Analisa Tegangan Kerusakan pada Pin Hopper
DOI:
https://doi.org/10.29122/mipi.v8i1.3644Keywords:
Hopper, Bend, Fall, FEA,, Pin 70 mmAbstract
Hopper pada Stage Regenerator mengalami kerusakan berupa jatuh dan robek. Hal ini disebabkan karena lepasnya salah satu pin yang menjadi tumpuan hopper. Setelah diperiksa ternyata pin tersebut bengkok dan salah satu stoppernya lepas.Dilakukan penelitian dengan analisa tegangan menggunakan Finite Element Analysis (FEA) dengan menggunakan type elemen plat untuk memodelkan shell Hopper dan solid elemen untuk Pin. Analisa tegangan dilakukan pada model Hopper untuk menentukan beban yang bekerja pada Pin kemudian dilakukan FEA pin untuk menentukan tegangan yang terjadi pada pin. Hasil perhitungan: Rupture allowable stress/Sr untuk 100.000 jam operasi sebesar 3,2 ksi (2,24 kg/mm2). Karena tegangan yang terjadi pada pin disebabkan oleh bending maka tegangan yang terjadi harus lebih kecil dari 1,5 Sr = 3,36 kg/mm2, jadi dari FEA distribusi tegangan Pin yang dipakai harus diameter 70 mm.
Kata kunci :Â Hopper, Pin bengkok, Jatuh, FEA, Pin 70 mm.
Abstract
Hopper at the stage regenerator failed due to falling and break, after visual examination it is found that the pin is bent and a stopper goes out. It is then conducted stress analysis using Finite Element Analysis (FEA) by means of plate element mode to model the hopper cell and solid element of the pin stress analysis is conducted for modelling the hopper is to determine working load on the pin followed by FEA to determine stresses taking place on the pin the calculation result are: rupture allowable stress (SR) for 100.000 operation hours is 3.2 Ksi (2.24 kg/mm2). As stress on the pin is caused by bending, the stress should be lower than 1.5 SR or 3.36 kg/mm2, and from FEA stress distribution on the pin should use pin with 70 mm in diameter.
Keywords : Hopper, Bend, Fall, FEA, Pin 70 mm
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