An Analytical Approach to the Analysis of Inhomogeneous Pipes under External Pressure

Figure 8

Contour plot of the yield function values, 𝑓, for the homogeneous and the inhomogeneous cases at the complete yielding of the first section along the circumference (𝑡=26mm, 𝐷=457.2mm, 𝜔=1/1000, 𝑛=3, and 𝜃_𝑐=𝜋/4).