Abstract
In this paper (III), structural members or elements are classified into NM Model, in which axial and flexural stresses and strains are predomonant, and NQ Model, in which axial and shearing stresses and strains are predomonant. Both the models are idealized as "Resonance Determinate System", in which the equilibrium condition of "Resonance Capacity" and the compatibility condition of deflection amplitude hold true, so that the resonance fatigue characteristics of them are able to be described analytically by using those of composing materials of the models which were given analytically and experimentally in the previous papers (I), (II). On NM and NQ Models idealized as "Resonance Determinate System", the resonance response condition of composing materials that Resonance Capacity is constant during repeated loadings is proved to be a necessary condition of that of the models.
