Lubis, Asnawi and Akmal, Jamiatul (2008) Stress Concentration Factors of SteppedShafts of Circulartosquare Cross Section under Twisting Moment. Jurnal Teknik Mesin Indonesia, 3 (2). pp. 4852. ISSN 1907350X

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Abstract
Shaft is a machine element whose main function for power transmission. Shaft is often needed in stepped form (change in crosssection). For a nonsmooth shaft (stepped shaft),the elementary stress equations are no longer hold for calculating the actual stress as the stress would be higher than the nominal stresses. Tb relate the maximum stress at the discontinuity with the nominal stress calculated using the elementary stress equation, a factor is needed which is called stress concentration factor (SCF). This paper presents a graph for design purpose of stress concentration factor of stepped shaft of circulartosquare crosssection under twisting moment. The graph was derived from an extensive linier finite element parametric study and presented in line of the wellknown Peterson's graph for stepped shaft of uniform circular crosssection. Finite element parametric study was carried out for every combination of diameter to diagonal ratio, D/d and radius of fillet to diagonal ratio, r/d. For geometry with particular D/d value, six analyses were done by varying the r/d value. Stress distribution shows that maximum shearing stress located at the root of square, exactly at midside. In general graphical design similar to the well known Peterson graph was produced.
Item Type:  Article 

Subjects:  A General Works > AC Collections. Series. Collected works 
Divisions:  Fakultas Teknik (FT) > Prodi Teknik Mesin 
Depositing User:  Dr Asnawi Lubis 
Date Deposited:  22 Aug 2016 09:00 
Last Modified:  22 Aug 2016 09:00 
URI:  http://repository.lppm.unila.ac.id/id/eprint/382 
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