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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Teknologi Rekayasa Mesin Journal of Engineering and Technological Sciences AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat Dinamisia: Jurnal Pengabdian Kepada Masyarakat PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) Jurnal Surya Teknika Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Jurnal Pengabdian Masyarakat Bidang Sains dan Teknologi Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Proksima Leuser Journal of Environmental Studies BATOBO: Jurnal Pengabdian Kepada Masyarakat Jurnal Polimesin IPTEKIN : Jurnal Kebijakan Pembangunan dan Inovasi
Warman Fatra, Warman
Universitas Riau
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Veterinary Other

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Pembuatan Komposit Hybrid Serat Tandan Kosong Sawit (TKS)/E-Glass Bermatrisks Epoxy Dengan Metode Vacuum Bagging Febri Dwi Oktriyono; Warman Fatra; Kaspul Anuar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Utilization of Empty Fruit Bunch (EFB) as a fiber in composite materials has a very important meaning as an alternative in overcoming the problem of waste in the palm oil industry. However, natural fibers in composites have poor compatibility with matrix and relatively high absorption of water. Efforts to overcome this problem are with alkaline treatment and adding coupling agents such as Maleated Natural Rubber (MNR). To improve the mechanical properties of composites is to combine synthetic fibers and natural fibers. Synthetic fibers that are often used as composite reinforcing materials are E-Glass fibers. The advantages of E-Glass fiber are that it has high tensile strength, is resistant to chemicals, and has good insulating properties. The purpose of this study was to determine the effect of the percentage ratio of hybrid fiber (E-Glass/TKS/E-Glass), the percentage ratio of hybrid fiber and matrix, the percentage of coupling agent to tensile strength, flexural strength, and water absorption. The experimental design used is the Surface Response-Central Composite Design (RSM-CCD) Method. The results showed that, the tensile strength increased with the addition of the number of E-Glass, whereas for the matrixs and MNR did not significantly affect the tensile strength. Flexural strength increases with the addition of E-Glass and matrix. Water absorption decreases with the addition of MNR. The ultimate tensile strength (75.549 MPa) with the percentage of 40% EFB fiber, 60% matrix and 9% MNR. The flexural strength (149.111 MPa) with the percentage of 40% EFB fiber, 40% matrix and 9% MNR. The lowest water absorption (4.63%) with the percentage of 60% EFB fiber, 40% matrix and 11% MNR.Keywords : Hybrid Composite, EFB, Response surface method, Maleated Natural Rubber (MNR), Vacuum Bagging.
Studi Eksperimental Variasi Pretension Sambungan Baut Baja Tipe Slip Critical Ardison Gutama; Alex Kurniawandy; Warman Fatra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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On the bridge connection type found using high strength bolts with the type of slip-critical connections. In the installation of high quality bolt connection types is conducted pretension with using torque wrench or using manual tool by turn of nut. This study aims to determine tensile strength and failure behavior of the critical slip-type connection by varying the value of pretension on single bolt locking connection with different methods. Pretension variation used 90 Tb, 100 Tb and 110 Tb for torque wrench and 2/3, 3/6 and 4/6 rounds for manual tools of pretension respectively.Tensile test performed on each variation and variation locking method. The results showed the tensile strength values at the both locking methods are same and the failure behavior result are the bolt fail in shear and plate changes into an oval shape.Keywords: Pretension, Connection slip critical, high tensile bolt, tensile strength of connection.
Pembuatan Dan Karakterisasi Komposit Hybrid Serat Pelepah Pisang Kepok (Musa Paradisiaca) Dengan Serat Tandan Kosong Sawit Bermatriks Epoxy Muhammad Gus Iqbal Al-Pakningi; Warman Fatra; Zuchra Helwani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The Empty Fruits Bunches (EFB) is quite good mechanical properties, which it is waste that has not been utilized  and easily broken down. The problem in previous studies was of voids on the surface and in the composite due to the lack of a percentage of the matrix, resulting in a weak interface bond resulting in low mechanical properties. This research uses banana leaf fiber in hybrid with EFB fiber and epoxy matrix then produced by vacuum bagging method. The banana fiber was extracted with a length of 25 cm and EFB fibers a length of 1, 2, and 3 cm and alkaline treatment using 5% NaOH with a soaking time of 2 hours. For The experimental design and variables that have a significant effect on flexural strength, impact resistance, and water absorption, the statistical method Response Surface Methodology (RSM) is used. The results showed that the maximum flexural strength was at running 6 with a value of 209.11 MPa, with a percentage of banana fiber/EFB (50%: 50%) with a percentage of hybrid/matrix fibers (30%: 70%) and 30 mm EFB fiber length. The maximum impact strength is at running 9 with a value of 2.736 Joules, percentage of banana fiber/EFB (60%: 40%) percentage of hybrid/matrix fibers (35%: 65%), and a fiber length of 3 cm EFB. The minimum water absorption is at running 14 with a value of 0.22%, percentage of banana fiber/EFB (60%:40%) with a percentage of hybrid/matrix fibers (25%: 75%), and a length of 1 cm EFB fiber Keywords: Banana Fiber, EFB, Hybrid composites, Vacuum Bagging, Response Surface Methodology (RSM)
Pengaruh Cetakan Sillicone Rubber Dan Temperatur Tuang Lilin Terhadap Kualitas Pola Lilin Pada Investment Casting Harrianda Hudaya; Warman Fatra; Dedy Masnur
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Abstract

Investment casting method is widely used in the industry, it could produce complex and high precision products.One of the important stage in the investment is the wax pattern production, because the quality of the castproduct depends on the quality of the wax pattern. Sillicone rubber in alternative mold material has goodformability, low thermal conductivity, as well as the low cost of raw materials and the processes compared withmetal. Mold sillicone rubber and pour wax temperature varied 55 ºC, 65 ºC and 75 ºC to investigate the effectof these variables on shrinkage of linear wax patterns and volume wax pattern which expressed as percentage.The lowest average of linear shrinkage is 0.65%, which obtained at temperature 55 ºC. The lowest percentage ofvolumetric shrinkage is 7.59 %, which obtained at temperature 55 ºC.Keywords : invesment casting, mold material, wax pour temperature, shrinkage
Pembuatan Komposit Serat Tandan Kosong Sawit (TKS) Bermatriks Epoxy Dengan Metode Vacuum Bagging Langgeng Budi Wibowo; Warman Fatra; Kaspul Anuar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
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Abstract

Oil Palm Empty Fruit Bunches (OPEFB) are natural fibers that have potential as fillers or reinforcement for polymer composites in terms of physical properties, morphology, and chemical composition. The problem in previous research is the weak bond between the fiber and the matrix, which causes low mechanical properties. Composite manufacture in this study using OPEFB fiber and epoxy matrix with vacuum bagging method. OPEFB fiber with a length of 3 cm was extracted using 5% OPEFB ash with boiling temperatures of 40°C, 55°C, and 70°C, with a boiling time of 1, 2, 3 hours, and in the composite manufacturing process, silane coupling agent was added to the matrix with variation of fractions 1.5%, 2% and 2.5% of the matrix volume. Experimental design and variables affect tensile strength, impact strength and water absorption, to determine the experimental design and variables in this study using the Response Surface Methodology (RSM) statistical method. The results showed the maximum tensile strength at running 19 with a value of 21,859 MPa, with a temperature of 70°C, boiling time of 3 hours, and the addition of a matrix of 2.5%. The maximum impact strength at running 2 with a value of 215.96 J/m, with a temperature percentage of 70°C, boiling time of 3 hours, and the addition of a matrix of 1.5%. Minimum water absorption on running 19 with a value of 1.4%, with a temperature of 70°C, boiling time of 3 hours, and the addition of a matrix of 2.5%. Keywords: Oil Palm Empty Fruit Bunches, method Response Surface Methodology (RSM), Vacuum Bagging, silane coupling agent.
Densifikasi Produk Karbonisasi Pelepah Sawit Menjadi Briket Menggunakan Crude Gliserol Produk Samping Biodiesel Sebagai Filler Arief Maulana Ilham; Zuchra Helwani; Warman Fatra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Abstract

Palm frond has been utilized only for raw source of animal feed, compost and organic fertilizer in plantation area. Oil palm fronds has calorific value of 17.200 kJ/kg. Calorific value can be enhanced by carbonization followed by densification. By carbonization, the elements of smoke maker is able to be minimalized, so it will produce the green exhaust gases. Biomass densification aims to increase density and decrease handling issue such as storage and transportation. Calorific value of densification product can be enhanced more by adding filler like crude glycerol that has calorific value of 25.932,75 kJ/kg. This research aims to produce bricket using densification form palm fronds, to know the impact of particle size, filler composition and pressing pressure in product forming also to know the resulted calorific value and compressive strength of resulted product. Particle size used were 60, 80 dan 100 mesh. Filler composition used were 90 : 10, 80 : 20 dan 70 : 30. Pressing pressure used were 80, 90 dan 100 bar. Highest calorific value resulted was 27.359 kJ/kg at 100 mesh particle size, filler composition of 90:10 and pressing pressure of 100 bar. Highest compressive strength resulted was 37,2 Kg/cm2 at 60 mesh particle size, filler composition of 90:10 and pressing sressure of 100 bar. The most affecting factor to calorific value and compressive strength are filler composition and pressing pressureKeywords: Densification, Carbonization, Compressive Strength, Calorific Value, Oil Palm Fronds
Optimasi Proses Pembuatan Arang Batang Sawit Melalui Proses Karbonisasi Menggunakan Response Surface Methodology Mia Afriyenti; Zuchra Helwani; Warman Fatra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
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Abstract

Palm oil trunk until this date is a waste which still not been used maximally, so palm oil trunk have potential to be used as alternative energy resource of solid fuel with the way of increasing its calorific value through carbonization process. Carbonization is converting process of biomass to become charcoal at temperature range 300-600 oC in inert condition. The objective of this research is to study the characteristics of resulted solid fuels. Palm oil carbonization used tube furnace as reactor within operating conditions of temperature (350, 400 and 450 oC), residence time (90, 120 and 150 minutes) and feed size (2, 4 and 6 cm). The analized responses were calorific value and volatile matter content. Obtained result for calorific value amounts 24,426.300-28,929.100 kJ/kg and volatile matter content amounts 8-19 %. The obtained analysis is processed using Design Expert v7.0.0 Trial Version. Processing data begins with using first order to see the degree of curvature. Degree of curvature obtained indicate the model to use is second order. Level of significance between variables can be observed from the value of P-value < 0,05 and lack of fit > 0,05, which indicate that model is suitable with the obtained data. R2 obtained for Y1 = 0.9486 and Y2 = 0.9704. The most influential factors to all responses are carbonization temperature followed with residence time and feed size. At optimum operating conditions (temperature 449,99 °C during 149,96 minutes with feed size 2 cm), the value of optimum responses obtained are Y1= 28.282,2 kJ/kg and Y2 = 9,234 %.Keywords : biomass, carbonization, optimization, palm oil trunk, rsm, solid fuel
Pembuatan Komposit Serat Campuran Tandan Kosong Sawit (TKS)/E-Glass Matriks Epoxy Dengan Metode Hand Lay-Up Rivo Fernando; Warman Fatra; Zuchra Helwani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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Abstract

Empty Fruit Bunch (EFB) is one of the palm oil plantation waste that has not been utilized optimally. EFB fiber has a good strength, low density, and it can be used for substituting synthetic fiber composite. However, the strength of EFB fibers is lower than that of synthetic fibers. In addition, EFB fibers also have a poor interface with the matrix and relatively high water absorption. Several methods can be used to increase the bonding strength between the fibers and matrix, alkaline treatment and the addition of coupling agent into the matrix. One of the coupling agent is Maleated Natural Rubber (MNR). The objective of this research is to investigate the effect of the ratio of EFB /E-Glass fibers, ratio of hybrid fibers and matrix as well as the addition of MNR on tensile strength, flexural strength and water absorption of EFB/E-Glass epoxy hybrid composite. The highest tensile strength (77.254 MPa) was obtained in the composition of 40% EFB fiber, 60% matrix and 9% MNR. The highest flexural strength (147.446 MPa) was obtained in the composition of 33.18% EFB fiber, 50% matrix and 10% MNR. The lowest water absorption (4.46%) was obtained in the composition of 40% EFB fiber, 40% matrix and 11% MNR. The results show that the tensile strength increases with the addition of EGlass. While the addition of the matrix and MNR does not significantly affect tensile strength. Flexural strength increases with increasing number of E-Glass and matrix. Keywords: Empty Fruit Bunch (EFB); Hybrid Reinforce; Alkaline Treatment; coupling agent; Maleated Natural Rubber (MNR)
Pengaruh Variasi Kecepatan Putar, Temperatur Cetakan Dan Temperatur Tuang Terhadap Fluiditas Pengecoran Aluminium Kaleng Minuman Menggunakan Metode Qudong Andry Sutanto; Warman Fatra; Zuchra Helwani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
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Castability is a measur of the ability of an alloy to be formed according to the desired shape using a casting process, which is limited by fluidity. Qudong method 1999, used in this research with varying pouring temperature; 650oC, 700oC, 750oC, mold temperature; 100oC, 200oC, 300oC and cavity thickness; 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm. As an effort to increasing castability, this research giving a rotation to look the effect of variation mold temperature, pouring temperature and rotation. Fluidity increased with the increasing pouring temperature, mold temperatur and rotation. Fluidity increases with cavity thickness, maximum fluidity achieved at pouring temperature 750oC, mold temperature 300oC and rotation 1500rpm at 2.0-4.0 mm with a length of 120 mm and minimum fluidity can be filled with molten metal is at 0.5 mm with a length of 15.5 mm.Keywords : fluidity, molten aluminum cans, pour temperature, mold temperature, rotation.
Karakterisasi Material Kemasan Pulp Cetak Tanpa Perekat Dari Pulp Batang Jagung Muhammad Rifki Aulia Rahman; Warman Fatra; Zuchra Helwani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
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Molded pulp is an alternative packaging which has renewable and biodegradable properties. The use of molded pulp as packaging material still constrained due to the specific data that describes the characteristics of molded pulp has not widely publicized yet. This study was conducted to identify the characteristics of molded pulp as an alternative packaging material. Cornstalk was selected as raw materials which has abundant availabilty. Molded pulp packaging was manufactured by thermoformed methods. The thermoset nature of lignin in cornstalks would give possibilties in manufacture of molded pulp without using adhesive. The results showed the mechanical characteristics of binderless molded pulp from cornstalk pulp which have tensile index from 17.78 to 35.78 Nm/g, tear index from 9,25 to 26,09 mN.m2/g, and burst index from 0.901 to 1.5 kPa.m2/g. The effects of dependent variables on the mechanical properties of molded pulp were studied by statistical modelling using a polynomial second order. The empirical models were deduced to satisfactorily fit experimental data with the values of independent variables and allow to quantifiying the effects of each variables. The most influential factor on tensile and burst index of molded pulp was temperature of processing. Whereas, the processing pressure has greater influence on tear index of molded pulp.Keywords:material characterization; binderless, molded pulp; mechanical properties; statistical modelling.
Co-Authors Adelina Afriyenti, Mia Afrizal, Efi Akbar, Musthafa Akhyar, Waldi Naziful Alex Kurniawandy Andry Sutanto Anita Susilawati Anuar, Kaspul Apri, Welli Ardison Gutama Arief Maulana Ilham Asep Rusyana Asral, Asral Asrian, Angga Aswie, Viqha Awaludin Martin Cupu, Dedi Rosa Putra Dedy Masnur, Dedy Feblil Huda Febri Dwi Oktriyono Feri Candra Fernando, Rivo Gun Faisal Hari Rionaldo Hari Rionaldo Hari Rionaldo Harrianda Hudaya Harrianda Hudaya Herisiswanto Herisiswanto Hutagaol, Martiandes Imam Nugraha Indah Permata Sari Indra Suharman Indra Yasri Irdoni HS Kusuma, Aryandi Langgeng Budi Wibowo Lukman Arifin Mia Afriyenti Muftil Badri Muhammad Gus Iqbal Al-Pakningi Muhammad Mardhiansyah Muhammad Rifki Aulia Rahman Muhammad S. A. Aziz N. Nazaruddin N. Nazaruddin Nazaruddin Oktary, Dian Oktriyono, Febri Dwi P.C1, Dedi Rosa Pekei, Ferdinandus Putra Cupu, Dedi Rosa Putra, Bayu Eldino Putri Nawangsari Putri Nawangsari, Putri Rahman, Rezky Ramdhani Asywal Randi Sanjaya Randi Sanjaya, Randi Reno Susanto Rivo Fernando Riza, Subkhan Somadona, Sonia Syafri Syafri Syafri, Syafri Yemita, Sylvia Yuli Handika Hasyim Z Zulfansyah Zuchra Helwani Zuchra Helwani, Zuchra Zul Amraini, Said