A residual stress analysis program using a Matlab GUI on an autofrettaged compound cylinder |
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Authors: | Qiu-Ming Yang Young-Shin Lee Eun-Yup Lee Jae-Hoon Kim Ki-Up Cha Suk-Kyun Hong |
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Affiliation: | (1) PreStress Engineering Division, Integrity Testing Laboratory Inc., 80 Esna Park Drive, L3R 2R7 Markham, Ontario, Canada |
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Abstract: | A program for the residual stress analysis of an autofrettaged compound cylinder is designed using a Matlab graphical user
interface (GUI) and program design technique. The high-pressure vessels are autofrettaged in order to increase their operating
pressure and fatigue life. An autofrettage process causes plastic expansion of the inner section of the cylinder, adding residual
compressive stress to the bore after relaxation. Such a compound cylinder is produced via a shrink-fit procedure that incorporates
a monobloc tube that has previously undergone autofrettage. This paper presents a simple and visual tool to calculate the
residual stress and describe the distribution of residual stress for both the elastic-perfectly plastic model and the strain-hardening
model. |
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