Figure 5 shows the distribution of radial stress [[sigma].sup.*.sub.r],

tangential stress [[sigma].sup.*.sub.[theta]], and radial displacement [u.sup.*] along the inner and outer edges of the frozen wall.

where D is the damage variable, which represents the average damage value between the two cracks and varies between 0 and 1, [t.sub.n], [t.sub.s], and [t.sub.t] are the normal stress component and two

tangential stress components, respectively, [T.sub.n] is the normal stress component of the unit, and [T.sub.s] and [T.sub.t] are the first and second

tangential stress components of the unit, respectively.

Caption: Figure 7:

Tangential stress [[sigma].sub.[theta]] as a function of radial coordinate r: (a) for n=0.5, (b): n=-0.5.

Specially, stress transfer is changed by the

tangential stress jump at the interface of the interlayer, demonstrating the surface effects.

According to the mechanism of rock burst, rocks' maximum

tangential stress [[sigma].sub.[theta]], rocks' uniaxial compressive strength [[sigma].sub.c], rocks' uniaxial tensile strength [[sigma].sub.t] and elastic energy index [W.sub.et] are defined as the criterion indices for rock burst prediction in the proposed PNN-model.

with [[PSI].sub.n-1] : [OMEGA] [??] R Prandtl stress function associated with the torsion

tangential stress field involving Lame tensor field [[LAMBDA].sub.n-1] : [OMEGA] [right arrow] L(V; V).

Using these estimated parameters, the new temperature field and radial and

tangential stress fields may be reconstructed using (2.10), (2.17), and (2.18) respectively.

Assume that the

tangential stress (ryz), which arises in longitudinal section beams, distributed uniformly over its width (by).

When the

tangential stress ([[sigma].sub.[theta]]) in the tensile state is selected as the judgment standard of the pressure arch and the lateral pressure coefficient is [xi] = 0.2, the pressure arch curve appears as shown in Figure 6.

In this paper we study the Couette flows of a second grade fluid, between two parallel plates, produced by the motion of a plate that applies a

tangential stress on the fluid.

Than according to corrected area it is possible to recalculate normal and

tangential stress. Corrected shearing area recalculation time step depends on the horizontal displacement values' recording interval.

Experimental researches [9] showed that in compressed CFST elements directions of geometrical axes of symmetry coincide with basic stress areas normal lines, therefore there are no

tangential stress and shear strain in matrixes of flexibility of concrete and steel.