Plasticity and phase transition of crystals under continuous deformations by phase field crystal approach
| Autor: | Anmin He, Pei Wang, Kun Wang, Fengguo Zhang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Work (thermodynamics) Phase transition Materials science Phase field crystal Mechanical Engineering 02 engineering and technology Mechanics Plasticity Deformation (meteorology) 021001 nanoscience & nanotechnology 01 natural sciences Stress (mechanics) Mechanics of Materials 0103 physical sciences General Materials Science 0210 nano-technology Simulation methods |
| Zdroj: | International Journal of Plasticity. 122:225-243 |
| ISSN: | 0749-6419 |
| DOI: | 10.1016/j.ijplas.2019.07.004 |
| Popis: | Despites of some efforts in deformation simulations by the Phase field crystal (PFC) method, simulations of phase transitions and plasticity of crystals under continuous deformations are still lack and some related fundamental issues remain open as well, for example the definition of stresses and the non-zero stresses of unstrained system. In the present work, we propose a deformation simulation method which conforms to the well-established framework of the PFC model. In contrast to traditional deformation simulation methods, our method could naturally mimic melting/freezing, solid-solid phase transition and plasticity of materials under continuous deformations without any additional parameters. Within the frameworks of our method, the stress is well-defined and isothermal-isobaric simulation method is developed. The isothermal-isobaric simulation method enables us to overcome the drawback of previous PFC simulations, for example the nonzero stress of unstrained system. Numerical examples given in present work confirm our conclusions. Particularly, the physical natures of the plasticity are uncovered at the temporal and spatial scale accessible to the PFC method. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect