Abstract:
The relationships between the module of stress and strain tensor deviator, in the
case of thermorheological processes, are modeled by using the structural model. It is shown
that sub-element properties can be determined from some experiences on thin walls tubes
loaded with axial forces and interior pressure. Because the constants and material functions
for this material are unknown the loaded conditions with constant state parameters are
required. If the stretching process is produced with a constant speed of axial strain for each
material there is one constant report among axial and circumstantial stresses which ensures
in isothermal processes state constant parameters.