A unified fatigue life calculation based on intrinsic thermal dissipation and microplasticity evolution

Teng, Zhenjie; Wu, Haoran; Boller, Christian; Starke, Peter

doi:10.1016/j.ijfatigue.2019.105370

Cited by 34 publications

(26 citation statements)

References 40 publications

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“…For R = 21, the value of the mechanical energy W is approximately similar to the dissipated energy Q: this means that the mechanical energy is totally transformed into heat (Q'90-100%W). This experimental finding is in accordance with the hypothesis and results of Meneghetti and Ricotta 38 and Teng et al 19 for tests on steels carried out at R = 21. In particular, this last work 19 mentions that the proportion of 80%-100% of the plastic work dissipates into the surrounding as inelastic heat.…”

Section: Q and W Parameterssupporting

confidence: 93%

“…This experimental finding is in accordance with the hypothesis and results of Meneghetti and Ricotta 38 and Teng et al 19 for tests on steels carried out at R = 21. In particular, this last work 19 mentions that the proportion of 80%-100% of the plastic work dissipates into the surrounding as inelastic heat. They assumed the ratio Q/W as an independent material constant, also based on the work by Table 1.…”

Section: Q and W Parameterssupporting

confidence: 93%

“…With this aim, some researchers proposed studies that combine different measurement techniques to compare the evolution of different parameters during cyclic loading. Among them, Teng et al 19 proposed recently an interesting analytical formulation relating thermal dissipation to microplasticity evolution for SAE1045 fatigue life calculation of S-N curves. That work underlined that they are both fatigue damage indicators.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Rapid estimation of fatigue limit for C45 steel by thermography and digital image correlation

Colombo

Sansone

Patriarca

et al. 2020

The Journal of Strain Analysis for Engineering Design

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Combining thermography and Digital Image Correlation (DIC) measurements, this paper aims to experimentally capture the fatigue damage phenomenon in steels, with a methodology allowing to rapidly estimate the fatigue limit. Surface temperatures and displacement fields are collected during fatigue tests performed with blocks of progressively increased stress amplitude, at different stress ratios. Results show that both thermography and DIC-based parameters have bilinear trends as a function of the stress amplitude. These changes in the thermal and mechanical behaviours, highly sensitive to the selected stress ratio, are related to damage initiation due to microplasticity and give a precise and rapid estimation of the fatigue limit.

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Section: Q and W Parameterssupporting

confidence: 93%

Section: Q and W Parameterssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Rapid estimation of fatigue limit for C45 steel by thermography and digital image correlation

Colombo

Sansone

Patriarca

et al. 2020

The Journal of Strain Analysis for Engineering Design

View full text Add to dashboard Cite

show abstract

“…In addition to the above methods, which are mostly based on experimental studies, the lifespan and residual resource of operating tools can also be determined by the calculation method. For example, in [24] a method to calculate the value of the intensity of adhesivefatigue wear of cutting tools using the coefficient of thermal diffusion evaluation was proposed; in [25] a method for calculating the fatigue wear by calculating the internal heat dissipation and the development of microplasticity is presented, the calculation results have a good correlation with experimental data obtained by the same author; in [25] a method for quantitative calculation of the residual resource by the size of microcracks on a SEM images is presented.…”

Section: Methodsmentioning

confidence: 99%

High temperature wear assessment of mining machines operating tools

Gromyka

Kremcheev

2020

E3S Web Conf.

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Mining is widely associated with the use of a variety of mining machines for various duties, such as extraction, loading and transportation of rock. Due to prolonged use of machines, the amount of wear of operating tools and machine parts increases. This problem is especially acute for mining and loading machines used in excavation and reclamation, because the wear rate is increased on those duties. The development of wear process and evaluation of the residual life of operating tools of mining and loading machines is well studied in world practice. However, given the variety of climatic, geological and mining conditions, unique for each mineral deposit, we are facing difficulties in creating a comprehensive model of wear process development. In modern researches on this area such issues as estimation of operating tools residual life during intense wear under extreme conditions of high temperatures and sharp temperature drop are understudied. These conditions are typical for deposits of such minerals as coal and peat, which are especially prone to spontaneous combustion. This review discusses methods for assessing various wear mechanisms and the effect of temperature on the intensity of those processes, as well as methods to determine the residual life of operating tools of mining and loading machines working in high-temperature environment.

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“…The thermometric method is based on the absorbed hysteresis energy during fatigue cycling, where most of the energy (80-100%) is dissipated into the surroundings as heat, whereas a small portion increases the internal energy [73,74]. It is commonly agreed that a typical temperature-cycles curve will exhibit three stages, namely, increase, stabilization and failure [75,76].…”

Section: Thermometricmentioning

confidence: 99%

A review of fatigue damage detection and measurement techniques

Bjørheim

Siriwardane

Pavlou

2022

International Journal of Fatigue

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A vast amount of research has been carried out towards the goal of quantifying changes related to the fatigue damaging process in materials throughout the fatigue life. However, no recommended practice has been developed for the experimental measurement of fatigue damage before a macroscopic crack has been initiated. Therefore, this paper reviews the existing fatigue damage detection and measurement techniques on the basis of both momentum within the research field and their being considered non-destructive. The techniques are separated into two categories, namely, fatigue crack monitoring and fatigue damage monitoring. The parameters of these techniques, which quantify the physical and mechanical changes of the materials during the fatigue life, were critically reviewed in regard to the mechanism behind the change, limitations, shortcomings, etc. The acoustic emission, hardness, ultrasonic, magnetic and potential drop methods are applicable for in-situ measurements while positron annihilation and X-ray diffraction are more suitable for laboratory assessments. Even though all the revived methods are applicable for metals, acoustic emissions, X-ray diffraction, ultrasonic, strainbased and thermometric methods are also suitable for composites. The reliability, advantages, weaknesses, case/ material dependency and applicability of each method are compared and tabulated for making a framework for choosing suitable technique for fatigue crack or damage detection of material or components.

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A unified fatigue life calculation based on intrinsic thermal dissipation and microplasticity evolution

Cited by 34 publications

References 40 publications

Rapid estimation of fatigue limit for C45 steel by thermography and digital image correlation

Rapid estimation of fatigue limit for C45 steel by thermography and digital image correlation

High temperature wear assessment of mining machines operating tools

A review of fatigue damage detection and measurement techniques

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