• DOI:10.1007/BF00723622
• Corpus ID: 136541552

Effect of damage in the material on the stress-strain state in the vicinity of the crack tip in creep

@article{Astafev1992EffectOD,
  title={Effect of damage in the material on the stress-strain state in the vicinity of the crack tip in creep},
  author={V. I. Astaf'ev and T. V. Grigorova and Vladimir A. Pastukhov},
  journal={Soviet materials science : a transl. of Fiziko-khimicheskaya mekhanika materialov / Academy of Sciences of the Ukrainian SSR},
  year={1992},
  volume={28},
  pages={1-6}
}

• V. I. Astaf'ev, T. Grigorova, V. Pastukhov
• Published 1992
• Materials Science
• Soviet materials science : a transl. of Fiziko-khimicheskaya mekhanika materialov / Academy of Sciences of the Ukrainian SSR

ConclusionsThe solution of the simulation problem of the growth an antiplanar shear crack in the coupled formulation for the case of creep with damage shows the following.1.The singular stress field (equivalent stresses τa/ψ are limited and stresses τa and continuityψ linearly decrease to zero at the crack tip), typical of crack theory, does not form at the crack tip. This corresponds to the results of finite-element solutions for separation cracks [12, 18].2.The crack surfaces (ϕ = ±π which are not loaded border in the vicinity of the crack tip with a region of the completely failed material (π/2 <ϕ < π) in which τa=0 andψ=0.3.The crack growth rate in the coupled formulation of the problem is an internal parameter of the problem and is being solved. The resultant law of crack growth qualitatively reflects the special features of this process in corrosion-resisting steels at a constant load.4.As a result of the combined formulation of the problem the singularity of the crack tip disappears and this results in relatively lower values of the crack growth rate.