical treatment on thermal conductivity in ripoxy composites reinforced with cotton rope. This test was carried out by soaking agel-cotton rope textiles in Vulcan solution for 1 hour with variations in solution concentration: 0%, 25%, and 50%. The printing of test specimens was carried out using a Vacuum Infusion printing tool, so that the printed specimen results were not contaminated by outside air. Thermal conductivity tests were carried out using the ASTM - D5470 standard. The test results that have been obtained, the 25% concentration variation has the smallest thermal conductivity value, with a value of 0.064 W / m°C at a temperature of 100° C and 0.171 W / m°C at a temperature of 200°C. Meanwhile, with a concentration variation of 50% the value increases because the greater the concentration of Vulcan given, the density of the composite material will increase, and higher concentrations can reduce the number of pores or voids in the composite which can usually inhibit heat flow.
Penerapan IPTEKS pada usaha Handycraft Ketak berorientasi Ekspor di desa Karang Bayan Kecamatan Lingsar Kabupaten Lombok Barat Triadi, A.A.A.; Nuarsa, M.; Bisma, DG.
Dinamika Teknik Mesin Vol 7, No 2 (2017): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v7i2.151

Abstract

Products Woven or ketak is a handicraft product produced by the ‘artisans’ community in the village of Karang Bayan West Lombok with raw materials from plants ketak. In the process it takes the necessary skills to weave and combine woven ketak with other natural products such as wood, pottery, coconut shell or bone. The marketing of wicker web products has penetrated the export market, especially the Japanese market. Problems experienced by industrial partners or the artisan’s community is the transfer of design from businessmen to crafters (door to door), drying process during the rainy season and business management. Designs are sometimes made by the buyer and sent to the entrepreneur via email. The solving problem that is faced by the producents is the important thing to be done, by approaching the centralized design transfer training (in one place that is done in the partner house).  The next one, making a mechanical dryer with two heat sources located beside left and lower right and LPG-fueled (clean, practical, economical and environmentally friendly). Next step, by providing business management assistance (finance and marketing).
Analysis of the immersion time of nettle fiber in NaOH and silane on the hardness and toughness of composite hybrid materials Suarsana, K.; Suryawan, I.G.P.A.; Sunu, P.W.; Triadi, A.A.A.
Dinamika Teknik Mesin Vol 12, No 2 (2022): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v12i2.573

Abstract

The advantages of stinging nettle fiber (Urtica dioica L.) properties as a substitute for synthetic fibers for reinforcing composite materials are its strength and light weight compared to other natural fibers. This study aims to find the mechanical properties of hybrid composites reinforced with stinging nettle fiber based on immersion treatment of the fibers with chemical solutions. The mechanical properties studied include the hardness and toughness of the hybrid composite. This paper examines the effect of fiber immersion time in NaOH and Silane coupling agent solutions at concentrations of 3% and 9% which are used as reinforcement for hybrid epoxy resin composites. Variations of fiber immersion time in NaOH and Silane solutions: 30, 60, 90, and 120 minutes. Hybrid composite was produced by hand lay-up molding method. The results showed that the highest value of hardness was 88,254 VHN and toughness was 7,459 kJ/m2 at 9% immersion. NaOH solution can remove impurities and lignin in the fiber and Silane coupling agent can form strong bonds because it has a hydroxy group. Based on the results of the study, it can be concluded that the hardness and toughness of the hybrid composite reinforced by stinging nettle fiber has higher hardness and toughness at 9% NaOH and Silane treatment with immersion time of 120 minutes.
Pengaruh laju pemanasan dan variasi komposisi limbah paduan aluminium dengan Fly Ash Batubara terhadap kekerasan dan kekuatan tekan produk metalurgi serbuk Triadi, A.A.A.; Setyawan, P.D.; Kurniawan, I.K.
Dinamika Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.682

Abstract

In this study, the manufacture of composites using the powder metallurgical method used two research variables, namely the rate of heating with variations in temperature with an increase of 3°C/minute, 5°C/minute and an increase of 7°C/minute.  The second variable is the mixing composition with variations in aluminium composition: Fly Ash is 100%:0%, 85%:15%, 80%:20% and 75%:25%.  The highest hardness results in this study were found in the 15% fly ash composition with a heating rate of 3°C/minute where the hardness value was 66.17 HRF while the lowest hardness value was found in the 0% fly ash composition with a heating rate.  of 7°C/min with a hardness value of 34.84 HRF.  For compressive strength test results.  the highest value was obtained in the 15% Fly Ash composition with a heating rate of 3°C/minute where the compressive strength value was 106.78 MPa, while the lowest compressive strength value was in the 0% fly ash composition with a heating speed of 7°C minutes where the value was 42.71 MPa.  From the hardness and compressive strength value, it can be concluded that the smaller the heating rate, the higher the hardness and compressive strength and the greater the SC mixing composition, the higher the hardness and compressive strength.
Co-Authors Adhi, I.G.A.K.C. DG. Bisma, DG. Kurniawan, I.K. M. Nuarsa, M. Mara, M. N.H. Sari Negara, D.N.K.P. NPG Suardana P.D. Setyawan, P.D. Santhiarsa, I.G.N.N. Suarsana, I.K. Suarsana, K. Suartika, I.M. Sunu, P.W. Suryawan, I.G.P.A. Tarigan, A.R.F. Tenaya, I.G.N.P. Yudhyadi, I.G.N.K.