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Three-Dimensional Numerical Simulation of Creep Crack Growth Behavior for 316H Steel Using a Stress-Dependent Model

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Listed:
  • Guiqiu Liu
  • Shi Liu
  • Feng Xin
  • Yi Zhao
  • Delong Hu
  • Yan Zhang
  • Mijia Yang

Abstract

Based on detailed three-dimensional numerical simulation, creep crack growth behavior of C(T) specimen with different thicknesses of 316H steel was predicted using a stress-dependent creep ductility and strain rate model. Three regions were observed in the relation of creep crack growth rate versus fracture parameter C∗. The C(T) specimen with higher thickness exhibits higher CCG rate. The turning point 1 location from low C∗ region to transition C∗ region increases with increasing thickness, while that of turning point 2 seems to be independent of specimen thickness. Based on the finite element results, constraint-dependent turning point 1 location and creep crack growth rate equations were fitted. More accurate and realistic life assessment may be made when the stress-dependent model and the constraint effect were considered for creep life assessments of high-temperature components subjecting to a low applied load.

Suggested Citation

  • Guiqiu Liu & Shi Liu & Feng Xin & Yi Zhao & Delong Hu & Yan Zhang & Mijia Yang, 2022. "Three-Dimensional Numerical Simulation of Creep Crack Growth Behavior for 316H Steel Using a Stress-Dependent Model," Mathematical Problems in Engineering, Hindawi, vol. 2022, pages 1-11, September.
    • Handle: RePEc:hin:jnlmpe:1092335
    DOI: 10.1155/2022/1092335
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