TITLE:
Evolution of Stress-Strain State in the Structural Heterogeneities Geomaterials under Uniaxial and Biaxial Loading
AUTHORS:
V. N. Oparin, O. M. Usoltseva, P. A. Tsoi, V. N. Semenov
KEYWORDS:
Laboratory Experiment, Digital Speckle Correlation Method, Rock Mass, Hierarchical Block Structure, Microstrains, Deformation-Wave Processes
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.2 No.12,
November
25,
2014
ABSTRACT: The aim of this study was to analyze
distribution and development of stress-stress state in structured rock
specimens subject to uniaxial and biaxial loading to failure using digital
speckle correlation method. Within the experimental analysis of wave processes
in the block-hierarchy structure of geomedia (uniaxial and biaxial compression
and shearing of prismatic geomaterial specimens), the authors revealed the fact
of initiation of low-frequency micro-deformation processes under slow
(quasi-static) disturbances. The estimation of the deformation-wave behavior of
geomaterials as the “summed” contributions made by elements of the scanned
surfaces with different-oriented (in-phase and anti-phase) oscillations has
been performed using the energy approach that is based on the scanning function
R, analogous to the “center of mass” in the classical mechanics.