Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지

The Evaluation of Residual Stresses in the Welded Joint of Steel Materials by the Optimum Selection of the Advanced Indentation Technique

연속압입시험의 최적조건 선정을 통한 철강재료의 용접부 잔류응력 평가

  • 유승종 (일진경금속(주) 소재기술연구소) ;
  • 김주현 (국민대학교 기계자동차공학부)
  • Published : 2007.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

Most of materials receive forces in use so that the characteristics of materials must be considered in system design to prevent deformation or destruction. Mechanical properties of materials can be expressed as responsible level of material itself under the exterior operation. Main mechanical properties are strength, hardness, ductility and stiffness. Currently, among major measure facilities to measure the mechanical properties, advanced indentation technique has important use in industrial areas due to nondestructive and easy applications for mechanical tensile properties and evaluation of residual stress of materials. This study is to find the optimum experimental condition about residual stress advanced indentation technique for accurate analysis of the welded joint of steel materials through indentation load-depth curve obtained from cruciform specimen experiment. Optimum selection was applied to the welded joint of real steel materials to find out non-equi-biaxial stress state and the results were compared with general residual stress analyzing method fur verification.

Keywords

References

  1. Ahn, J. H., Choi, Y. and Kwon, D., 'Evaluation of Plastic Flow Properties of Materials through the Analysis of Indentation Load-Depth Curve,' J. Kor. Inst. Met. & Mater., Vol. 38, No. 12, pp.1606-1611, 2000
  2. Lee, Y. H., 'Evaluation of the Residual Stress in MicroMaterials though the MicroMechanical Contact Analysis of the Continuous Indentation Technique,' A doctor's thesis, 2002
  3. Lee, Y. H., Jeong, J. H., Park, J. S. and Kwon, D., 'Analysis of Non-equi-biaxial Surface Residual Stress through the Modeling of Shape Shifting in Instrumented Indentation Curve,' J. Kor. Inst. Met & Mater., Vol. 41, No. 11, pp.737-742, 2003
  4. Lee, Y. H., Ji, W., Son, D., Jang, J. and Kwon, D., 'Analysis of Bending Residual Stress in SS400 Steel Beam Using Continuous Indentation Technique and Stress Interaction Model,' J. Kor. Inst. Met. & Mater., Vol. 40, No. 10, pp.1042-1047, 2002
  5. Korean Standard KS B 0951, Appendix A, 2005
  6. Jeon, E. C., Park, J. S. and Kwon, D., 'The Optimization of Experimental Condition of Continuous Indentation Test for Tensile Properties Evaluation,' J. Kor. Inst. Met. & Mater., Vol. 41, No. 2, pp.83-89, 2003
  7. Noyan, I. C. and Cohen, J. B., 'Residual Stresses,' Springer-Verlag, 1987
  8. Lu, J., 'Handbook of Measurement of Residual Stresses,' Fairmont press, Lilburn, GA, 1996
  9. Rund, C. O, Dimascio, P. S. and Yavelak, J. J., 'Comparison of three residual-stress measurement methods on a mild steel bar,' J. of the Experimental Mechanics, Vol. 25, No. 4, pp.338-343, 1985 https://doi.org/10.1007/BF02321331
  10. Park, S. H., 'Design of Experiments,' Min Young Publishing, pp.9-612, 2001
  11. Lee, S. B., 'The application of Taguchi method by using MINITAB,' Iretech, pp.1-208, 2001
  12. Chapra, C. S., 'Numerical Methods for Engineers,' Mc Graw Hill, Third Edition, pp.58-81, 1998
  13. Korean Standard KS B 0950, 2002
  14. Jung, W. S., 'Continuous indentation technique in variant contact area Load-depth curve for residual stress free state,' A master's thesis, 2005