Publication detail

Theoretical Strength of Solids: Recent Results and Applications

POKLUDA, J.

Czech title

Teoretická pevnost pevných látek: nejnovější výsledky a aplikace

English title

Theoretical Strength of Solids: Recent Results and Applications

Type

journal article in Web of Science

Language

en

Original abstract

We present the results of recent achievements in the field of atomistic evaluation of the theoretical (ideal) strength of solids with emphasis on the ab initio approaches to the synthesis of the theoretical and experimental data. It is shown that the characteristics of fracture toughness (brittleness) of polycrystals are partially inherited from their (perfect) lattices. On the other hand, the response of perfect metallic crystals to triaxial tension in terms of the ultimate strain is qualitatively different from the response typical of the engineering materials. This can be attributed to the plasticity-driven growth and coalescence of microvoids at particles of the secondary phase under triaxial tension. The values of theoretical shear strength computed by using ab initio and/or MD methods are close to the experimental data.

Czech abstract

We present the results of recent achievements in the field of atomistic evaluation of the theoretical (ideal) strength of solids with emphasis on the ab initio approaches to the synthesis of the theoretical and experimental data. It is shown that the characteristics of fracture toughness (brittleness) of polycrystals are partially inherited from their (perfect) lattices. On the other hand, the response of perfect metallic crystals to triaxial tension in terms of the ultimate strain is qualitatively different from the response typical of the engineering materials. This can be attributed to the plasticity-driven growth and coalescence of microvoids at particles of the secondary phase under triaxial tension. The values of theoretical shear strength computed by using ab initio and/or MD methods are close to the experimental data.

English abstract

We present the results of recent achievements in the field of atomistic evaluation of the theoretical (ideal) strength of solids with emphasis on the ab initio approaches to the synthesis of the theoretical and experimental data. It is shown that the characteristics of fracture toughness (brittleness) of polycrystals are partially inherited from their (perfect) lattices. On the other hand, the response of perfect metallic crystals to triaxial tension in terms of the ultimate strain is qualitatively different from the response typical of the engineering materials. This can be attributed to the plasticity-driven growth and coalescence of microvoids at particles of the secondary phase under triaxial tension. The values of theoretical shear strength computed by using ab initio and/or MD methods are close to the experimental data.

Keywords in Czech

theoretical strength; deformation; dislocations; crystals; large-scale models; methods used for the evaluation of theoretical strength

Keywords in English

theoretical strength; deformation; dislocations; crystals; large-scale models; methods used for the evaluation of theoretical strength

RIV year

2012

Released

01.03.2012

ISSN

1068-820X

Volume

47

Number

5

Pages from–to

575–582

Pages count

8

BIBTEX


@article{BUT98962,
  author="Jaroslav {Pokluda},
  title="Theoretical Strength of Solids: Recent Results and Applications",
  year="2012",
  volume="47",
  number="5",
  month="March",
  pages="575--582",
  issn="1068-820X"
}