Multiaxial fatigue life assessment of sintered porous iron under proportional and non-proportional loadings

Ma, Songyun; Markert, Bernd; Yuan, Huang

doi:10.1016/j.ijfatigue.2017.01.005

Cited by 54 publications

(18 citation statements)

References 28 publications

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“…However, under pure torsion and torsion-dominated multiaxial loadings, the SWT model has demonstrated less accurate fatigue life predictions [ 23 ]. Liu’s model has two forms considering two crack failure modes—tensile cracking failure mode, and shear crack failure mode that is generally determined by fatigue tests [ 24 , 32 ]. Chu’s model averages the contribution from tensile behavior and shear behavior and provides an average crack direction of 22.5° as the critical plane [ 24 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Multiaxial Fatigue Damage Parameter and Life Prediction without Any Additional Material Constants

Zhu

Liu

et al. 2017

Materials

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Based on the critical plane approach, a simple and efficient multiaxial fatigue damage parameter with no additional material constants is proposed for life prediction under uniaxial/multiaxial proportional and/or non-proportional loadings for titanium alloy TC4 and nickel-based superalloy GH4169. Moreover, two modified Ince-Glinka fatigue damage parameters are put forward and evaluated under different load paths. Results show that the generalized strain amplitude model provides less accurate life predictions in the high cycle life regime and is better for life prediction in the low cycle life regime; however, the generalized strain energy model is relatively better for high cycle life prediction and is conservative for low cycle life prediction under multiaxial loadings. In addition, the Fatemi–Socie model is introduced for model comparison and its additional material parameter k is found to not be a constant and its usage is discussed. Finally, model comparison and prediction error analysis are used to illustrate the superiority of the proposed damage parameter in multiaxial fatigue life prediction of the two aviation alloys under various loadings.

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Section: Introductionmentioning

confidence: 99%

Multiaxial Fatigue Damage Parameter and Life Prediction without Any Additional Material Constants

Zhu

Liu

et al. 2017

Materials

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“…For example, in shear failure mode, the shear components predominate in the initiation and growth of shear crack; thus, it could be used to orientate the critical plane. However, this method may be not always useful for some materials under NP loading, such as S460N steel shown in Figure B and sintered porous iron reported in Ma et al The introduction of weight coefficients into damage parameter can be employed as the second method, which has been proven to be effective by the prediction results of VF model. The weight coefficients should usually be calculated by fitting uniaxial fatigue data, such as the one incorporated in JS parameter.…”

Section: Resultsmentioning

confidence: 99%

Use of an energy‐based/critical plane model to assess fatigue life under low‐cycle multiaxial cycles

Gan

Zhong

2019

Fatigue Fract Eng Mat Struct

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For engineering components subjected to multiaxial loading, fatigue life prediction is crucial for guaranteeing their structural security and economic feasibility. In this respect, energy‐based models, integrating the stress and strain components, are widely used because of their availability in fatigue prediction. Through employing the plastic strain energy concept and critical plane approach, a new energy‐based model is proposed in this paper to evaluate the low‐cycle fatigue life, in which the critical plane is defined as the maximum damage plane. In the proposed model, a newly defined NP factor κ* is used to quantify the nonproportional (NP) effect so that the damage parameter can be conveniently calculated. Moreover, a simple estimation method of weight coefficient is developed, which can reflect different contributions of shear and normal plastic strain energy on total fatigue damage. Experimental data of 10 kinds of materials are employed to assess the effectiveness of this model as well as three other energy‐based models.

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“…material properties and loading conditions (Gosar and Nagode, 2015;Socie and Marquis, 2000), which is unknown in the absence of experiments due to variations of material and loading factors. The experiments of components in real working conditions are indispensable to obtain the failure mode of components (Ma et al, 2017), but it is costly. The crack failure modes exhibited by different materials under the same loading conditions are different.…”

Section: Proposed Judgment Criteria On Cracking Failure Modementioning

confidence: 99%

Strain energy-based multiaxial fatigue life prediction under normal/shear stress interaction

Zhu

Liu

et al. 2018

International Journal of Damage Mechanics

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Through characterizing the interaction of normal/shear stress–strain behavior on material planes of TC4 alloys, a new strain energy critical plane model describing mean stress effects is proposed for life prediction under tension–compression, pure torsion, and tension–torsion loadings. Moreover, a modified Ince–Glinka model is elaborated through considering crack surface close to the maximum shear strain plane. Three simple solutions are presented to determine cracking failure mode using the concepts of life, damage, and strain. Comparing with lifing models of Liu, Smith–Watson–Topper, and modified Ince–Glinka, the proposed model provides more accurate life predictions for TC4 and a compressor turbine disc by full-scale fatigue testing.

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Multiaxial fatigue life assessment of sintered porous iron under proportional and non-proportional loadings

Cited by 54 publications

References 28 publications

Multiaxial Fatigue Damage Parameter and Life Prediction without Any Additional Material Constants

Multiaxial Fatigue Damage Parameter and Life Prediction without Any Additional Material Constants

Use of an energy‐based/critical plane model to assess fatigue life under low‐cycle multiaxial cycles

Strain energy-based multiaxial fatigue life prediction under normal/shear stress interaction

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