Estimation of C* and stress field for P91 steel with threshold stress

被引：0
|
作者：
Lai H.-S. [1 ,3 ]
Xu P. [2 ]
Liu K.-L. [1 ]
Gong L.-Z. [1 ]
机构：
[1] College of Chemical Engineering, Fuzhou University, Fuzhou
[2] College of Civil Engineering, Fuzhou University, Fuzhou
[3] Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University, Zhuhai
来源：
Chuan Bo Li Xue/Journal of Ship Mechanics | 2020年 / 24卷 / 11期
关键词：
C*; Finite element analysis; GE/EPRI method; HRR stress field; Threshold stress;
D O I：
10.3969/j.issn.1007-7294.2020.11.010
中图分类号：
学科分类号：
摘要：
As the second phase particle reinforced steel whose power law creep constitutive relation contains threshold stress, P91 steel is widely applied to high temperature structural components in the ship and deepsea engineering. In order to better predict the creep crack growth of P91 steel, the GE/EPRI method was revised in this paper to estimate C* value of P91 steel with threshold stress, and an estimation method for calculating HRR stress field was obtained. Then their accuracy was verified by finite element method. The re- search results show that the modified GE/EPRI method can accurately estimate C* value of P91 steel with critical stress, and the non-dimensional parameter h1 of the modified GE/EPRI method is affected by threshold stress. The method for calculating HRR stress field has a high accuracy, laying a theoretical basis for the safety assessment and lifetime prediction of steel components in high temperature structures. © 2020, Editorial Board of Journal of Ship Mechanics. All right reserved.
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页码：1462 / 1469
页数：7
相关论文
共 13 条
  • [1] Kumar V, German M D, Shih C F., An engineering approach for elastic-plastic fracture analysis, EPRI Final Report, (1981)
  • [2] Biglaria F, Nikbin K M, Goodall I W, Webster G A., Determination of fracture mechanics parameters J and C* by finite element and reference stress methods for a semi-elliptical flaw in a plate, International Journal of Pressure Vessels and Piping, 80, pp. 565-571, (2003)
  • [3] Xuan F Z, Tu S T, Wang Z D., C* estimation for cracks in mismatched welds and finite element validation, International Journal of Fracture, 126, pp. 267-280, (2004)
  • [4] Gowhari-Anaraki A R, Djavanroodi F, Shadlou S., Estimation of C*-integral for radial cracks in annular discs under constant angular velocity and internal pressure, American Journal of Applied Science, 5, 8, pp. 997-1004, (2008)
  • [5] Gowhari-Anaraki A R, Djavanroodi F, Shadlou S., Estimation of C*-integral in thin T-sections subjected to projection and remote loading base on elastic stress concentration factor, American Journal of Applied Science, 5, 5, pp. 586-596, (2008)
  • [6] Tu S T., Creep behavior of crack near bi-material interface characterized by integral parameters, Theoretical and Applied Fracture Mechanics, 38, pp. 203-209, (2002)
  • [7] Lai H S, Yoon K B., Estimation of C (t) and the creep crack tip stress field of functionally graded materials and verification via finite element analysis, Composite Structure, 153, pp. 728-737, (2016)
  • [8] Chen Jialun, Yu Xiuqing, Description of T91/P91 used in high-temperature ferrite tube material for boiler, Boiler Manufacturing, 159, 1, pp. 15-22, (1996)
  • [9] Chen Y X, Yan W, Wang W, Shan Y Y, Yang K., Constitutive equations of the minimum creep rate for 9% Cr heat resistant steels, Material Science & Engineering A (Structural Materials: Properties, Microstructure and Processing), 534, pp. 649-653, (2012)
  • [10] Cai Bin, Li Weijie, Zhou Weiwei, Et al., High temperature creep behavior of Al-0.2Sc-0.04Zr alloys, Special Casting & Nonferrous Alloys, 34, 2, pp. 113-115, (2014)
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