ANALISA TEGANGAN PUNTIR POROS MIXER OLI STUDI KASUS DI PT. ALP PETRO INDUSTRI

ANALYSIS OF THE TORSIONAL STRESS ON THE OIL SHAFT CASE STUDY IN PT. ALP PETRO INDUSTRY

Johan Ady Setyawan Indar Putra (6310030032)


Abstrak

ABSTRAK Tugas akhir ini membahas mengenai tegangan puntir poros pada mixer oli. Poros mixer oli ini berjenis poros transmisi dan poros ini berbentuk lurus. Poros transmisi ini merupakan merupakan poros yang menyalurkan daya ke motor. Pada proses transmisi, poros berputar hingga menghasilkan torsi. Tugas akhir ini menganalisa tegangan puntir poros pada mixer oli. Metode-metode yang digunakan dalam menganalisa tegangan puntir pada poros mixer oli adalah membuat diagram benda bebas terlebih dahulu sebelum melakukan perhitungan. Perhitungan yang terdapat pada tugas akhir ini bertujuan untuk mengetahui hubungan tegangan puntir maksimal dengan tegangan ijin pada material. Di dalam analisa tegangan puntir perhitungan-perhitungannya mencakup torsi tiap-tiap elemen, torsi yang dihasilkan motor, tegangan puntir yang dihasilkan, tegangan puntir maksimal dan sudut defleksi poros. Dari hasil perhitungan-perhitungan tersebut dapat diketahui besarnya torsi tiap-tiap elemen : T_AB = 102,3 Nm, T_BC = 81,9 Nm, dan T_CD = 75 Nm. Tegangan puntir yang dihasilkan tiap-tiap elemen : ?_AB= 8141 kPa, ?_BC= 6517 kPa, dan ?_CD= 5968 kPa. Tegangan puntir maksimal tiap-tiap elemen : ?_(max?(AB)) = 1 Mpa, ?_(max?(BC)) = 0,8 Mpa, dan ?_(max?(CD)) = 0,7 Mpa. Tegangan ijin material 41 Mpa. Sudut defleksi tiap-tiap elemen : ?_AB = ?_BC = 4,73 ?,?_CD = 2,3 ? dan ? = 11,6 ? (Sudut keseluruhan defleksi poros). Dan hasil analisa juga perhitungannya menunjukkan bahwa tegangan puntir maksimal lebih kecil dari tegangan ijin. Kata Kunci : Torsi, Tegangan Puntir, Tegangan Puntir Maksimal, dan Sudut Defleksi poros.


Abstract

ABSTRACT The final task explores the mixer shaft oil. This oil mixer shaft is type of transmission shaft and the shaft form is a straight. The transmission shaft is a shaft that supply power to the motor. In the process the transmission shaft is produce a torque. This final task analyzes the goal of torsional stress on the mixer shaft oil. The methods are used in analyzing the torsional stress on the mixer shaft oil is making free body diagram first before doing the calculations. The calculation are contained in this final task to determine the relationship of the maximum torsional stress with allowable stress in the material. In the torsional stress analysis the calcuilations include each element of torque, the motor torque generating, the resulting torsional stress, maximum torsional stress and deflection angle shaft. From the results of these calculations can be seen the magnitude of each element Torque : T_AB = 102,3 Nm, T_BC = 81,9 Nm, dan T_CD = 75 Nm. Each element of Torsional stress : ?_AB= 8141 kPa, ?_BC= 6517 kPa, dan ?_CD= 5968 kPa. Each element of Maximum stress : ?_(max?(AB)) = 1 Mpa, ?_(max?(BC)) = 0,8 Mpa, dan ?_(max?(CD)) = 0,7 Mpa. The allowable stress 41 Mpa. Each element of Deflection angle on the mixer shaft : ?_AB = ?_BC = 4,73 ?,?_CD = 2,3 ? dan ? = 11,6 ? (All of the deflection angle on the mixer shaft). Finally the calculation results of the analysis also shows the maximum torsional stress smaller than allowable stress. Keywods : Torsion, Torsional Stress, Maximum Torsional Stress, and deflection angle of shaft. ABSTRACT The final task explores the mixer shaft oil. This oil mixer shaft is type of transmission shaft and the shaft form is a straight. The transmission shaft is a shaft that supply power to the motor. In the process the transmission shaft is produce a torque. This final task analyzes the goal of torsional stress on the mixer shaft oil. The methods are used in analyzing the torsional stress on the mixer shaft oil is making free body diagram first before doing the calculations. The calculation are contained in this final task to determine the relationship of the maximum torsional stress with allowable stress in the material. In the torsional stress analysis the calcuilations include each element of torque, the motor torque generating, the resulting torsional stress, maximum torsional stress and deflection angle shaft. From the results of these calculations can be seen the magnitude of each element Torque : T_AB = 102,3 Nm, T_BC = 81,9 Nm, dan T_CD = 75 Nm. Each element of Torsional stress : ?_AB= 8141 kPa, ?_BC= 6517 kPa, dan ?_CD= 5968 kPa. Each element of Maximum stress : ?_(max?(AB)) = 1 Mpa, ?_(max?(BC)) = 0,8 Mpa, dan ?_(max?(CD)) = 0,7 Mpa. The allowable stress 41 Mpa. Each element of Deflection angle on the mixer shaft : ?_AB = ?_BC = 4,73 ?,?_CD = 2,3 ? dan ? = 11,6 ? (All of the deflection angle on the mixer shaft). Finally the calculation results of the analysis also shows the maximum torsional stress smaller than allowable stress. Keywods : Torsion, Torsional Stress, Maximum Torsional Stress, and deflection angle of shaft.


Detil Peneliti

Dosen Pembimbing 1 :Adi Wirawan Husodo
Dosen Pembimbing 2 : Adi Wirawan Husodo

Program Studi : D3 - TEKNIK PERMESINAN KAPAL
Angkatan : 2010


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