Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Analysis of the Stress Characteristics of Double Layered Tube at Elevated Temperature

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  • 김은화 (부산대학교 정밀기계공학과/정밀정형 및 금형가공연구센터) ;
  • 장정환 (부산대학교 정밀기계공학과/정밀정형 및 금형가공연구센터) ;
  • 박성필 (현대하이스코, 기술연구소 경량화연구팀) ;
  • 문영훈 (부산대학교 기계공학부)
  • Received : 2010.08.11
  • Accepted : 2010.10.27
  • Published : 2010.11.01
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Abstract

Double layered tube that has been used for transportation and oil piping system is occasionally exposed to elevated temperature. The change in stress state at elevated temperature is important for the safe design of double layered tube. In this study, the variation of stress state for hydroformed double layered tube of which inner tube is stainless steel and outer tube is mild steel has been analytically analyzed. To characterize the thermal stress at elevated temperature, analytical model to provide thermal stresses between outer tube and inner tube was developed by using theories of elasticity and Lame equation. The feasibility of analytical model is verified by finite element analysis using ANSYS $CLASSIC^{TM}$, commercially available code. The variation of thermal stress at various thickness combination of inner and outer tube has also been investigated by proposed analytical model.

Keywords

References

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