1 Modeling Fatigue Life of Structural Alloys Under Block Asymmetric Loading
9
Fig. 1.1 Computed and experimental dependencies of changes in the average deformations
depending on the load number
Fig. 1.2 Computed curves of cyclic deformation
1.3.2 Multi-axial Proportional and Non-proportional
Regimes of Soft Block-Type Cyclic Loading
The second example presents the results of numerical modeling of the deformation
processes in the specimens of SS304 steel under multi-axial proportional (Fig. 1.3a)
and non-proportional (Fig. 1.3b) regimes of soft block-type cyclic loading.
For the loading history, presented in Fig. 1.3a, the stress amplitude σ 11 in blocks
at constant stress
√
3σ 12 = const was changed as follows:
• the first block includes 50 loading cycles with the amplitude of σ 11 = 248 MPa
and average stress of σ
aver
11 = 78 MPa;
• the second block consists of 50 loading cycles with the amplitude of σ 11 =
248 MPa and average stress of σ
aver
11 = 117 MPa;
9
Fig. 1.1 Computed and experimental dependencies of changes in the average deformations
depending on the load number
Fig. 1.2 Computed curves of cyclic deformation
1.3.2 Multi-axial Proportional and Non-proportional
Regimes of Soft Block-Type Cyclic Loading
The second example presents the results of numerical modeling of the deformation
processes in the specimens of SS304 steel under multi-axial proportional (Fig. 1.3a)
and non-proportional (Fig. 1.3b) regimes of soft block-type cyclic loading.
For the loading history, presented in Fig. 1.3a, the stress amplitude σ 11 in blocks
at constant stress
√
3σ 12 = const was changed as follows:
• the first block includes 50 loading cycles with the amplitude of σ 11 = 248 MPa
and average stress of σ
aver
11 = 78 MPa;
• the second block consists of 50 loading cycles with the amplitude of σ 11 =
248 MPa and average stress of σ
aver
11 = 117 MPa;