Issue
EPL
Volume 88, Number 1, October 2009
Article Number 16004
Number of page(s) 6
Section Condensed Matter: Structural, Mechanical and Thermal Properties
DOI http://dx.doi.org/10.1209/0295-5075/88/16004
Published online 23 October 2009
EPL, 88 (2009) 16004
DOI: 10.1209/0295-5075/88/16004

Modeling and simulation of mechanochemical processes in a rotational diamond anvil cell

V. I. Levitas and O. M. Zarechnyy

Iowa State University, Departments of Mechanical Engineering, Aerospace Engineering, and Material Science and Engineering - Ames, IA 50011, USA

vlevitas@iastate.edu

received 26 May 2009; accepted in final form 25 September 2009; published October 2009
published online 23 October 2009

Abstract
Strain-induced structural changes (SCs), which include chemical reactions (CRs) and phase transitions (PTs), are studied here numerically under compression and torsion of a sample in a rotational diamond anvil cell (RDAC). The results change the fundamental understanding of the interpretation of experimentally observed effects and measurements and the extraction of information on material behavior from system (sample) behavior. These effects include the nontrivial, nonlinear interaction between strongly heterogeneous stress and plastic strain tensor fields and SC kinetics, the effect of change of material strength during SC, the simultaneous occurrence of direct and reverse SCs in different regions, strong strain localization, and pressure self-multiplication.

PACS
64.60.-i - General studies of phase transitions.

© EPLA 2009