For a long time, the study of the mechanical properties of concrete has been based on macromechanics
The particle flow code (PFC) is an effective method to study the macromechanics
problems of an analytic object (including construction and rock mass) at the microlevel [22-26], which has been widely applied in simulation tests of uniaxial compression, biaxial compression, and triaxial compression for the rock specimen [19, 27-30].
So the reasonable determination of the relationship between the pore size of the coal body and the dynamic movement of overlying rock strata is helpful to build up the transition between the microscopic quantity and macromechanics
In this paper, "macromechanics
, mesomechanics, micromechanics, and nanomechanics of materials are the component parts of structural mechanics of materials [1-3]."
Segal, "Equal channel angular extrusion: from macromechanics
to structure formation," Materials Science and Engineering A, vol.
Coclear micromechanics and macromechanics
. In: Dallos P, Popper AN, Fay RR, eds.
This engineering textbook explains the mechanical behavior of a single lamina, develops equations for the mechanical properties of a lamina, extends the macromechanics
of a single lamina to a laminate, and walks through methods for analyzing the failure and design of laminated composites.
As shown by the above authors, it is possible to use macromechanics
transformation formulae together with specially orthotropic moduli calculated from micromechanics, and obtain the composite modulus, [E.sub.c].
at work during the damage process can be determined by measuring the internal pore structure changes under different deterioration conditions.
However, as the GFRP bolt is mainly used in underground tunnel and construction support, the mechanical research on GFRP bolt support is mainly concentrated in the field of macromechanics
of bolt distribution and installation by the early literatures, and the researches on the microscopic damage of GFRP bolt are not enough.
Mesomechanics and macromechanics
of rotational modes formation in pressure worked polymer materials were also beyond the scope of Beloshenko et al.'s (2013) review study .
Analysis of a composite structure as in state of heterogeneity by providing the material properties of constituent materials is mathematically complex, and therefore theories such as micromechanics and macromechanics
are developed for the theoretical analysis.