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All Journal INTEK: Jurnal Penelitian Jurnal Polimesin
Simon, Christof Geraldi
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Automotive Engineering Computer Science & IT Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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Comparison of the Effect of Variable Helix Angle Geometry Tools on CNC Vertical Milling Machines on Chatter using a microcontroller Based on SLD Simon, Christof Geraldi; Hardinsi, Festo Andre; Paliling, Formanto
INTEK: Jurnal Penelitian Vol 10 No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v10i1.4265

Abstract

Vibrations that often occur in the production process using CNC milling machines are very important to take into account. These vibrations can cause dimensional changes and affect the level of quality produced, so the effect of chatter vibrations on production becomes a major problem in the milling process. Vibration values are determined using SLD graphs experimentally, analytically and semi-analytically. The material used in this study is SS 304, MPU 6050 which is connected to Arduino Uno using LabVIEW 2019 student edition software in the form of FFT charts. Data collection using experimental methods, tool geometry parameters are tool geometry VHA 35/38 degrees and VHA 36/38 (Degrees), Spindle Speed 2000,2500,3000 (RPM), Depth Of Cut 0.4, 0.7, 1 (mm), and Feed Rate 100, 125 and 150 (mm/s). The results of the SLD study used a variable helix angle of 35/38 degrees at a feed rate variation of 100 mm / minute chatter at cut depths of 1, 0.7 and 0.7 mm, at a feed rate variation of 125 mm / minute chatter at a cut depth of 0.7, 1 and 0.7 mm. At feed rates of 150 mm/min at cut depths of 1, 1, and 0.7 mm with spindle speeds equal to 2000.2500 and 3000 RPM. While VHA results of 36/38 degrees at a feed rate of 100 mm / minute experienced chatter at cut depths of 0.7.1 and 1 mm, at feed rates of 125 mm / minute chatter at cut depths of 1.1 and 0.7 mm. At a feed rate variation of 150 mm/min chatter at cut depths of 1.1, and 0.7 mm with the same spindle speeds of 2000.2500 and 3000 RPM.Keywords : Chatter, VHA, SLD, microcontrolle, FFT
Tensile Analysis of Epoxy Resin Composite Material with Petung Bamboo Strip Reinforcement Bethony, Frans Robert; Pineng, Marthina; Paliling, Formanto; Simon, Christof Geraldi
INTEK: Jurnal Penelitian Vol 10 No 2 (2023): October 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v10i2.4578

Abstract

This study aims to analyze the optimal tensile strength of epoxy resin composite material with woven bamboo strips (Dendrocalamus asper). Petung bamboo is made in strips measuring 0.01 cm, 0.1 cm wide, 45 cm long and then woven then soaked in brackish water with variations of soaking for 0, 1, 2, 3, and 4 weeks with river water salinity levels of 10, 20 and 30%. The printed composite material with a composition of 60% epoxy resin and 40% catalyst as a hardener with  1, 2, and 3-layer woven strips and held for 24 hours. Composite material printing by hand lay-up method. For 1 layer of woven composite material, epoxy resin is poured into a mold then woven petung bamboo strip and covered with epoxy resin pressed for 24 hours. The composite material is removed from the molded container and then left in an outdoor airtight room for one week. Composite materials are repaired to ascertain whether there are still defects or no longer exist, especially on the surface of composite materials. The next process is the manufacture of test samples, for tensile tests based on ASTM (D638-02) Before the test is carried out, the sample is repaired first to ensure that the sample is in a standard state to be ready for testing.  Test results of optimal tensile strength of composite materials with woven reinforcement of petung bamboo strips without immersion of 1 layer (40.22 MPa), 2 layers (50.13 MPa), and 3 layers (60.07 MPa). The optimal tensile strength of composite materials with 1 layer of webbing and soaking time of 3 weeks (51.08 MPa) has increased (19.12%). The optimal tensile strength of composite materials with 2-layer webbing and soaking time of 2 weeks (61.05 MPa) has increased (20.69%). The optimal tensile strength of composite materials with 3-layer webbing and soaking time of 2 weeks (70.15 MPa) has increased (19.08%). Keywords: composite material, bamboo petung, woven strip, brackish water, tensile strength
Design of Experiments (Doe) on Suspension Test Equipment of One Part Of A Vehicle Wheel Using The Taguchi Method Simon, Christof Geraldi; Paliling, Formanto; Lasarus, Risa; Salo, Lery Alfriany; Bethony, Frans Robert; ka’ka, Simon
INTEK: Jurnal Penelitian Vol 10 No 2 (2023): October 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v10i2.4581

Abstract

Suspension is the most important thing that must be taken into account because it greatly affects driving comfort on the road. The working mechanism of the suspension consisting of spiral springs and shock absorbers is loaded vertically from the weight of the body, driver, and passengers. The uneven shape of the road surface in the form of potholes or bumps will greatly affect the comfort of the driver. This study aims to determine the effect of suspension work and the optimal value of vibration that occurs on one of the wheels of the vehicle against vertical dynamic loads. The method used in this study uses the Taguchi method which is used to determine the optimum dynamic load conditions against vibration in the suspension system.   The characteristics used in this method are "Smaller is better". Several variables such as bump height, tire pressure on the wheels, as well as vehicle body weight and passenger weight are necessary factors to calculate optimal dynamic load conditions against vibration in the suspension. Based on the results of the optimum value conditions obtained, namely the height of the mound of 5 cm, tire pressure of 32 Psi, load of 84 kg, and dynamic load of 71 kg. From the results of the contribution rate to the ANOVA obtained, factor A (bump height) and factor D (dynamic load) are significant factors while factor B (tire pressure) and factor C (load load) are insignificant factors. Under optimal conditions, there was a decrease in suspension vibration value by 49.65%.
Comparison of The Pull Strength of Sisal Lamina Matrix Polymer Fiber Composite Materials (Agave Sisalana) Fikran, FIkran; Simon, Christof Geraldi; ka’ka, Simon
INTEK: Jurnal Penelitian Vol 10 No 2 (2023): October 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v10i2.4582

Abstract

Composites are one of the material engineering technologies developed today because composites can combine several material properties that differ in characteristics into new properties by the planned design. The purpose of this study was to determine the mechanical properties of the influence of the combined arrangement of lamina angle variations and the composition of fiber and matrix mixtures. This study uses polyester resin, catalyst, and sisal fiber as materials in the manufacture of composite materials. In specimen manufacturing refers to ASTM D 638-02 type 3 test standard for tensile tests. The tensile test results of sisal fiber lamina composite materials assuming a composition ratio of 5% fiber and 95% resin produce maximum tensile stress of m = 16.9854 N/mm2 and a maximum strain of ɛ = 4.5232% while assuming a composition ratio of 15% fiber 85% resin produces maximum tensile stress of sm = 40.1422 N/mm2 and maximum strain of ɛ = 8.9744 %, Based on the test results, the addition of fiber mixture composition increases the tensile strength and toughness of the material. The composition of 5% fiber 95% and 15% fiber 85% resin (15S-85R)produces a maximum tensile stress of sm =  45.1823 N/mm2 and a maximum strain of ɛ = 9.6849 % with a maximum load Fm = 10902.4996 N. The more fiber contained in the sisal fiber lamina composite material, the higher the tensile stress produced, this shows the tension is directly proportional to the number of fibers contained in the composite.
The Effect of Clay, Alumina, and Starch Composition on The Characteristics of Thermal Insulation Cylinders Suluh, Sallolo; Bethony, Frans Robert; Simon, Christof Geraldi; Gallaran, Ferayanti Boas; Aket, Paulus; Pasampa, Enos
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.6176

Abstract

Efficient thermal insulation materials are crucial in improving performance, minimizing energy consumption, and maintaining safety in various industrial applications. This study examines the impact of multiple combinations of clay, alumina, and starch on the properties of thermal insulation cylinders. Five different composite samples were prepared by adjusting the percentages of clay and alumina while maintaining a consistent starch content. The samples were subjected to comprehensive tests to assess their water content, density, and porosity. Based on the findings, it was observed that as the alumina content increased, the water content and density of the composite materials decreased while their porosity increased. The sample labeled C6-A2 had the highest water content (9.19%) and density (1,087.04 kg/m³), while the sample labeled C2-A6 had the lowest water content (8.69%) and density (1,069.93 kg/m³). The range of porosity values observed was between 25.67% and 26.60%. It was observed that an increase in alumina content resulted in a corresponding increase in porosity. The findings indicate that the larger particle size and lower cohesion of alumina result in a more porous microstructure, affecting the material's overall properties. This study offers valuable insights into the composition optimization of clay, alumina, and starch to create customized composite materials suitable for various industrial applications. It focuses on achieving a delicate balance between water resistance, structural integrity, and thermal insulation
Co-Authors Aket, Paulus Ferayanti Boas Gallaran Fikran, Fikran Formanto Paliling Frans Robert Bethony Hardinsi, Festo Andre ka’ka, Simon Lasarus, Risa Pasampa, Enos Pineng, Marthina Salo, Lery Alfriany Suluh, Sallolo