On the overall response of elastomeric solids with pressurized cavities

M. I. IDIART; O. LOPEZ-PAMIES

Chicago

Conferencia; 48th Annual Technical Conference of Society of Engineering Sciences; 2011

Society of Engineering Sciences

We present a means of accounting for the presence of pressurized cavities on the overall response of elastomeric solids undergoing large deformations. The main idea is to express the overall response of an elastomer with pressurized cavities in terms of its overall response when cavities are vacuous. This is achieved via a change of variables valid whenever the common assumption of incompressibility is used for the elastomeric matrix. The result permits then to incorporate straightforwardly the effect of internal pressure on any of the micromechanical models already available for elastomeric solids with vacuous cavities. Ensuing models account for constitutive and geometric nonlinearities as well as for deformation-dependent internal pressure concomitant with large deformations. Sample results for porous rubbers under plane-strain conditions will be shown and discussed.