Journal
ENGINEERING FRACTURE MECHANICS
Volume 123, Issue -, Pages 197-210Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2014.03.001
Keywords
Creep damage; Crack growth; Cavity growth; Multiaxial fracture; Finite element analysis
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Funding
- National Natural Science Foundation of China [11172102, 50835003]
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This article presents a concise multiaxial creep-damage model for creep crack growth considering the cavity growth and microcrack interaction. Special emphasis is put on developing and validating the multiaxial creep ductility factor (MCDF) based on power-law creep controlled cavity growth theory. Good agreements with the theoretical and experimental data prove the effectiveness of the proposed MCDF. The application of the proposed creep-damage model through finite element simulation of the creep deformation and crack growth in C-Shaped Tension and Compact Tension specimens of 316H tested at 550 degrees C confirms the predictive capability of the proposed model. (C) 2014 Elsevier Ltd. All rights reserved.
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