Analisis Tegangan Bervariasi Periodik Pada Struktur Shell Rotary Steam Dryer
Abstract: There was a failure
in the inner part of a rotary dryer, more exactly around the weld joint between
drum and tube supports due to fatigue failure indicated by the existing of
cracks. To prevent or avoid this kind of failure in the future, it is important
to analyse this phenomenon in order to find out root of the problem.Through
this study the phenomenon of cracking in the rotary dryer learnt.The final goal
is to find out the alternative way out in a rotary dryer failure caused by
fatigue and try to give a recommendation
in prevention of the problem. Steps in this theses including literature study
related with the problem, also the analysis using finite element method (FEM).
Load and stress analysis using FEA was run in order to know the performance of
the rotary dryer in normal circumstance. Maximum load of 20 tons used with each 30o of rotation
checking points where a cycle is 360o. Stress and deformation gotten from the
same points then scaled and used as history data in software fatigue
calculation. The result of the finite element analysis found that the maximum
stress 42,21 MPa was above the fatigue strength of the material, 20 MPa,
implied to the life time of the rotary dryer that came shorter (9,3 years of 20
years design). Actually this rotary dryer fail after 8 years. Simulation using
17 tons load gave 15 years of life time.
Penulis: Rino Sukma, Khairul
Amri, Maimuzar Maimuzar, M Elfian Hadi
Kode Jurnal: jptmesindd110143
