l~acquisition allows laboratory study of thermo-hydro-mechanical behavior of cylindrical samples of rock and cement materials under a confining pressure of up at least 150 MPa, a deviatoric stress
, up to least 1000 MPa, and at a controlled temperature of up to at least 200 A C.
These mechanisms are additively connected and it follows that the deviatoric stress
S is additively composed by a bond-stretch (b) and conformational (c) part, which is illustrated in Fig.
ij,mm] are the maximum and the minimum values of the deviatoric stress
tensor ij components during one loading cycle.
Where: I is unit tensor; -p is static pressure; T is deviatoric stress
It is clear from this figure that the coefficient of Skempton (B) significantly affects the variation of the deviatoric stress
ij], H' and [alpha] are the penalty constant, the deviatoric stress
, the strain-hardening rate and the work-hardening constant (0 [less than or equal to] [alpha] [less than or equal to]1), respectively, while [V.
2D] = the second invariant of the deviatoric stress
Time scales involved are comparable to those in quenching, but unlike normal quenching, polymer crystallizes from the melt while under the influence of a deviatoric stress
where p is the pressure tensor, [tau] is the deviatoric stress
tensor, [rho] is the mass density, [C.
the rate of change of stress and S is the rate of change of the deviatoric stress
In CDP model dilation angle ([PSI]) is measured in the p-q plane (p: hydrostatic pressure stress, which is a function of the first stress invariant, q: second deviatoric stress
invariant) at high confining pressure and in this study it is accepted 30[degrees] as recommended in the literature.
where p is the pressure and T is the deviatoric stress