Fig. 11. Pressure p_i (a) and aspect ratio (b) of an initially circular inclusion within linear elastic perfectly-plastic material (Poisson's ratio = 0.3) for different yield stress ₀ subjected to anisotropic remote stress |₁₁| |₂₂| (with (₁₁ + ₂₂)/2 = 100 kPa) with fluid compressibility = 10^–5 kPa^–1 and matrix bulk modulus K = 10³ kPa.