MODELING OF HYSTERETIC EFFECTS IN INDENTATION TEST OF ELASTOMERIC MATERIAL

The aim of this work is to identify the parameters of model of elastomeric material which satisfactorily describes hysteretic looses in loading-unloading cycle of micro-indentation. The problem is solved by direct 3D computer simulation method. Reasonable choice of material model, friction law and their parameters defines the quality of computer simulation. To provide the results, the full scale experiments are compared with the computer simulation tests to verify the material model. Two kinds of experimental tests are made. The first test is compression of the thick ring of elastomeric material by flat punch with constant velocity of strain. The programs of the tests are loading-unloading cycle and loading-relaxation of the stress. The second test, was used, is indentation of elastomeric material by spherical indenter using the same rate of strain velocity loading and unloading cycle. The parameters of Prony series are obtained according to verification experiment result.