Elastic-plastic trusses with kinematic hardening as a model for polycrystalline materials under cyclic loading. Pt. 2

Besides the accumulation of residual stresses we observe for large deformation of the trusses, also cyclic hardening and softening, or even an abrupt softening (failure by crack). An opposite sign of the statical pre-stress may lead to a completely different behaviour with respect to shake-down or fatigue strength. We also obtain phenomena similar to the Poynting- and Ronay-effect well known from the torsion test. Comparing the theoretical results with experiments we recognize that trusses are highly sensitive to differences of the yield limits of the rods, with respect to extension or compression, respectively (material Bauschinger-effekt). (orig./HP)