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Media Mesin : Majalah Teknik Mesin
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This is an Open Access Journal

Open Access journal
ISSN (Print) 1411-4348 - ISSN (Online) 2541-4577
Published by Universitas Muhammadiyah Surakarta

[33 journals]

STRESS ANALYSIS OF SUSPENSION BRACKETS ON A 12-METER ELECTRIC BUS USING
THE FINITE ELEMENT METHOD
- Authors: Rifky Zaidani, Mochamad Mas'ud
  Pages: 71 - 81
  Abstract: One of the optimization techniques that can be carried out by an engineer in designing a vehicle chassis is to reduce the weight of the chassis itself while still considering several performance targets that must be met, especially in terms of vehicle safety. In this article the author uses the Finite Element Method (FEM) to determine the strength of a component that plays an important role in determining vehicle safety, namely the Rear Axle Suspension Bracket using Ansys and Inventor to create a 3D model of the component, then the author compares the 2 bracket models with the type of material and thickness which was made to find out the stress of the material. One of the parameters that the author uses in determining the Design safety of the two bracket models is the Factor of Safety, Deformation, and Equivalent Elastic Stress values. The results that the authors get showed that the value of the Factor of Safety of bracket Model 1 with the same material as the bracket Model 2, that is 6 mm thick plate is 1.48 or still within the value required by PT. INKA is 1.4 to 1.8 and for the Equivalent Elastic Stress value of 166 MPa or still below the maximum value limit for SS400 material, which is 250 MPa.
  PubDate: 2023-07-27
  DOI: 10.23917/mesin.v24i2.22368
  Issue No: Vol. 24, No. 2 (2023)
EFFECT OF QUENCHING MEDIA VARIATIONS ON THE HARDNESS AND MICROSTRUCTURES
OF AISI O1 TOOL STEEL
- Authors: Hariningsih -, Desi Gustiani, Sutiyoko -
  Pages: 82 - 89
  Abstract: Tool steels AISI O1 are widely used in the manufacturing industry to produce a wide variety of tools, moulds, and other applications requiring high wear resistance. Wear resistance is identic with high hardness, and the combination can be obtained by hardening-tempering and cryogenic treatment. However, cryogenic treatment requires liquid nitrogen, which is relatively expensive. Therefore, this study aims to determine whether to cool to produce high hardness, which is close to the hardness value of 69 HRC due to cryogenic treatment. The hardening process was carried out by heating the steel at a temperature of 880 °C and holding it for 30 minutes, then quenching using air, oil SAE 10, water with 15% salt, and ice water. The microstructure of the test sample was observed with an optical microscope, and the hardness was tested with a Rockwell hardness tester. The test results showed that the microstructure changed from pearlite and ferrite to bainite and martensite after hardening-quenching. The lower the quenching media temperature, the higher the hardness. Ice water quenching resulted in a fully martensitic structure, and the highest hardness was 66.37 HRC. Ice water is a quenching medium that can produce hardness almost close to the hardness of cryogenic treatment.
  PubDate: 2023-07-27
  DOI: 10.23917/mesin.v24i2.22191
  Issue No: Vol. 24, No. 2 (2023)
INVESTIGATION OF THE EFFECT OF MESH SIZE AND FRACTION VOLUME ON BENDING
STRENGTH CHARACTERISTICS OF GEOPOLYMER COMPOSITE
- Authors: Ridwan Afandi, Muhammad Munadi, Fajar Paundra, Sri Hastuti, Akhmad Nurdin
  Pages: 90 - 95
  Abstract: Composite material is a material consisting of two or more type materials that have different properties, by combining macroscopically, and good interfacial bonds from one material to another. Currently, polymer composite materials are widely applied in the land, sea, and air transportation industries, moreover polymer composites with fire resistance properties have been developed with the addition of geopolymer that has the advantage of producing high performance. This study aims to determine the effect of mesh size and volume fraction of lightweight brick powder on flexural strength. The benefits of this research directly increase the economic value of lightweight brick waste and produce a tough advanced material at a low cost. The composite filling material used lightweight brick waste and sieved using a sieve with a level of 50, 100, 150, and 200 at a volume fraction of 45%, and a volume fraction of 0%, 15%, 30%, 45%, and 60% at a mesh 200. While the composite matrix used the thermoset polymer Ripoxy R-804. Based the result, addition of lightweight brick powder with variations in particle size of the lightweight brick powder and volume fraction showed a decrease in flexural strength resistance compared to those without lightweight brick powder.
  PubDate: 2023-07-27
  DOI: 10.23917/mesin.v24i2.21865
  Issue No: Vol. 24, No. 2 (2023)
EFFECT OF STAINLESS STEEL 304 TIG WELDING AMPERE ON STRESS CORROSION
CRACKING PHENOMENON
- Authors: Moch Chamim, Farit Ardiyanto
  Pages: 96 - 101
  Abstract: This article discusses the experimental results of stress corrosion cracking grade 304 stainless steel after GTAW welding under environmental corrosion simulation. The corrosion phenomenon that occurs is Stress Corrosion Cracking (SCC). The experimental method is a specimen welded using a current of 55, 60, and 65 Ampere respectively with a gas flow rate of 5 L/min argon shielding gas. The constant tensile loads of 2000 N and 4000 N in the state of the test object immersed for 2 x 24 hours in a solution of HCl + Aquades. Different Ampere and shielding gas flow rate parameters affected the cracks phenomenon. Vickers Hardness and Microstructure were used to evaluate the weld area. The lowest ampere of the weld results in maximum rough cracks from the surface and it's visible on the surface. The increased hardness of the 55 Ampere current specimen indicates a change in structure or phase after welding. The highest ampere produces fine cracks on all surfaces.
  PubDate: 2023-07-27
  DOI: 10.23917/mesin.v24i2.16366
  Issue No: Vol. 24, No. 2 (2023)
THE EFFECT OF TEMPERATURE VARIATION AND VARIOUS METAL MATERIALS ON
CONDUCTION HEAT TRANSFER RATE
- Authors: Handini Novita Sari, Ika Nurjannah, I Made Arsana, Ghaniy Amirul Dana, Moch. Variant Julianto
  Pages: 102 - 108
  Abstract: Thermal conductivity is the value of a material's ability to conduct heat. Heat transfer occurs due to the difference in temperature found in an object. Heat transfer can take place in three ways, namely conduction, radiation and convection. The purpose of this study was to determine the conduction heat transfer rate for 3 solid cylindrical materials, namely aluminum, iron, and brass. by varying the temperature 50 ℃, 55 ℃, 60 ℃, 65 ℃, 70 ℃, 75 ℃ and 80 ℃. The working principle in this experiment is to prepare 3 variations of solid cylinders, then place them on a thermal conduction trainer by adjusting the temperature of the test on the thermocontrol display (T1) in stages and the test results are obtained as shown by a digital thermometer (T2). From the test results, the results of the heat transfer rate have been found, for the metal material that has the greatest heat transfer rate is aluminum with a heat rate value of 479.7 Watt at 80 ℃, the second largest heat transfer rate value is aluminum with a heat transfer rate of heat is 299.7 Watt at 80℃ while for the material the smallest rate is found in iron material with a value of 214 Watt at 80℃. The average heat transfer rate for aluminum is 325.5 Watt, for an average heat transfer rate for iron is 147.1 Watt, and the average heat transfer rate of brass is 218.5 Watt.
  PubDate: 2023-07-27
  DOI: 10.23917/mesin.v24i2.21138
  Issue No: Vol. 24, No. 2 (2023)
SMART GATE DESIGN AND SHIP TICKETING WITH ANDROID APPLICATION
- Authors: Ardhi Fathonisyam Putra Nusantara, Hardian Oktavianto, Lutfi Ali Muharom
  Pages: 109 - 114
  Abstract: Automatic gate is a development of the digital world that aims to facilitate the lives of residents and reduce errors made by humans. Automation is made to connect humans with technology so that they can advance and develop. In general, the gate serves as a security mechanism. To facilitate human work, the automatic gate system technology is expected to be able to reduce human work, for example when a security guard opens a gate. The technology offered in this paper is a combination of automatic gate systems and sensors with ticketing applications at pioneer ports. This system is expected to be able to facilitate human work with the help of smartphones when using sea transportation at pioneer ports that operate automatically. The main thing that will be discussed in this paper is the gate design for the passenger. The result obtained is an automatic gate that is connected to the ticketing system, both web-based and mobile.
  PubDate: 2023-07-27
  DOI: 10.23917/mesin.v24i2.19339
  Issue No: Vol. 24, No. 2 (2023)
STRUCTURAL AND MECHANICAL CHARACTERIZATION OF TUNGSTEN NITRIDE COATINGS
PREPARED BY DC SPUTTERING AT CYLINDER LINER
- Authors: Haerul Ahmadi, Ihwanul Aziz, Dewi Lanita Sari, Idawati Supu
  Pages: 115 - 122
  Abstract: The cylinder liner is a tube that protects the piston and is a place for the combustion process. The combustion process causes continuous friction to make the cylinder liner wear out. Therefore the cylinder liner must be made of materials that have high hardness. To obtain a high hardness level, surface treatment with DC sputtering techniques is carried out. Surface treatment with DC sputtering technique for 120 minutes with variations of Argon gas and Nitrogen gas 70:30, 80:20, and 90:10. Based on the XRD test results, all treated samples contained a WN layer. The crystal structure of the raw material samples is hexagonal, and the crystal structure of all processed samples is cubic. Vickers hardness characterization shows that the raw material is 110.93 HV. While the sample treated with Ar70:N30 was 234.66 HV. The optimum hardness occurred in samples treated with Ar80:N20 with a hardness of 311.87 HV. However, the Ar90:N10 treatment experienced a decrease in hardness to 130.44 HV. Based on the results of thin film testing, WN affects the increase in the hardness of the cylinder liner material. This is evidenced by the increase in hardness in samples coated with WN.
  PubDate: 2023-07-27
  DOI: 10.23917/mesin.v24i2.20369
  Issue No: Vol. 24, No. 2 (2023)