Manufaktur Bodi Kendaraan Shell ECO Marathon (SEM) Tipe Urban Bahan Komposit Serat Karbon

In the development of manufacturing industry the use of composite materials began to be widely used. One of them is composite by using fiber glass or fiber carbon, because of its characteristic that can be designed close to certain needs. In addition the specific strength and stiffness are far exceeding the engineering material in general. This research uses carbon fiber composite material as vehicle body material Shell Eco Marathon (SEM), Which a fraction volume of 70% resin polyester and 30% of carbon fiber. The composite is made using Hand Lay Up method that produces vehicle body SEM of consist of main frame and styrofoam. The result of manufacturing the SEM vehicle body is obtained, so that it can be used as an Urban SEM vehicle body

Kaji Pembuatan Kanvas Rem Sepeda Motor Bahan Komposit dengan Filler Palm Slag

Brake pads have a very important role to become a major factor in driving safety. Brake quality depends on the constituent materials. Palm slag is one that has potential as a filler material for composite brake. Manufacture of brake pads in this study using the palm slag as a filler, phenolic resin as a binder, steel powder as reinforcing, graphite as a lubricant, alumina as an abrasive. In the manufacture of brake pads remains composition of materials used to variation the compacting and sintering temperature. This study will examine the wear rate and hardness in the brake pads against the brake commercial reference. Brake pads are made with palm slag initial compacting varied is 190 Bar and 380 bar and then proceed with the final compacting of 450 bar ± 2 minutes. Brake pads that have been heated to a temperature of 1500C using the heater. Brake pads that have been sintered variations to 1500C and 1700C. Brake pads that have sintered be tested for wear and hardness. Brinell hardness testing to get the highest hardness in the brake B is 15.35 BHN (kgf/mm2) commercial brake approaching violence. In dry conditions the wear testing found the smallest wear is approaching commercial brake brake B is equal to 4777 x 10-6 g/mm2.seconds with a braking time of 15.33 seconds and shortest braking distance is 63 meters

Desain dan Manufaktur Hopper Penyalur Pupuk Menggunakan Valve Metering Mechanism pada Cultivator untuk Pemupukan Kelapa Sawit

Fertilization plays an important role in increasing the production of palm oil. Fertilization by manually deployed using the hand is considered less effective because the dose of fertilizer is not uniform and improper fertilization methods. The purpose of thisresearch is to design and make the hopper (tank fertilizer distributor) for precise fit required dose and volume of uniform fertilizer for each tree. The case study method is used to getinformation about fertilization technique and dose of fertilizer. The information obtained is used to design and acquire the dimensions, the shape of the hopper is made. Design methodusing descriptive design french. Once the image is finished then print out the pictures do the work that will be done the manufacturing process. From the calculation and testing obtained capacity ofthe reservoir tank is 7.5 liters, volumemetering 1 0:09 L, metering 2 0.17 L, metering 30.26 L with dimensions of 200 mm × 150 mm × 283 mm. From the simulation results obtained structural analysis of the maximum value of the safety factor 15 minimum safety factor of 3.49, while the maximum displacement and displacement 0.04568 minimum 0 results shows that the hopper is safe to use. Hopper performance results have been obtained through the testing process with an average dose of the valve 1 0.07 kg (urea), 0.08 kg (TSP), valve 2 0.12 kg (urea), 0.14 kg (TSP fertilizer), and valve 3 0.17 kg (urea), 0.19 kg (TSP)

Studi Potensi Pasir Sungai di Sungai Rokan sebagai Pasir Cetak pada Pengecoran Logam

Rokan river is one of the the four biggest river in Province of Riau which contains abundant of sand. The utilization of the sand has not reached an optimum level due to the limits of information for optimal profitability with it is not documented and therefore it is used only for building's materials. However some literatures indicate that the sand is suitable for foundry use based on the physical characteristics. In this paper, a laboratory investigations of four critical foundry properties; clay content, Grain Finest Number (GFN), moisture content, and permeability of the sand is conducted. The outcome of this research to determine the potency of Rokan river's sand as molding sand in Sand Casting. The result shows all the samples are potential as the molding sand through certain treatments. The most potential river sand is downstream river's sand with the following characteriscs: clay content 1.29%, GFN 27.25, moisture content 1.35% and gas permeability 10.9564 cm/min while the upstream river's sand: clay content 1.24%, GFN 17.94, moisture content 1.31% and gas permeability 12.6524 cm/min

Desain dan Penentuan Lokasi Pembebanan Pendulum Alat Uji Impak untuk Pengujian Produk Hasil Las Gesek Rotary Bar-Plate

Fracture that occurred in bar-plate friction welding joint on component, be it with a similar or dissimilar materials, can be reviewed by destructive testing. One of the destructive test on weld joint by friction welding is the impact test. Pendulum of standart Charpy and Izod is not match to use for it. Therefore, in this study was made the design and set up pendulum of impact testing for it, using the finite element method software, by considering dynamic factors that may affect fracture such as, loading angle, loading point on the product bar-plate, the dimensions of pendulum, maximum stess thet occurs, and the mass variation of the pendulum. The Obtain summaries are as follows: (1) Results of the Pendulum tests, it was safe to use, it was qualyfied for pendulum impact testing, and plastic deformation was not occurs on entire pendulum. (2) Based on tests result, loading point (x) at 10mm, affected fracture between bar and plate in HAZ section, while loading point at 40 mm until 15 mm affected fracture on plate, not on the section between bar and plate

Analisis Sifat Mekanik Komposit Serat Sabut Kelapa sebagai Material Alternatif Pengganti Kayu untuk Pembuatan Kapal Tradisional

Recently, it has been difficult to get the wood as a material to construct the traditional ships. Alternatively, the wood can be substituted by composite materials such as the composite of coco fiber. The coco fiber composites have potential to construct a fishing boat. In this research produced the composite plates and investigation of their value of tensile strength and flexural strength. The composite composition was used 70% polyester and 30% coco fiber. Production of the composite plates used Vacuum Assisted Resin Infusion (VARI) method by variation of the direction of fibers (random, continous and woven). Based on the research result that was produced the composite plates sizes of 400 x 400 x 8 mm and the value of tensile strengths of composite coco fiber for random fiber direction of 12.8572 N/mm2, continuous fiber direction of 15.4436 N/mm2 and woven direction of 12.1797 N/mm2. The value of flexural strengths for random fiber direction was 97.3220 N/mm2, continuous fiber direction of 96.1347 N/mm2 and woven fiber direction of 80.3922 N/mm2. In conclusion, the value of the highest tensile strength and the highest flexural strength were a continuous fiber direction and a random fiber direction, respectively

Estimasi Kapasitas dan Titik Berat pada Pembuatan Kapal Jaring Tradisional di Galangan Kapal Bagan SiapiApi Kabupaten Rokan Hilir Menggunakan Software Autodesk Inventor 2010

Jaring ship building in Bagan Siapiapi Kabupaten Rokan Hilir Riau in general is traditionally. One example that still use the traditional way is how to determine the capacity and center of gravity. In estimating the capacity and gravity in Bagan Siapiapi Kabupaten Rokan Hilir Riau is not accurate so as to anticipate it, Bagan Siapiapi community change the shape and size of the vessel at the time of testing The purpose of the study to estimate the capacity and center of gravity in Bagan Siapiapi. This research is a study case method that uses a single fishing vessel industry is in Bagan Siapiapi. Jaring's ships measured ship's main dimensions, construction Linggi, keel construction, joist construction, foundation construction machinery, building construction on the upper deck, and wood density testing, subsequent construction of ships drawn using Autodesk Inventor 2010 software. Capacity and center of gravity jaring ship calculations using Autodesk Inventor 2010 software. From the data processing capacity of jaring Bagan Siapiapi Chart for 7.093 kg and an emphasis on jaring ship Bagan Siapiapi is at position: (1) unloading condition (0,9 mm; 888,5 mm ;-162,5 mm) the front view with the tilt angle of the ship experienced a shaky 89,24o and -84o side view (2) maximum load condition ( 0,7 mm; 976,7 mm; -600,4 mm) the front view with the tilt angle of the ship experienced a shaky -89,8o and side view 80,03o

Redesign Alat Las Gesek Rotari Dengan Pendekatan Fault Tree Analysis (FTA) Dan Design for Manufacture and Assembly (DFMA)

The FTA is a method to identify the failure of system. Whilst, the DFMA is a method to determine how to design of product, which is purposed to increases the quality of product and make easily the product assembly process. The rotary friction welding is one of type of friction welding, that principle is both of surfaces by friction which one end is fixed and then provides axial pressure to against another the rotating surface until both surface forge together. The Rotary friction welding machine in Production Technology Laboratory, Department of Mechanical Engineering, Universitas Riau has some shortcoming, as sequences the welding results are not optimal. Furthermore, this research aims to overcome the deficiency rotary friction welding machine in the Mechanical Engineering, Universitas Riau, then identified the problems using the FTA method and redesign one using the DFMA method. There were several steps to conduct testing of the rotary friction welding i.e. before redesign, after redesign, and final testing, which was obtained a final better design. Result of testing indicated an average value of the vibration was reduced, on the x-axis was reduced from 15.34 mm /s to 15.44 mm /s, the y-axis of 20.04 mm /s to 17.94 mm /s, z axis of 28.58 mm /s to 18.58 mm /s. Then, the average maximum tensile strength of the welding specimen increased from 574.66 N/mm2 to 651.10 N/mm2, and the assembly efficiency increased from 3% to 5%. It can be concluded the redesign of rotary friction welding was better than before

Desain Profil C+ Struktur Baja Ringan pada Konstruksi Rangka Atap

Light gauge steel is the latest innovation in overcoming material problems in the use of roof construction,especially the roof of the house. Generally, the construction of the roof of the house was made of wood, butbecause of the scarcity of wood made there should be a diversion in the use of materials. The use of light gaugesteel as a roof construction of the house has not been fully accepted by all of societies in general, due toconcerns in its strength. So this thesis discusses about the strength of the material and search for a better profilewithout any reduction of the existing structural material in the market. The profile design is the development ofan existing profile design or commercial profile. Testing of the comparison of new profile design results withcommercial profiles is done by simulation of Autodesk Inventor 2010. Simulation results are in the form ofcomparison of numbers. The result of the design number are better when compared from the commercialprofile then the design was chosen with through considerations