Compression of pressurised elastic pockets

Abstract

A circular silicone sheet is clamped at its edge and pressurised by the injection of a liquid beneath creating a pocket. We study experimentally the deformation and pressure increase caused by the compression of a pressurised pocket. Excellent agreement is found between experimental observations and numerical predictions based on an axisymmetric thin hyperelastic material; an approximate analytical model explains the link between changes in shape and the applied force.

Modelling the compression of a soft ellipsoid fingertip

“…Hence, a number of problems have been studied based on the large deformation theory with different geometries, e.g., circular or square elastic membrane inflation was reformulated by simplified governing equations 24,25 . By using the modified governing system of equations, the problem can be solved by a standard analytical method with appropriate boundary conditions, which was extended by Bouremel et al for the free inflation and compression problem 26 .…”

“…24,25 By using the modified governing system of equations, the problem can be solved by a standard analytical method with appropriate boundary conditions, which was extended by Bouremel et al for the free inflation and compression problem. 26…”

“…24,25 By using the modified governing system of equations, the problem can be solved by a standard analytical method with appropriate boundary conditions, which was extended by Bouremel et al for the free inflation and compression problem. 26 The problem of inflation and compression with different geometries rather than flat membrane inflation have been investigated in detail. For instance, Feng et al studied the inflation of an axisymmetric semi-spherical elastic membrane that compressed with a flat rigid plate with a rigid support underneath.…”

Modelling the inflation of an elastic membrane with a load

“…Recent models include the inflation of different preshaped membranes such as sphere and torus, contact of the membrane with various contact shapes and different stiffness of the shapes [20]- [25]. For instance, Yang et al analytically investigated the behaviour of inflated circular membranes with large deformation in contact with various interfaces of the concave, convex, upper hemisphere and lower hemispheres.…”

“…Bourmel et al studied the membrane inflated and compressed with compressible fluid experimentally and numerically. The relationship between the change in shape and the applied force is explained by their analytical model [20]. However, the membrane inflation with a constant load have not been explored with finite deformation theory.…”