Some 3D failure theories are applied to obtain the optimum values for the winding angle, burst pressure, maximum axial force and the maximum angular speed of the pressure vessel.
(3) With the increase of axial pressure ratio, the corresponding maximum load also increases.
With the increase of axial pressure ratio, the corresponding maximum load also increases.
It is obvious that with the increase of axial pressure ratio, the corresponding maximum load also increases.
The results from these numerical simulations are then used to derive an expression that could be used to estimate an appropriate earth pressure coefficient that predicts the maximum axial soil resistance in these conditions.
Correspondingly, when decreasing the axial pressure, the pore pressure also needs to be decreased.
Firstly, when increasing the pore pressure, then the axial pressure also needs to be increased.
Triaxial unloading confining pressure process was reducing confining pressure while increasing axial pressure.
where f p is the frequency of the RBM with exposed to axial pressure, and f 0 is the frequency of RBM not exposed to axial pressure.
Based on this, modelling equations are proposed to predict maximum axial load, axial strain and lateral strain, as well as the entire behaviour until failure with curves of axial load axial strain and axial load lateral strain.
The confining pressure and the axial pressure were maintained at 5 MPa, the upstream pressure was maintained at 2.1 MPa, and the initial downstream pressure was 1.0 MPa.
