+Advanced Search
The effect of pre-strain on the failure assessment of titanium pressure vessel with crack
Author:
Affiliation:

1.School of Mechanical Engineering,Jiangsu University of Technology;2.School of Mechanical and Power Engineering,Nanjing Tech University

Clc Number:

Fund Project:

National Natural Science Foundation of China(51805230), Major Project of Natural Science Research in Universities of Jiangsu(16KJA460002), Jiangsu Key La-boratory of Green Process Equipment(GPE201801)

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    To understand the effect of pre-strain on the integrity assessment of titanium structure with crack, the dependence of tensile mechanical parameters, fracture toughness, failure assessment diagram (FAD) on pre-strain were focused. Firstly, tensile tests revealed that, the yield stress and the yield-ultimate strength ratio increased, but the ductility decreased with pre-strain value, while the fracture toughness was decreasing with pre-strain. Then, based on finite element (FE) analyses of compact tension (CT) specimen and titanium pressure vessel with crack, the plastic zone near the crack tip was decreasing with pre-strain, resulting in the decreasing of J-integral. Moreover, the failure assessment curves (FAC) of Options 1 and 3 in BS 7910: 2013 were varying with pre-strain, and the acceptable area was decreasing. Therefore, the reserve factor on yield stress increased with pre-strain, but that on fracture toughness decreased significantly. In brief, the pre-strain significantly affects the failure assessment of titanium pressure vessel with crack, and needs to be considered in the integrity assessment.

    Reference
    Related
    Cited by
Get Citation

[Dai Qiao, Wang Fei, Zhang Jian, Chen Xiaoyang, Zhou Jinyu, Zhou Changyu. The effect of pre-strain on the failure assessment of titanium pressure vessel with crack[J]. Rare Metal Materials and Engineering,2020,49(10):3301~3308.]
DOI:10.12442/j. issn.1002-185X.20190673

Copy
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:August 17,2019
  • Revised:December 04,2019
  • Adopted:December 04,2019
  • Online: November 04,2020
  • Published: