Margaretha, Cendy (2020) Analisis Kegagalan Excavator Arm Pada Kondisi Operasi Hard Clay Soil. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Arm merupakan bagian excavator yang berfungsi sebagai penghubung antara bucket dengan boom. Salah satu bagian arm yang sering mengalami kerusakan terdapat pada penghubung antara arm dengan boom akibat tegangan tekan dan bending selama operasi pengangkatan dan penggalian. Pada bagian tersebut memiliki luas penampang yang kecil dibandingkan dengan body arm, sehingga mengalami stress paling besar.
Pada penelitian ini dilakukan analisis kinematik dan dinamik pada excavator arm sehingga hasil simulasi mendekati kondisi operasi. Dimana kondisi operasi ditinjau dari boom, arm dan berujung pada bucket dari excavator yang dimodelkan menggunakan software 3D Modelling, kemudian di assembly dengan 3D model Excavator. Setelah itu, hasil perhitungan pembebanan akan disimulasikan dengan metode elemen hingga untuk mengetahui equivalent stress dan factor of safety. Dalam penelitian ini, excavator akan dikondisikan dalam dua kondisi (kondisi maksimal excavator bekerja) yaitu kondisi pertama dan kondisi kedua dengan variasi sudut θ3 adalah 293,09o; 279,7o; 266,32o; dan 252,93o.
Hasil penelitian menunjukkan bahwa nilai equivalent stress yang terjadi pada kondisi dua lebih besar daripada nilai equivalent stress yang terjadi pada kondisi satu. Dimana letak equivalent stress maksimum terjadi pada bagian penghubung antara arm dengan boom. Dari setiap kondisi yang diuji, terdapat dua posisi yang dinyatakan aman untuk dilakukan pengoperasian excavator terhadap tanah hard clay yaitu pada sudut θ3 sebesar 293,09o dimana saat kondisi satu sudut θ2 sebesar 61,64o dan sudut θ4 sebesar 253,58o dan saat kondisi dua dimana sudut θ2 sebesar 356,28o dan sudut θ4 sebesar 10o.
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The arm is the excavator part that functions as a link between bucket and boom. One part of the arm that is often damaged is the connection between the arm and the boom due to compressive and bending stresses during lifting and digging operations. In that section has a small cross-sectional area compared to the body of the arm, so that it experiences the greatest stress.
In this research, a kinematic and dynamic analysis is performed on the excavator’s arm so that the simulation results approach the operating conditions. This operating condition is reviewed from the boom, arm, and ends in the bucket of the excavator which modeled using 3D Modeling Software, and then assembly with 3D Model Excavator. Then, the calculation result of loading will be simulated with the finite element method to determine the equivalent stress and the safety factor. In this research, the condition of the excavator boom, arm, and bucket will be conditioned in two conditions (maximum condition of the excavator working) are the first condition and the second condition with the variation of angle θ3 are 293,09o; 279,7o; 266,32o; and 252,93o.
The result shows that the equivalent stress value that occurs in condition two is greater than the equivalent stress value that occurs in condition one. Where is the maximum equivalent stress lies in the connection between the arm and the boom. For each condition tested, there are two positions which are declared safe for excavator operation on hard clay soil, that are at an angle θ3 is 293,09o when the condition one angle θ2 is 61,64o and the angle θ4 is 253,58o and at condition two where the angle θ2 is 356,28o and the angle θ4 is 10o.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Arm, boom, bucket, equivalent stress, excavator, factor of safety, dan kinematis. =================================================================================================== Arm, boom, bucket, equivalent stress, excavator, factor of safety, and kinematic. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA169.5 Failure analysis |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | cendy margaretha |
| Date Deposited: | 23 Aug 2020 03:24 |
| Last Modified: | 10 Nov 2023 11:24 |
| URI: | http://repository.its.ac.id/id/eprint/80177 |
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