| Autor: |
Voronin, S. V., Danilushkin, V. S., Tregub, V. I., Konovalov, S. V. |
| Zdroj: |
Journal of Surface Investigation: X-Ray, Synchrotron & Neutron Techniques; Nov2021, Vol. 15 Issue 6, p1212-1216, 5p |
| Abstrakt: |
The paper presents the results of computer simulation of the process of the initiation and development of cracks by the finite-element method in models of a single-phase brittle alloy, which contain ordered micropores with cubic and triclinic syngony of pore arrangement. As a result of computer modeling of the uniaxial stretching process, data on the nature of the distribution of stresses and deformations, and the trajectory of crack propagation are obtained. The results obtained for the triclinic and cubic syngony of the pore arrangement are compared with the results of stretching the model of an isotropic sample. It is established that the crack-propagation trajectory in the model with cubic pore arrangement and in the isotropic model is linear, and the crack-propagation pattern in the model with triclinic pore arrangement is more branched. For crack growth in the model with cubic syngony of pore arrangement, the greatest relative deformation is required, compared to the model with triclinic syngony of pore arrangement and the isotropic model. The lengths of cracks formed in an equal number of steps of the solution of finite-element analysis are determined. The crack-propagation velocity in the isotropic model is higher than in the models with cubic and triclinic syngonies of pore arrangement. It is shown that the pores act as crack stoppers, because at a certain stage of destruction, an increase in the level of deformation is required for the crack to grow in a brittle body with cubic and triclinic syngony. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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