Abstract
The autofrettage process enhances the carrying capacity and fatigue lifetime of pressure vessels by increasing their residual stress. A compound cylinder was introduced in order to increase residual stress. An autofrettaged compound cylinder can resist a higher pressure than a single cylinder having the same dimension. This residual stress can be measured through experimental or calculation processes. In this study, residual stress analysis of an autofrettaged compound cylinder was conducted. The elastic-perfectly plastic and strain hardening models were investigated. The residual stress distribution of the autofrettaged compound cylinder with shrink fit tolerance was predicted. Shrink fit is a very efficient way to extend compressive residual stress. The compressive residual stress of the strain-hardening model is smaller than that of the elastic-perfectly plastic model because of the Bauschinger effect. The compressive residual stress of the strain hardening model decreased by up to 80% overstrain level.
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This paper was recommended for publication in revised form by Associate Editor Jooho Choi
Eun-Yup Lee received a B.S. degree in Mechanical Design Engineering from Chungnam National University, Korea in 2007. He received master degree in Mechanical Design Engineering from Chungnam National University, Korea in 2009. He is currently researcher of LG Display company, Korea.
Young-Shin Lee received a B.S. degree in Mechanical Engineering from Younsei University, Korea in 1972. He received master and Ph.D. degree in Mechanical Engi-neering from Yonsei University, Korea in 1974 and 1980 respectively. He is currently professor and Dean of Industry Graduate School and Director of BK21 Mechatronics Group at Chungnam National University, Korea. Prof. Lee’s research interests are in area of impact mechanics, optimal design, biomechanical analysis and shell structure analysis.
Qiu-Ming Yang received a B.S. degree in Mechanical Design Engineering from Dalian Polytechnic University, China in 2007. She received master degree in Mechanical Design Engineering from Chungnam National University, Korea in 2009.
Jae-Hoon Kim received a B.S. degree in Precision Mechanical Engineering from Chungnam National University, Korea in 1980. He received master and Ph.D. degree in Mechanical Engineering from Chungnam National University, Korea in 1982 and 1989 respectively. He is currently professor at Chungnam National University, Korea. Prof. Kim’s research interests are in area of fracture mechanics, fatigue behaviors, composite materials.
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Lee, EY., Lee, YS., Yang, QM. et al. Autofrettage process analysis of a compound cylinder based on the elastic-perfectly plastic and strain hardening stress-strain curve. J Mech Sci Technol 23, 3153–3160 (2009). https://doi.org/10.1007/s12206-009-1009-9
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DOI: https://doi.org/10.1007/s12206-009-1009-9