Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Coupled Analysis of Hydrogen Transport Within ABAQUS

ABAQUS 를 이용한 수소확산 해석

  • 오창식 (고려대학교 대학원 기계공학과) ;
  • 김윤재 (고려대학교 기계공학과)
  • Published : 2009.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, the coupled model with hydrogen transport and elasto-plasticity behavior is introduced. This model is implemented to the general-purpose FE code, ABAQUS, via the user-defined subroutine UMAT and UMATHT. In UMAT, the spatial gradients of hydrostatic stress and hydrogen induced deformation are calculated, and then are passed into UMATHT. Heat transfer equation within UMATHT is substituted by hydrogen transport equation including the effects of stress states and strain hardening. To validate this model, the finite element analyses coupled with hydrogen transport and mechanical loading are performed for the boundary layer specimens with low and high strength steel properties. The FE results are compared with the previous studies by Taha and Sofronis (2001).

Keywords

References

  1. Birnbaum, H. K. and Sofronis, P., 1994, 'Hydrogen-Enhanced Localized Plasticity-A Mechanism for Hydrogen Related Fracture,' Materials Science and Engineering A, Vol. 176, pp. 191-202 https://doi.org/10.1016/0921-5093(94)90975-X
  2. Sofronis, P. and McMeeking, R. M., 1989, 'Numerical Analysis of Hydrogen Transport Near a Blunting Crack Tip,' Journal of the Mechanics and Physics of Solids, Vol. 37, No. 3, pp. 317-350 https://doi.org/10.1016/0022-5096(89)90002-1
  3. Lufrano, J. and Sofronis, P., 1998, 'Enhanced Hydrogen Concentrations Ahead of Rounded Notches and Cracks-Competition Between Plastic Strain and Hydrostatic Stress,' Acta Materialia, Vol. 46, No. 5, pp. 1519-1526 https://doi.org/10.1016/S1359-6454(97)00364-9
  4. Taha, A. and Sofronis, P., 2001, 'A Micromechanics Approach to the Study of Hydrogen Transport and Embrittlement,' Engineering Fracture Mechanics, Vol. 68, pp. 803-837 https://doi.org/10.1016/S0013-7944(00)00126-0
  5. Krom, A. H. M., Koers, R. W. J. and Bakker, A., 1999, 'Hydrogen Transport near a Blunting Crack Tip,' Journal of the Mechanics and Physics of Solids, Vol. 47, pp. 971-992 https://doi.org/10.1016/S0022-5096(98)00064-7
  6. A. H. M. Krom, H. J. Maier, R. W. J. Koers, and A. Bakker, 1999, 'The Effect of Strain Rate on Hydrogen Distribution in Round Tensile Specimens,' Material Science and Engineering A, Vol. 271, pp. 22-30 https://doi.org/10.1016/S0921-5093(99)00276-2
  7. Y. Kim, Y. J. Chao, M. J. Morgan, and P. S. Lam, 'Comparison of Decoupled and Coupled Analyses for Hydrogen Transport in Fracture Specimens,' 2007 ASME conference on Pressure Vessels and Piping, July 22-26, 2007, San Antonio, Texas
  8. ABAQUS Version 6.7, 2007, 'User's Manual,' Hibbitt, Karlsson and Sorensen, Inc, RI
  9. R. A. Oriani, 1970 'The Diffusion and Trapping of Hydrogen in Steel,' Acta Metallurgica et Materialia, Vol. 18, pp. 147-157 https://doi.org/10.1016/0001-6160(70)90078-7

Cited by

  1. Analytical Methodology Obtaining an Optimal Welding Sequence for Least Distortion of Welded Structure vol.31, pp.3, 2013, https://doi.org/10.5781/KWJS.2013.31.3.54
  2. Assessment of Effective Factor of Hydrogen Diffusion Equation Using FE Analysis vol.34, pp.6, 2010, https://doi.org/10.3795/KSME-A.2010.34.6.709