In this paper, exact closed-form solutions for displacement and stress components of thick-walled functionally graded (FG) spherical pressure vessels are presented. To this aim, linear variation of properties, as an important case of the known power-law function model is used to describe the FG material distribution in thickness direction. Unlike the pervious studies, the vessels can have arbit...

We study acoustic geometry in fluids with external pressure. In particular, we examine the conditions under which metric mimics a Schwarzschild-like metric. demonstrate that it is possible to mimic consistent way only framework of relativistic geometry.