Unified two-stage fatigue methodology based on a probabilistic damage model applied to structural details

Correia, José A.F.O.; Huffman, Peter; Jesus, Abílio M.P. De; Cicero, Sergio; Fernández‐Canteli, Alfonso; Berto, Filippo; Glinka, G.

doi:10.1016/j.tafmec.2017.09.004

Cited by 45 publications

(22 citation statements)

References 23 publications

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“…-with a complicated geometry of the tool; -considering friction in contact. It should be emphasized that the represented solution does not fully exploit the biharmonic equation (19), (20): it is satisfied at an earlier stage.…”

Section: Discussion Of Results Of Studying the Stressed-state Using Tmentioning

confidence: 99%

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Studying the stressed state of elastic medium using the argument functions of a complex variable

Chigirinsky¹,

Naumenko²

2019

EEJET

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На базi методу аргумент функцiй та методу функцiй комплексного змiнного отриманi узагальнюючi рiшення плоскої задачi теорiї пружностi з використанням iнварiантних диференцiальних спiввiдношень, здатних замкнути результат для поставленої системи рiвнянь. Наведено пiдходи, за допомогою яких визначають не самi дозволяючи функцiї, а умови їх iснування. Це дозволяє розширити коло гармонiйних функцiй рiзної складностi, що задовольняють всiляким крайовим умовам прикладних задач, що постiйно оновлюються. До розгляду взято двi базовi функцiї: тригонометрична та фундаментальна, аргументи яких є невiдомими координатними залежностями. Введення до розгляду аргумент функцiй змiнює пiдходи визначення дозволяючих залежностей, тому що задача iстотно спрощується при виявленнi диференцiального зв'язку помiж ними у виглядi спiввiдношень Кошi-Рiмана та Лапласа. Показано кiлька аналiтичних рiшень рiзної складностi, яким вiдповiдають рiзнi граничнi умови. Зiставлення з результатами дослiджень iнших авторiв, при однакових вихiдних даних, призводить до однакового результату, а при розглядi тестової задачi взаємодiї металу з пружнiм напiвпростором-до збiгу визначальних схем силового впливу на пружне середовище. Таким чином, запропоновано новий пiдхiд рiшення плоскої задачi теорiї пружностi, пов'язаний з використанням аргумент функцiй, що дозволяє замкнути задачу через диференцiальнi спiввiдношення Кошi-Рiмана та Лапласа. Цi узагальнення розширюють коло гармонiйних функцiй, що вiдповiдають рiзним граничним умовам прикладних задач Ключовi слова: теорiя пружностi, аргумент функцiї, спiввiдношення Кошi-Рiмана, рiвняння Лапласа, граничнi умови

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Section: Discussion Of Results Of Studying the Stressed-state Using Tmentioning

confidence: 99%

“…Varying stresses and deformations during loading are the main reasons for a decrease in the strength and durability of articles [20]. That renders relevance to solving applied problems that characterize the stressed state of articles by applying classical equations from the theory of continuum mechanics.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Studying the stressed state of elastic medium using the argument functions of a complex variable

Chigirinsky¹,

Naumenko²

2019

EEJET

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“…The prediction accuracy of the methods to assess mean stress effect on crack initiation behavior of various materials under different loading conditions has been investigated by Zhu et al [12,13], Correia et al [14], Dowling et al [15,16], and Burger and Lee [17]. Zhu et al [12,13] have proposed the mean stress effect correction in fatigue life predictions based on energy parameters.…”

Section: Introductionmentioning

confidence: 99%

A Modified Walker Model Dealing with Mean Stress Effect in Fatigue Life Prediction for Aeroengine Disks

Mao

et al. 2018

Mathematical Problems in Engineering

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Mean stress effect plays an important role in fatigue life prediction, and it is discovered that maximum stress has nonnegligible influence on mean stress effect. Therefore, a modified Walker model is proposed to account for mean stress effect on fatigue life of aeroengine disks, which contains the influence of stress ratio and maximum stress on mean stress effect. Eight sets of fatigue data for standard smooth bars from six kinds of materials commonly used in aeroengine disks as well as two sets of experimental data from simulated specimens of turbine disks were employed to investigate the prediction capability of the proposed model against other candidate mean stress relationships. It is found that Goodman model generates most conservative results, while Morrow model overestimates fatigue life for most cases. SWT model yields similar results to Walker model but with less accuracy. The results of the modified Walker model turn out to be superior to those of any other candidate models for all cases examined, especially for large mean stress ones. Thus, the modified Walker model can be an effective method to predict fatigue lives of aeroengine disks influenced by mean stresses.

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“…In this type of structures, the most critical elements from the point of view of fatigue strength are the connections between the members; the irregularity of the connections geometry is one of the factors that affect the fatigue life of these structural elements. The fatigue life assessment of structural details is widely studied in the recent years [1,2]. Another important factor of great influence on the fatigue strength of bridge structure is the material degradation [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Fatigue strength of corroded bolted connection

Zampieri

Curtarello

Pellegrino

et al. 2017

Frattura Ed Integrità Strutturale

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This note summarizes some recent investigation results on the behavior of corroded steel bolted joints under uniaxial fatigue loading. Fatigue test specimens, were made up using S355 structural steel plates joined together with preloaded M12 bolts of class 10.9 with a geometry that corresponds to the Δσ = 112 MPa EC3 detail category. The accelerated corrosion process was accomplished using an electrolyte consisting of an aqueous 5% NaCl solution whereby the specimens were treated. In particular, during the corrosion process specimens were repeatedly immersed for 2 minutes in the electrolyte and then removed keeping them 60 minutes long in free air at 35 °C. An atmospheric corrosion in marine-industrial environment is wellrepresented through corrosion test. Fatigue loading tests and surface morphology measurement of uncorroded and corroded specimens were performed and the results were compared.

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Unified two-stage fatigue methodology based on a probabilistic damage model applied to structural details

Cited by 45 publications

References 23 publications

Studying the stressed state of elastic medium using the argument functions of a complex variable

Studying the stressed state of elastic medium using the argument functions of a complex variable

A Modified Walker Model Dealing with Mean Stress Effect in Fatigue Life Prediction for Aeroengine Disks

Fatigue strength of corroded bolted connection

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