Finite strain elastoplastic bulging of circular diaphragms

The inflation of planar thin films represents a phenomenon widely employed by engineering and biological systems, with applications ranging from pressure sensors material characterization to growing skins in the human body. In this paper, bulging plane circular membranes composed isotropic elastoplastic materials is analytically, computationally experimentally studied. An analytical finite strain formulation developed implemented model deformation response inflated films. solution accurately predicts elastic plastic phases bilinear nonlinear materials, for both small large strains. It shows that sudden change full-field distribution during diaphragm associated localization first develops at membrane apex. results are compared element simulations wide range parameters, showing an excellent agreement. mathematical also validated bulge tests performed on ETFE membranes, representative response, aluminium foils show behaviour. comparison between theoretical predictions experimental measures proves validity proposed strains, which promises find modelling films, especially determination parameters through testing.