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Tono Sukarnoto, Tono
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Analisis Distribusi Tegangan Pada Kepala Baut Dengan Variasi Filet Menggunakan Metode Fotoelastisitas Sukarnoto, Tono; Soeharsono, Soeharsono
MESIN Vol 9, No 3 (2007): Ocean Thermal Energy Conversion (OTEC) untuk "Pulau-pulau Kecil"
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Stress Distribution Analysis on Bolt Head with Various Fillets Using PhotoelasticityMethod. A geometry modification can be use to reduce stress concentration. This research isinvestigating the influence offillet radius in the head ofbolt. Different than most commonbolt, thefillet ismade at the bottom surface of head around its neck. To show the stress distribution we use classicalexperimental mechanics method, photo elasticity. Loading comesfrom a lead screw and measured by aload cell connected to a computer data logger. As the result, a 5 mm fillet radius may reduce maximumshear stress up to 35%than nofillet radius, so its effective to minimize stress concentration in head bolt.
Analisis Kekuatan Struktur Penopang Overhead Crane Kapasitas 2 x 20 Ton Supryanto, Joni; Sukarnoto, Tono; Soeharsono, Soeharsono
MESIN Vol 10, No 1 (2019): Optimization in Renewable-Energy Conversion and Mechanical Design for National
Publisher : Universitas Trisakti

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This research investigated the design of the overhead crane supports with capacity of 2 x 20 ton. The crane design was modeled using both solids and surfaces, and the analysis was performed with finite element method. The results from the analysis verified the stress level, deflection level from crane column and runway beam, and the critical load of buckling for crane column to prevent the structure failure. The stress level result was compared to the material yield strength to find out whether or not  the design is safe. It is concluded that the stresses arising from the rail beam and column are still within the permissible limits so that the design is safe to use.
Simulasi Getaran Sistem Diskrit Satu Derajat Kebebasan Rizky, Vega Amalia Eka; Ganesha, Muhammad; Sukarnoto, Tono; Soeharsono, Soeharsono
MESIN Vol 10, No 1 (2019): Optimization in Renewable-Energy Conversion and Mechanical Design for National
Publisher : Universitas Trisakti

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Equipment has been made to simulate a discrete system vibration of one degree of freedom. The aim is to obtain equipment for learning for students in the field of mechanical vibration. Vibration simulation includes free vibration and forced vibration of discrete system in one degree of freedom. The main parts of this equipment are rigid rods with mass of 2.6 kg, vibrators with mass of  3.385 kg, spring with stiffness of 3738 N/m and loading masses. A rigid rod of 0.775 m in length is supported by a hinge on one end and hung on a spring in another position. The vibrator is rotated by an electric motor and the rotation can be adjusted from 90-1600 rpm. The vibrator is mounted on a rigid object at the position of 0.285 m, 0.385 m, 0.485 m and 0.585 m from the hinge. A spring with stiffness of 3738 N/m is placed on a rigid object at the position of the hinge. The loading masses of 1.08 kg and 2.08 kg are mounted on a rigid beam in a row at the position of 0.685 m from the hinge. For the free vibration experiments, the natural frequency for each position of vibrator is searched experimentally and theoretically. It is found that the results of the two are similar. For the forced vibration experiments, graphs of vibrational responses are constructed in the frequency domain, then the resonance frequencies are compared to the natural frequency results from the free vibration experiment. Apparently the results are very close. This shows that the research equipment made is reliable and can be used as a student learning tool.
Analisis Kekuatan Struktur pada Gerbong Datar Andreas, Teddy; Sukarnoto, Tono; Soeharsono, Soeharsono
MESIN Vol 10, No 1 (2019): Optimization in Renewable-Energy Conversion and Mechanical Design for National
Publisher : Universitas Trisakti

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Abstract

The PPCW railroad flatcars is railroad flatcars used to transport container loads with a maximum load capacity of up to 42 tons. In its use, these railroad flatcars are used to transport the cement bags in the pallet arrangement resulting in crack in the bottom frame of the PPCW railroad flatcars structure. The purpose of this analysis is to find out stress value and deformation value that occurred in the railroad flatcars due to the cement bags loading. The analysis process begins with modeling according to the original size of the railroad flatcars which is then followed by providing the support, gravity, loads, and material specifications used. Based on the result of analysis that has been obtained from the load of cement bags of 546,000 N and ratchet lashing of 900,000 N on the frame of PPCW railroad flatcars, we obtained the maximum von Mises stress value of 231.91 MPa arising on the bottom frame of the PPCW railroad flatcars structure as the site of cracking and the maximum total deformation value of 19.526 mm arising in the center of the railroad flatcars. The PPCW railroad flatcars made from SS400 with yield strength value of 245 MPa. Therefore, it was found that the value of stress arising in the railroad flatcars is still in the safe area and is allowed.