A multiaxial creep-damage model for creep crack growth considering cavity growth and microcrack interaction

作者：Wen, Jian-Feng; Tu, Shan-Tung^*

来源：Engineering Fracture Mechanics, 2014, 123: 197-210.

DOI：10.1016/j.engfracmech.2014.03.001

• Creep damage
• Crack growth
• Cavity growth
• Multiaxial fracture
• Finite element analysis

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.

• 出版日期2014-6
• 单位华东理工大学