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	Dynamic tensile experiments of hard rubber on instron test machine under finite deformations Šulc, Petr ; Pešek, Luděk ; Bula, Vítězslav ; Šnábl, Pavel This paper deals with the first experimental tests of hard rubbers under tensile harmonic loading on the axial-torsional servohydraulic Instron 8852 test machine. The objective of these experiments on cylindrical rubber specimens on this machine is to obtain stress-strain curves of rubber specimens, first considering uniaxial finite longitudinal strains for a single load cycle. Next, the hysteresis loops and their skeleton curves are compared for two selected strain measures as a function of their conjugate stress. It is shown how to obtain the dependence between elongation in the axial direction and constriction in the radial direction, which is used to determine the Cauchy stress in this configuration. Detailed record
	Geometrie konečných deformací, linearizace a inkrementální deformace při počátečním stavu napětí/přetvoření Fiala, Zdeněk As usual in continuum mechanics, deformation and stress tensors at a point are considered to form vector (i.e. Euclidean) spaces. However, we can also regard the space of deformation tensors (i.e. positive definite matrices) as a Riemannian manifold of constant negative curvature and prove that the stress tensors then form covectors. From this standpoint we can simply geometrically interpret logarithmic strain and consecutively generalize it for states with initial deformation, naturally and unambiguously introduce objective time derivative (in particular the stress rate) and thus linearize in a geometrically consistent way, and exactly formulate incremental approach. Detailed record
	Application of the logarithmic description in simulation of the localisation Poživilová, Alena ; Sluys, L. J. Application of the softening material behaviour in quasi-static calculation with finite elasto-viscoplastic deformation theory is presented. Detailed record

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