An Approach for Stability Analysis of Gas/Fluid-Filled Cylindrical Hole in Laminated Materials

Figure 1

Schematic illustrates the range of stable hole pressure for the Mohr–Coulomb model when σ_min = σ₂ and σ_max = σ₁. The black curve and dashed line, respectively, represent the expressions on the left and right sides of equation (20). The gray region is the stable hole pressure range in which the values of the dashed line are larger than those of the solid curve. The parameter E′, which is defined by equation (21), represents the relative magnitude of the slopes of the dashed line and the asymptote of the solid curve at infinity.