دورية أكاديمية
Pressure Induced Dynamical Instabilities In Body Center Cubic Crystals
| العنوان: | Pressure Induced Dynamical Instabilities In Body Center Cubic Crystals |
|---|---|
| المؤلفون: | Guerrero, Oscar |
| المصدر: | Open Access Theses & Dissertations |
| بيانات النشر: | ScholarWorks@UTEP |
| سنة النشر: | 2010 |
| المجموعة: | University of Texas at El Paso: Digital Commons@UTEP |
| مصطلحات موضوعية: | MOLECULAR DYNAMICS, PLASTICITY, STRESS STRAIN RELATION, TANTALUM, WAVE PROPAGATION CRYSTALS, YIELD STRESS, Atomic, Molecular and Optical Physics, Condensed Matter Physics |
| الوصف: | Large-scale atomistic simulations of shock-wave propagation in single crystals exhibit large anisotropies in the elastic-plastic and solid-liquid transitions. Characteristic of this type of simulations are the large strains at which the crystal yields plastically, regardless of crystal orientation. At these large strains, uniaxial deformations, such as those produced in planar shock loading generate dynamical instabilities. We have investigated the directional anisotropy of the elastic limit in bcc crystals, in particular Tantalum (Ta), employing molecular dynamics (MD) simulations. We show that the elastic - plastic transition in BCC defect-free crystals is caused by the appearance of soft-phonon modes and not via homogenous nucleation of extended defects. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://scholarworks.utep.edu/open_etd/2696Test; https://scholarworks.utep.edu/cgi/viewcontent.cgi?article=3695&context=open_etdTest |
| الإتاحة: | https://scholarworks.utep.edu/open_etd/2696Test https://scholarworks.utep.edu/cgi/viewcontent.cgi?article=3695&context=open_etdTest |
| رقم الانضمام: | edsbas.79CB023A |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |