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Asbar R
Universitas Syiah Kuala
Mechanical Engineering

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Sistem Penggerak Mesin Setengah Pengering (Tipe Vertikal) Asbar R
Jurnal Teknik Mesin Unsyiah Vol 1, No 2 (2012)
Publisher : Jurnal Teknik Mesin Unsyiah

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Abstract

The half drying machine is a machine utilised to reduce the additional water content in the raw material. The design of the mechanical system is required that the machine is able to work appropriately. The mechanical system is a combination of machine elements which work as the source of power and rotation in the mechanical work which is the forwarded to the additional water content reducing mechanism. The design process is carried out through semantic, graphical and analytical methods which result in appropriate machine elements selection, i.e. electric motor, driver pulley, belt, driven pulley, pin, driven shaft, single line radial ball bearing and the house, single line axial bearing and the house, and the bolt and nut. All of the elements are in a unity with their own support frame which is able to be separated if required. The additional water content reducing process of raw material occurs due to the effect of rotation of the machine to the material.
Analisis Penjalaran Retakan pada Pipa Transmisi Gas Jenis SUS 304 Menggunakan Metode Elemen Hingga Asbar R
Jurnal Teknik Mesin Unsyiah Vol 1, No 1 (2012)
Publisher : Jurnal Teknik Mesin Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (17.41 KB)

Abstract

A method developed to predict the failure that occurs at gas transmission pipe caused by loading with peak angle crack opening is described in this paper. There are two aspects become the main consideration; the maximum crack peak angle opening for the given load and space, and the determination of the critical stress intensity factor to search at what degree of loading the crack on the gas transmission pipe experiencing creep or failure. This research uses arc-shaped tension specimen and the analysis is carried out by finite element method using ansys ™ rel 5.4. In order to get the stress intensity factor, the loading is varied from 1 KN to 160 KN. Based on finite element method, the maximum stress intensity factor occurs at the range of loading of 16-160 KN, which is 5.67 x 1016 MPa.m1/2, and the minimum factor occurs at the range of loading of 0.5-1 KN, which is 3.76 MPa.m1/2. The stress intensity factor result is also validated with the analytical result. The maximum crack peak angle opening occurs at the range of loading of 16-160 KN which is 250, the stage that is able to cause pipe failure.
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