Ratcheting strain and its effect on low cycle fatigue behavior of Al 7075-T6 alloy

Sreenivasan, S.; Mishra, Swagatika; Dutta, Krishna

doi:10.1016/j.msea.2017.05.048

Cited by 41 publications

(17 citation statements)

References 26 publications

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“…1 From Figure 2A to F, it can be seen that with the increase of mean stress and stress amplitude, ratcheting strain increases, which is consistent with other studies. [1][2][3][4]6,13 This is also noticed from the faster shift of hysteresis loops with the increase of σ a or σ m , as already shown in Figure 1.…”

Section: Effects Of Mean Stress and Stress Amplitudesupporting

confidence: 75%

“…With the increase of cyclic number, significant fatigue and ratcheting damage occurs, and the tertiary stage is dominated by cyclic softening and the specimen will failure quickly . From Figure A to F, it can be seen that with the increase of mean stress and stress amplitude, ratcheting strain increases, which is consistent with other studies . This is also noticed from the faster shift of hysteresis loops with the increase of σ a or σ m , as already shown in Figure .…”

Section: Ratcheting Evolution Characterizationmentioning

confidence: 99%

“…Ratcheting behavior of material depends on many factors including mean stress, stress amplitude, stress ratio, stress rate, peak stress, and loading history. Numerous studies were mainly focused on the effects of mean stress and stress amplitude on fatigue and ratcheting behaviors . For instance, Paul et al found that ratcheting strain of SA333 steel increased with mean stress and stress amplitude.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous studies were mainly focused on the effects of mean stress and stress amplitude on fatigue and ratcheting behaviors. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] For instance, Paul et al 1 found that ratcheting strain of SA333 steel increased with mean stress and stress amplitude. With the increase of stress amplitude, the responded plastic strain amplitude increased and fatigue life decreased.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Uniaxial ratcheting behavior and fatigue life models of commercial pure titanium

Chang

Wen

Zhou

et al. 2018

Fatigue Fract Eng Mat Struct

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The uniaxial fatigue and ratcheting behavior of commercial pure titanium (CP‐Ti) was investigated by asymmetric cyclic stress‐controlled experiments at room temperature. The effects of mean stress, stress amplitude, stress ratio, and peak stress on ratcheting behavior and fatigue life were discussed. It was found that increasing mean stress, stress amplitude, and peak stress or decreasing stress ratio reduced fatigue life and promoted ratcheting behavior. The applicability of different fatigue life models was analyzed, and a new stress ratio‐related failure model was proposed based on the exponential increase of fatigue life with stress ratio. Among all the models investigated in this study, the exponential stress ratio‐related model has more advantage in fatigue life predictions for CP‐Ti under ratcheting‐fatigue interaction.

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Section: Effects Of Mean Stress and Stress Amplitudesupporting

confidence: 75%

Section: Ratcheting Evolution Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Uniaxial ratcheting behavior and fatigue life models of commercial pure titanium

Chang

Wen

Zhou

et al. 2018

Fatigue Fract Eng Mat Struct

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show abstract

“…Sreenivaasan et al. 17 studied the influence of ratcheting strain on the low-cycle fatigue (LCF) response of Al 7075-T6 alloy. Accumulation of ratcheting strain due to imposed mean stress showed detrimental effect on the fatigue life of symmetric strain-controlled tests.…”

Section: Introductionmentioning

confidence: 99%

Effect of ratcheting fatigue damage on the evolution of tensile properties of Al–Mg alloy

Kumar

Das

Singh

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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This work aims to investigate the effect of damage accumulation on the evolution of tensile properties due to prior ratcheting fatigue in as-received and artificially aged conditions of Al–Mg alloy (AA 5754). Uniaxial asymmetric stress controlled tests for various combinations of mean stress and stress amplitude are performed at room temperature. Progressive degradation in the mechanical properties of structures and machines subjected to cyclic loading during service period can affect the structural integrity. In view of this, ratcheting fatigue tests are interrupted at various life fractions for particular mean stress and stress amplitude followed by tensile tests to understand the damage evolution during ratcheting for both conditions of alloy. Also, the effect of mean stress and stress amplitude on the post ratcheting tensile behaviour is analysed by conducting the ratcheting tests up to 150 cycles. Cyclic hardening is exhibited in the initial cycles followed by saturation for both as-received and artificially aged alloy. Ratcheting strain increases with the increase in both mean stress and stress amplitude. Drastic changes in tensile properties are noticed with ratcheting fatigue damage evolution for both conditions of alloy. The evolution of tensile properties due to prior loading history such as ratcheting fatigue can provide fundamental understanding in the design of structural components.

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An improved kinematic hardening rule describing the effect of loading history on plastic modulus and ratcheting strain

2023

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Ratcheting strain and its effect on low cycle fatigue behavior of Al 7075-T6 alloy

Cited by 41 publications

References 26 publications

Uniaxial ratcheting behavior and fatigue life models of commercial pure titanium

Uniaxial ratcheting behavior and fatigue life models of commercial pure titanium

Effect of ratcheting fatigue damage on the evolution of tensile properties of Al–Mg alloy

An improved kinematic hardening rule describing the effect of loading history on plastic modulus and ratcheting strain

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