The yield-point phenomenon and cyclic plasticity of the uniaxially loaded specimens

The Yield-Point Phenomenon and Cyclic Plasticity of the Console Beam

“…The results obtained from numerical simulations were compared against experimental data. In terms of the stress-strain curves of uniaxial tensile-compression loads [26], the difference between the two models (model with the YPP and model without the YPP) only exists in the first cycle, where transition from the elastic into the elasto-plastic region occurs at different yield stress. The model with the YPP is consistent with the experimental results, whereas the model without the YPP in the first cycle at transition into plastic strain does not follow the experimental results.…”

“…1). Console beams were made from low-alloy EN 42 CrMo 4 steel, which exhibits cyclic hardening in its normalized state and cyclic softening in its tempered state [26]. To analyse the impact of the YPP in combination with cyclic hardening or softening, console beams were prepare in two different states, normalized (184 HV) and hardened (296 HV).…”

“…Uniaxial experimental observations [26] show that material hardening or softening continues for the specimen's whole remaining life time. The rate of hardening also depends on the magnitude of the plastic strain.…”

“…The effect of Lüders bands on the bending of steel tubes was discussed by Aguirre et al [23], Hallai and Kyriakides [24] and Bechle and Kyriakides [6]. Recently, Zou et al [25] observed cyclic loading in yield plateau and Žerovnik et al [26] presented the influence of the YPP on cyclic plasticity of the uniaxially loaded specimens.…”

“…Another interesting model that related cyclic hardening to the plastic strain history was proposed by Korelc et al [45]. However, only few research studies [26], [46] to [48] are focused on the effect of the YPP in combination with cyclic plasticity. Even the materials which express the YPP was addressed by constitutive models of cyclic plasticity, the YPP is not taken into account in most of those models.…”