finite elastic deformations, Hencky tensor, indentation, uniform compression, constitutive relations, finite element method

Indentation tests are widely developed last decade due to relative simplicity of experimental setup. At the same time one has an opportunity to perform tests with small specimens. The behavior of elastomer during an interaction with rigid spherical stamp is examined within current investigation. The model of Hencky media and the generalization of this model to describe physically nonlinear response are used as constitutive relations. The series of tests with prismatic specimens made of natural rubber with low impurity content was performed on kinematical loading experimental setup to identify proposed model. The material constants which were determined from compression test are substituted into numerical model with finite element spatial discretization. The obtained solutions were compared with experimental compression and indentation curves. The comparison reveals the applicability of proposed model.

Astapov Yuri Vladimirovich E-mail: ast3x3@gmail.com, Postgraduate student, Tula State Univercity, Tula, Russia.