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Karakteristik Kekuatan Bending Kayu Komposit Polyester Diperkuat Serat Pandan Wangi dengan Filler Serbuk Gergaji Kayu Nasmi Herlina Sari; IGNK Yudhyadi; Emmy dyah S
Jurnal Energi Dan Manufaktur Vol 6 No 2 (2013): Oktober 2013
Publisher : Department of Mechanical Engineering, University of Udayana

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AbstrakBeberapa kelemahan kayu yang tidak memungkinkan mendapat papan yang lebar dan stabil,maka dimulailah dibuat papan buatan dengan berbagai cara pengerjaan dan jenis papanbuatan. Penelitian ini bertujuan untuk mengetahui karakteristik kayu komposit polyester yangdiperkuat oleh serat pandan wangi dan serbuk kayu gergaji. Pembuatan kayu kompositdilakukan dengan menggunakan teknik hand lay up. Material penyusun kayu komposit adalahserat pandan wangi dengan variasi panjang serat 15 mm, 20 mm, 25 mm, 50 mm dan 100 mm,dan fraksi volume serat 20% dan 30% dan filler serbuk kayu gergaji sengon 5% (fraksivolume). Perekat yang dipakai adalah resin polyester dengan hardener 1% metil etil peroksida.Pengujian bending telah dilakukan dengan metode three point bending dan telah dianalisisstatistik menggunakan Two Way ANOVA. Hasil penelitian menunjukkan bahwa pada fraksivolume 20% serat, menunjukkan terjadinya kecenderungan peningkatan kekuatan bendingpada variasi panjang serat 15, 20, 25, 50 (mm) dengan rata-rata kekuatan bending secaraberurutan masing-masing sebesar 56,7 Mpa, 67 Mpa, 90 Mpa dan 93.33 Mpa. Selanjutnyanilai terendah dimiliki oleh kayu komposit dengan panjang serat 100 mm yaitu sebesar 78.3Mpa. Sedangkan pada fraksi volume serat 30% dengan variasi panjang serat yang samacenderung meningkat pada variasi panjang serat 15 mm, 20 mm dan 25 mm secara berurutanyaitu sebesar 77 Mpa, 86.1 Mpa, dan 93.6 Mpa tetapi kayu komposit dengan panjang 50 mmdan 100 mm cenderung menurun dengan nilai kekuatan bending berurutan yaitu sebesar76.11 Mpa dan 73.6 Mpa.Kata kunci: Kayu komposit, serat pandan wangi, filler, serbuk gergaji kayu, polyesterAbstractSome disadvantages of wood that does not allow the board received a wide and stable, thenbegan the boards made workman ship made in various ways and types of artificial board. Thisstudy aimed to investigate the characteristics of composite wood polyester reinforced bypandannus amaryllilofius fiber and sawdust. Manufacture of wood composites made usinghand lay-up techniques. Constituent materials of the composite wood is fiber length variation offiber 15 mm, 20 mm, 25 mm, 50 mm and 100 mm, and the fiber volume fraction of 20% and30%, while sengon sawing wood dust 5% filler (volume fraction). the matrix is using polyesterresin with 1% hardener from metal etil keton peroxide. And then bending testing was done withthree point bending method. and then statistic analysis was done using two way ANOVA. Theresults showed that at 20% fiber volume fraction, showed an increasing trend in the variation ofbending strength fiber length 15, 20, 25, 50 (mm) with an average bending strengthsequentially respectively 56.7 MPa, 67 MPa, 90 MPa and 93.33 MPa. Furthermore, the lowestvalue is owned by a wood composite with a fiber length of 100 mm is equal to 78.3 Mpa. Whilethe fiber volume fraction of 30% with a variation of the same fiber length is 15 mm, 20 mm, 25mm, 50 mm and 100 mm are also experiencing an increasing trend in the variation of fiberlength of 15 mm, 20 mm and 25 mm respectively amounting to 77 Mpa , 86.1 MPa and 93.6Mpa. But composite wood with a length of 50 mm and 100 mm tends to decline with successivebending strength value that is equal to 76.11 MPa and 73.6 MPa.Key Word: Composites wood, pandanus amaryllifolius of fiber, filler, sawdust wood, polyester

Ketahanan Bending Komposit Hybrid Serat Batang Kelapa/Serat Gelas Dengan Matrik Urea Formaldehyde Nasmi Herlina Sari; Sinarep -; Ahmad Taufan; IGNK Yudhyadi
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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The composite has its own advantages compared to other alternative techniques such material is strong, lightweight,corrosion-resistant, economical and so on. The purpose of this study was to investigate the characteristics of bending strengthfiber composite hybrid coconut trunk / fiber glass using urea formaldehyde resin.Hybrid palm trunk fiber /glass fiber composite have been made by hand lay up which volume fraction fiber hybridvariation namely 10:20, 15:15 and 20:10 (%) with length fiber 2 cm. Every Tests conducted were bending testing with eachvariation performed three times repetition. Bending test specimens in accordance with standard ASTMD 790.The results of bending strength of palm trunk fiber hybrid composite / fiber-glass with random fiber direction that thehighest bending strength in the palm trunk fiber volume fraction 10% and 20% glass fiber that is 22.7 N/mm2.

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

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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.

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

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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.

PERANCANGAN ALAT PEMINDAH PERAHU ”MODEL DEREK” UNTUK NELAYAN TRADISIONAL PESISIR PANTAI CURAM Yudhyadi, IGNK; Suartika, I Made; Zainuri, Achmad; Fajar, M.
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

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The steep coastal topography makes the traditional fisherman facing a difficulty for moving boat from/to the sea towards the mainland. With the slope of 2 - 3 meters, it required at least 4 people do the job. This situation is very disturbing and reducing the productivity of the fishermen itself. Therefore, it needs a special equipment or appropriate technology to overcomes the drawback situation. So that, it will improve the efficiency and effectiveness of fishing operations. The method used in this study is an applied research method which the tool is designed based on real phenomena. Moreover, the outcome is the design of boat transfer device that will be used as an additional supplement to the teaching material of design and product development, industrial management, as well as a scientific publications. The design expected can improve the steep coastal fishermen productivity and welfare.

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

Show Abstract | Download Original | Original Source | Check in Google Scholar

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.

EFFECT OF TUBE DIAMETER AND SURFACE ROUGHNESS ON FLUID FLOW FRICTION FACTOR Mirmanto, M.; Yudhyadi, IGNK; Sulistyowati, Emmy Dyah
Dinamika 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

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.

PERANCANGAN ALAT PEMINDAH PERAHU ”MODEL DEREK” UNTUK NELAYAN TRADISIONAL PESISIR PANTAI CURAM Yudhyadi, IGNK; Suartika, I Made; Zainuri, Achmad; Fajar, M.
Dinamika 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

The steep coastal topography makes the traditional fisherman facing a difficulty for moving boat from/to the sea towards the mainland. With the slope of 2 - 3 meters, it required at least 4 people do the job. This situation is very disturbing and reducing the productivity of the fishermen itself. Therefore, it needs a special equipment or appropriate technology to overcomes the drawback situation. So that, it will improve the efficiency and effectiveness of fishing operations. The method used in this study is an applied research method which the tool is designed based on real phenomena. Moreover, the outcome is the design of boat transfer device that will be used as an additional supplement to the teaching material of design and product development, industrial management, as well as a scientific publications. The design expected can improve the steep coastal fishermen productivity and welfare.

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