Prediction of multiaxial fatigue life for notched specimens of titanium alloy TC4

Wu, Z. R.; Hu, Xuteng; Li, Z. X.; Song, Yingdong

doi:10.1007/s12206-016-0405-1

Cited by 11 publications

(5 citation statements)

References 19 publications

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“…Moreover, for the cases with R > − 1, the Smith‐Watson‐Topper (SWT) model was employed to consider the detrimental influence of nonzero mean stresses on fatigue strength of components. Referring to the idea of LSSA, Wu et al initially analysed the fatigue strength of notch components on the basis of a newly defined critical plane‐based multiaxial fatigue model. However, they only considered stress‐strain data collected from notch tip and overlooked the impact of notch effect, thus the predicted results overall tend to be conservative.…”

Section: Critical Distance Theory and Its Applications To Fatiguementioning

confidence: 99%

“…Specifically, in their following research, 87 they pointed out that the critical distance can also be regarded as a constant in the LCF/MCF regime. 65,66,89,90 initially analysed the fatigue strength of notch components on the basis of a newly defined critical plane-based multiaxial fatigue model. However, they only considered stress-strain data collected from notch tip and overlooked the impact of notch effect, thus the predicted results overall tend to be conservative.…”

Section: Critical Distance Theory and Its Applications To Fatiguementioning

confidence: 99%

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Recent advances on notch effects in metal fatigue: A review

Liao

Zhu

Correia

et al. 2020

Fatigue Fract Eng Mat Struct

173

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Notch features including holes, fillets, shoulders, and grooves commonly exist in engineering components. When subjected to external loads, these geometrical discontinuities generally act as stress raisers and thus present significant influences on the component strength and life, which are more remarkable under complex loading paths. Accordingly, numerous theories and approaches have been developed to address notch effects in metal fatigue as well as damage modelling and life predictions, which aim to provide theoretical support for structural optimal design and integrity evaluation. However, most of them are self‐styled or focus on specific objects, which limits their engineering applicability. This review recalls recent developments and achievements in notch fatigue modelling and analysis of metals. In particular, four commonly used methods for fatigue evaluation of metallic notched components/structures are summarized and elaborated, namely, nominal stress approaches, local stress‐strain approaches, and critical distance theories and weighting control parameters‐based approaches, which intend to provide a reference for further research on notch fatigue analysis and promote the integration and/or development among different approaches for practice.

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Section: Critical Distance Theory and Its Applications To Fatiguementioning

confidence: 99%

Section: Critical Distance Theory and Its Applications To Fatiguementioning

confidence: 99%

Recent advances on notch effects in metal fatigue: A review

Liao

Zhu

Correia

et al. 2020

Fatigue Fract Eng Mat Struct

173

View full text Add to dashboard Cite

show abstract

“…The stress at a critical point is used to correlate fatigue initiation life. 23 s eq in Figure 8 is the equivalent stress. r* is the critical length.…”

Section: Crack Initiation Occurs When the Accumulative Damage Reachesmentioning

confidence: 99%

Multistage fatigue modeling of single-edge-notch tension specimens for Ni-based superalloy GH4169

et al. 2017

Advances in Mechanical Engineering

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Multistage fatigue tests were conducted on the single-edge-notch tension specimens of Ni-based superalloy GH4169. Fatigue crack growth data at different stages were recorded with the surface replica technique. Continuum damage mechanics incorporating critical distance theory was used to evaluate fatigue crack initiation life. Then, small and long fatigue crack grow rates were modeled using Shyam's model and modified Paris law, respectively. Finally, the multistage fatigue model deriving from the above theories was proposed to predict total fatigue life of GH4169. Fatigue life prediction results show that the proposed multistage fatigue model has high accuracy for GH4169.

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“…As multiaxial fatigue failures always occur at notches because of the existence of stress concentration, these three‐dimensional loading characteristics should not be overlooked in multiaxial cycle fatigue analysis for meeting practical needs . However, as most multiaxial fatigue tests and fatigue life prediction models were built on thin‐walled tube specimen in early research, there were relatively few multiaxial life prediction models built on notched component alone, although the study is of great practical significance …”

Section: Introductionmentioning

confidence: 99%

“…17,18 However, as most multiaxial fatigue tests and fatigue life prediction models were built on thin-walled tube specimen in early research, there were relatively few multiaxial life prediction models built on notched component alone, although the study is of great practical significance. [19][20][21] Remarkably, the extra additional cyclic hardening in nonproportional loading condition, caused by the rotation of stress/strain principal axis, can be easily neglected in developing prediction model. 22 This will make the fatigue life prediction results tend to be danger.…”

Section: Introductionmentioning

confidence: 99%

Prediction of multiaxial fatigue life for complex three‐dimensional stress state considering effect of additional hardening

Xie

Song

Zhao

et al. 2019

Fatigue Fract Eng Mat Struct

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In engineering practice, it is generally accepted that most of components are subjected to multiaxial stress‐strain state. To analyse this complicated loading state, different types of specimens of 2A12 (2124 in the United States) aluminium alloy were tested under multiaxial loading conditions and a new multiaxial fatigue analysis method for the state of three‐dimensional stress and strain is proposed. Elastic‐plastic finite element method (FEM) and a proposed vector computing method are used to describe the loading state at the critical point of specimen, by which the parameter ΓT is calculated at the new defined subcritical plane to consider the effect of additional cyclic hardening. Meanwhile, the principal equivalent strain is still calculated at the traditional critical plane. The new damage parameter is composed of different process parameters, by which the dynamic path of strain state, including loading environments and material properties, are fully considered in one loading cycle. According to experimental verifications with 2A12 aluminium alloy, the results show that the proposed method shows satisfactory, accurate, and reliable results for multiaxial fatigue life prediction in the state of three‐dimensional stress and strain.

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Prediction of multiaxial fatigue life for notched specimens of titanium alloy TC4

Cited by 11 publications

References 19 publications

Recent advances on notch effects in metal fatigue: A review

Recent advances on notch effects in metal fatigue: A review

Multistage fatigue modeling of single-edge-notch tension specimens for Ni-based superalloy GH4169

Prediction of multiaxial fatigue life for complex three‐dimensional stress state considering effect of additional hardening

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