Temat: strain gradient plasticity - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of pre-tension on torsion of microscale Cu wires: a study via strain gradient theory
Autorzy:: Ma, Xinbing
Liu, Jinxing
Powiązania:: https://bibliotekanauki.pl/articles/280360.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: nonproportional loading
strain gradient plasticity
size effect
cyclic response
Opis:: Nonproportional plastic deformations on the microscale are an emerging topic. A simplified theory of strain gradient elasto-plasticity is developed to study the evolution of yield strength in a copper wire sequentially experiencing tension and torsion. The pre-tension deformation and stress are inherited to the upcoming torsion process, resulting in a nonproportional loading condition. With consideration of the extra hardening effect due to strain gradient, pre-tension weakens the extra hardening effect of the strain gradient and the dependence on the wire radius. Cyclic torsion behavior is also investigated. Anomalous Bauschinger effect and plastic softening are found.
Źródło:: Journal of Theoretical and Applied Mechanics; 2019, 57, 4; 1055-1065
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: A two-dimensional finite element model of the grain boundary based on thermo-mechanical strain gradient plasticity
Autorzy:: Song, Y.
Voyiadjis, G. Z.
Powiązania:: https://bibliotekanauki.pl/articles/279340.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: strain gradient plasticity
grain boundary
energetic
dissipative
2D FEM
Opis:: In this work, a two-dimensional finite element model for the grain boundary flow rule is developed based on the thermo-mechanical gradient-enhanced plasticity theory. The proposed model is temperature-dependent. A special attention is given to physical and micromechanical nature of dislocation interactions in combination with thermal activation on stored and dissipated energy. Thermodynamic conjugate microforces are decomposed into energetic and dissipative components. Correspondingly, two different grain boundary material length scales are present in the proposed model. Finally, numerical examples are solved in order to explore characteristics of the proposed grain boundary flow rule.
Źródło:: Journal of Theoretical and Applied Mechanics; 2018, 56, 2; 377-391
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

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