Fatigue life evaluation of tension‐compression asymmetric material using local stress–strain method

Chen, Jiwei; Yao, Wei; Gao, Daiyang

doi:10.1111/ffe.13279

Cited by 11 publications

(7 citation statements)

References 35 publications

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“…Table 1. It should be noted that a tension-compression asymmetry is found for a large variety of polymers [37][38][39][40][41] and other materials 42,43 . Therefore, this effect is not unique to the adhesive investigated in this work.…”

Section: Tension-compression Asymmetrymentioning

confidence: 98%

Effects of non-proportionality and tension-compression asymmetry on the fatigue life prediction of equivalent stress criteria

Wentingmann

Manousides

Antoniou

et al. 2023

Preprint

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Biaxial tension/compression-torsion fatigue tests with varying levels of non-proportionality were performed employing a structural adhesive designed for wind turbine rotor blades. The cycles to failure were found to be independent of the level of non-proportionality. It is demonstrated that numerical fatigue life predictions via rainflow-counted equivalent stress histories are not able to replicate these experimental observations and overestimate the fatigue life up to a hundredfold. The tension-compression asymmetry of the adhesive resulted in significant damage prediction differences depending on the stress space representation of the Haigh diagram. If not properly taken care of, the asymmetry will also lead to non-conservative results. While demonstrated with a short fiber reinforced adhesive, the results can be transferred to other materials.

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Section: Tension-compression Asymmetrymentioning

confidence: 98%

Effects of non-proportionality and tension-compression asymmetry on the fatigue life prediction of equivalent stress criteria

Wentingmann

Manousides

Antoniou

et al. 2023

Preprint

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“…Based on the continuous damage theory and the microscopic mechanisms of fatigue damage, the stress field intensity model is proposed by Yao et al 43 to characterize the fatigue damage of notched components under complex stress conditions. The following assumption is made in this model: If the stress–strain field history of the smooth specimen is the same as that of the notched specimen, then the fatigue life of the smooth specimen and the notched specimen is the same 44,45 . The graph of the stress field intensity model is shown in Figure 4.…”

Section: Fatigue Damage Parameter Considering Stress Gradient Effectmentioning

confidence: 99%

Multiaxial fatigue life prediction method of notched specimens considering stress gradient effect

Liu

Ran

Xie

et al. 2021

Fatigue Fract Eng Mat Struct

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This paper investigates the effect of stress gradient on the fatigue life of U‐notched specimens under multiaxial proportional loading by studying the shear stress gradient and normal stress gradient on the crack initiation plane separately. First, based on the energy method and critical plane method, an energy‐critical plane method for determining the direction of crack initiation is proposed. Second, with the help of the concept of stress field intensity, the shear stress gradient and normal stress gradient on the critical plane are studied. Finally, a multiaxial fatigue life prediction model is established by combining the equivalent stress field intensity, composed of the shear stress field intensity and normal stress field intensity, with the Manson–Coffin equation. Theoretical analysis is verified by the experiments of Q345 steel notched specimens, and the results show that the predicted accuracy of the proposed method is not conservative and is superior to the local stress–strain method.

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“…However, once visible cracks appear, the rate of fatigue failure increases significantly, and then, structural failure occurs within a short period. Therefore, fatigue damage is hard to detect, which constitutes a great potential danger to aircraft, high-speed rail, ships, and so on, and many studies [1][2][3][4][5] on fatigue damage and fatigue life assessment have been carried out.…”

Section: Introductionmentioning

confidence: 99%

An energy‐based approach for uniaxial fatigue life estimation under asymmetric cyclic loading

Dong

Shen

Sun

2023

Fatigue Fract Eng Mat Struct

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Energy parameter formed by multiplying the maximum strain range and the peak stress has the problem that one value may correspond to multiple fatigue damage states. For this issue, a new energy parameter suitable for tensioncompression is proposed, which includes an improved strain-energy model and a strain-energy ratio. The improved strain-energy model deduced by judging the volume change of the micro-element has positive and negative function which can use to distinguish tensile and compressive deformation. The strainenergy ratio is established to characterize the alternate tensile and compressive deformation under asymmetric cyclic loading. Then, applying fatigue test data,

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Fatigue life evaluation of tension‐compression asymmetric material using local stress–strain method

Cited by 11 publications

References 35 publications

Effects of non-proportionality and tension-compression asymmetry on the fatigue life prediction of equivalent stress criteria

Effects of non-proportionality and tension-compression asymmetry on the fatigue life prediction of equivalent stress criteria

Multiaxial fatigue life prediction method of notched specimens considering stress gradient effect

An energy‐based approach for uniaxial fatigue life estimation under asymmetric cyclic loading

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