This work numerically and experimentally studies the deformation of flexible tubes under positive transmural pressure. The numerical analysis uses asymmetric static simulations with a neo-Hookean model, defined by the shear modulus, validated through experiments with two different materials. A dimensionless study was conducted to evaluate the variation in tube volume as a function of transmural load (the ratio of transmural pressure per shear modulus), considering different lengths and thicknesses. For thin-walled conducts, a reduction of one order of magnitude in thickness requires a smaller transmural load of the same order to achieve the same deformation. Additionally, length does not affect deformation for relatively thin-walled conducts. So, for flexible conducts long enough and thin enough, the volumetric deformation as a function of the ratio of the transmural load to dimensionless thickness collapses into a single curve, simplifying the prediction of deformation. This curve allows the shear modulus to be estimated with a single experiment using a manometer, facilitating the characterization of these materials.
