Universal Journal of Engineering Science(CEASE PUBLICATION) Vol. 5(3), pp. 44 - 55
DOI: 10.13189/ujes.2017.050302
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Optimum Autofrettage Pressure for a High Pressure Cylinder of a Waterjet Intensifier Pump

Hakan Çandar ^*, İ. Hüseyin Filiz
Department of Mechanical Engineering, University of Gaziantep, Turkey

ABSTRACT

This study presents analytical approach for the determination of optimum autofrettage pressure of a thick walled cylinder which is commercially used as a high pressure cylinder of a waterjet intensifier pump. Bilinear kinematic hardening model is used in the derivation of analytical model based on plane strain, Von-Mises yield criteria and incompressible volume assumptions. Elasto-plastic radius is dependent on autofrettage pressure and optimum value of autofrettage pressure is found as a value that will give minimum value of maximum Von-Mises stress on the wall of the cylinder under operating pressure. Hence, considering elasto-plastic radius as the design variable, its optimum value is determined for the specified operating pressure. Reverse yielding owing to Bauschinger effect is used as the only non-linear constraint, Matlab© optimtool finds optimum value of the elasto-plastic radius and the corresponding autofrettage pressure is then calculated. By using ANSYS 15©, stress analysis of the autofrettaged cylinder has been performed and the results obtained from both methods are found to be almost the same.

KEYWORDS
Autofrettage, Kinematic Hardening, Bauschinger Effect, Optimization, FE Analysis

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Hakan Çandar , İ. Hüseyin Filiz , "Optimum Autofrettage Pressure for a High Pressure Cylinder of a Waterjet Intensifier Pump," Universal Journal of Engineering Science(CEASE PUBLICATION), Vol. 5, No. 3, pp. 44 - 55, 2017. DOI: 10.13189/ujes.2017.050302.

(b). APA Format:
Hakan Çandar , İ. Hüseyin Filiz (2017). Optimum Autofrettage Pressure for a High Pressure Cylinder of a Waterjet Intensifier Pump. Universal Journal of Engineering Science(CEASE PUBLICATION), 5(3), 44 - 55. DOI: 10.13189/ujes.2017.050302.