Numerical analysis of the interaction of solute hydrogen atoms with the stress field of a crack

研究成果: ジャーナルへの寄稿記事

21 引用 (Scopus)

抄録

Finite element analysis is used to study the effect of mobile interstitial hydrogen on the deformation of metals and alloys in the case when hydrogen is in equilibrium with local stresses. The effect is studied by calculating the hydrogen atmosphere around a stationary crack tip in a linearly elastic isotropic material loaded in mode I plane strain conditions. Stresses, strains and equilibrium hydrogen concentrations are determined through an iterative finite element analysis while accounting for stress relaxation due to hydrogen induced local volume and elastic modulus changes. Numerical calculations reveal a zone immediately ahead of the crack tip in which the lattice is saturated with hydrogen. The dimensionless size of the saturation zone is found to be independent of the applied loads. The stiffness derivative method is used to calculate the hydrogen induced changes in the stress intensity factor. Calculations show that the presence of mobile interstitial hydrogen produces crack tip shielding when hydrogen induced changes in the elastic moduli are considered. The implications of the elastic analysis of the interaction between hydrogen in equilibrium with local stresses near a crack tip on the fracture resistance of materials are discussed. Then results are examined in conjunction with the elastic-plastic deformation at the tip.

元の言語英語
ページ(範囲)1709-1723
ページ数15
ジャーナルInternational Journal of Solids and Structures
33
発行部数12
DOI
出版物ステータス出版済み - 5 8 1996

Fingerprint

Hydrogen Atom
Stress Field
Hydrogen
stress distribution
numerical analysis
Numerical analysis
Numerical Analysis
hydrogen atoms
solutes
Crack
cracks
Cracks
Atoms
hydrogen
Interaction
crack tips
Crack Tip
Crack tips
interactions
Elastic Modulus

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

これを引用

Numerical analysis of the interaction of solute hydrogen atoms with the stress field of a crack. / Lufrano, J.; Sofronis, Petros Athanasios.

:: International Journal of Solids and Structures, 巻 33, 番号 12, 08.05.1996, p. 1709-1723.

研究成果: ジャーナルへの寄稿記事

@article{734186179db649258a5e59e5166f2ddb,
title = "Numerical analysis of the interaction of solute hydrogen atoms with the stress field of a crack",
abstract = "Finite element analysis is used to study the effect of mobile interstitial hydrogen on the deformation of metals and alloys in the case when hydrogen is in equilibrium with local stresses. The effect is studied by calculating the hydrogen atmosphere around a stationary crack tip in a linearly elastic isotropic material loaded in mode I plane strain conditions. Stresses, strains and equilibrium hydrogen concentrations are determined through an iterative finite element analysis while accounting for stress relaxation due to hydrogen induced local volume and elastic modulus changes. Numerical calculations reveal a zone immediately ahead of the crack tip in which the lattice is saturated with hydrogen. The dimensionless size of the saturation zone is found to be independent of the applied loads. The stiffness derivative method is used to calculate the hydrogen induced changes in the stress intensity factor. Calculations show that the presence of mobile interstitial hydrogen produces crack tip shielding when hydrogen induced changes in the elastic moduli are considered. The implications of the elastic analysis of the interaction between hydrogen in equilibrium with local stresses near a crack tip on the fracture resistance of materials are discussed. Then results are examined in conjunction with the elastic-plastic deformation at the tip.",
author = "J. Lufrano and Sofronis, {Petros Athanasios}",
year = "1996",
month = "5",
day = "8",
doi = "10.1016/0020-7683(95)00119-0",
language = "English",
volume = "33",
pages = "1709--1723",
journal = "International Journal of Solids and Structures",
issn = "0020-7683",
publisher = "Elsevier Limited",
number = "12",

}

TY - JOUR

T1 - Numerical analysis of the interaction of solute hydrogen atoms with the stress field of a crack

AU - Lufrano, J.

AU - Sofronis, Petros Athanasios

PY - 1996/5/8

Y1 - 1996/5/8

N2 - Finite element analysis is used to study the effect of mobile interstitial hydrogen on the deformation of metals and alloys in the case when hydrogen is in equilibrium with local stresses. The effect is studied by calculating the hydrogen atmosphere around a stationary crack tip in a linearly elastic isotropic material loaded in mode I plane strain conditions. Stresses, strains and equilibrium hydrogen concentrations are determined through an iterative finite element analysis while accounting for stress relaxation due to hydrogen induced local volume and elastic modulus changes. Numerical calculations reveal a zone immediately ahead of the crack tip in which the lattice is saturated with hydrogen. The dimensionless size of the saturation zone is found to be independent of the applied loads. The stiffness derivative method is used to calculate the hydrogen induced changes in the stress intensity factor. Calculations show that the presence of mobile interstitial hydrogen produces crack tip shielding when hydrogen induced changes in the elastic moduli are considered. The implications of the elastic analysis of the interaction between hydrogen in equilibrium with local stresses near a crack tip on the fracture resistance of materials are discussed. Then results are examined in conjunction with the elastic-plastic deformation at the tip.

AB - Finite element analysis is used to study the effect of mobile interstitial hydrogen on the deformation of metals and alloys in the case when hydrogen is in equilibrium with local stresses. The effect is studied by calculating the hydrogen atmosphere around a stationary crack tip in a linearly elastic isotropic material loaded in mode I plane strain conditions. Stresses, strains and equilibrium hydrogen concentrations are determined through an iterative finite element analysis while accounting for stress relaxation due to hydrogen induced local volume and elastic modulus changes. Numerical calculations reveal a zone immediately ahead of the crack tip in which the lattice is saturated with hydrogen. The dimensionless size of the saturation zone is found to be independent of the applied loads. The stiffness derivative method is used to calculate the hydrogen induced changes in the stress intensity factor. Calculations show that the presence of mobile interstitial hydrogen produces crack tip shielding when hydrogen induced changes in the elastic moduli are considered. The implications of the elastic analysis of the interaction between hydrogen in equilibrium with local stresses near a crack tip on the fracture resistance of materials are discussed. Then results are examined in conjunction with the elastic-plastic deformation at the tip.

UR - http://www.scopus.com/inward/record.url?scp=0030150644&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030150644&partnerID=8YFLogxK

U2 - 10.1016/0020-7683(95)00119-0

DO - 10.1016/0020-7683(95)00119-0

M3 - Article

AN - SCOPUS:0030150644

VL - 33

SP - 1709

EP - 1723

JO - International Journal of Solids and Structures

JF - International Journal of Solids and Structures

SN - 0020-7683

IS - 12

ER -