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

Guiqiu Liu, Shi Liu, Feng Xin, Yi Zhao, Delong Hu, Yan Zhang and Mijia Yang

Mathematical Problems in Engineering, 2022, vol. 2022, 1-11

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.

Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jnlmpe:1092335

DOI: 10.1155/2022/1092335

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