Evaluation of size effect on strain-controlled fatigue behavior of a quench and tempered rotor steel: Experimental and numerical study

Zhu, Shun‐Peng; Foletti, S.; Beretta, S.

doi:10.1016/j.msea.2018.08.073

Cited by 58 publications

(26 citation statements)

References 57 publications

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“…The fatigue damage should be considered for repeated braking. [31][32][33] In general, the temperature on the disc is mainly determined by the service speed. The temperature variation will cause the thermal cycling stress.…”

Section: The Contact Surface Between the Disc And Pads Ismentioning

confidence: 99%

Temperature evolution of the train brake disc during high-speed braking

Wang

Han

Liu

et al. 2019

Advances in Mechanical Engineering

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Temperature evolution of the train brake disc during high-speed braking was investigated using in situ experiments, theoretical analysis, and finite element modeling. The experimental results show that the temperature distribution on the friction surface experienced the formation of a hot ring first, then expansion and duration of the hot ring. Alternative hot spot and cold zone were observed on the friction surface, which is attributed to the local contact in the friction couple and heterogeneous heat dissipation condition in the disc. The corresponding maximum temperature in the disc increased rapidly first, kept stable then, and decrease slowly in the end. The one-dimensional heat conduction equation was applied to predict the maximum temperature variation and was found to be in agreement with the experimental results. Furthermore, the maximum temperature evolution and the temperature distribution of the disc at the braking time of 45 s were simulated by the finite element method, which is satisfactory. In additional, the temperature variation caused the corresponding fluctuation of instantaneous frictional coefficient and thermal stress distribution in the disc, which results in the thermal damages.

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Section: The Contact Surface Between the Disc And Pads Ismentioning

confidence: 99%

Temperature evolution of the train brake disc during high-speed braking

Wang

Han

Liu

et al. 2019

Advances in Mechanical Engineering

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“…Much research has been carried out on the effects of specimen geometry and loading condition on fatigue behavior of metallic materials [1][2][3][4][5][6][7][8]. For example, Furuya [9] investigated the effect of specimen size on the very high cycle fatigue behavior of high strength steels, and showed that large specimens endured lower fatigue strengths due to the appearance of larger inclusions in control volumes (risk volumes).…”

Section: Introductionmentioning

confidence: 99%

A Method for Predicting the Effects of Specimen Geometry and Loading Condition on Fatigue Strength

Sun

Song

2018

Metals

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Specimen geometry and loading condition usually have a great influence on the fatigue strength of metallic materials, which is an important issue in evaluating the reliability of component parts. In this paper, a rotating bending fatigue test is performed at first on an hourglass specimen and a notch specimen of a high strength titanium alloy. Experimental results indicate that, in terms of local stress, the notch specimen endures higher fatigue strength in comparison with the hourglass specimen due to its relatively smaller control volume. Then, a probabilistic control volume method is proposed for correlating the effects of specimen geometry and loading condition on the fatigue strength based on Weibull distribution and the concept of control volume. A simple formula is obtained for the fatigue strength in relation to control volumes, in which the parameter is the shape parameter of Weibull distribution of fatigue strength. The predicted results are in good agreement with the present experimental data for high strength titanium alloy and the data for the high strength steel and the full scale EA4T axle in the literature.

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“…Small specimens demonstrate higher fatigue strength compared to standard specimens while real parts exhibit even lower strength than the standard ones. While extended studies have been carried out to compare and evaluate the size effects on fatigue tests [54][55][56][57][58][59][60][61][62][63][64][65][66][67][68], recent studies show the implementation of miniature specimens to be instrumental in characterizing local properties of AM materials [41][42][43].…”

Section: Specimen Design and Preparationmentioning

confidence: 99%

High Cycle Fatigue Performance of LPBF 304L Stainless Steel at Nominal and Optimized Parameters

et al. 2020

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In additive manufacturing, the variation of the fabrication process parameters influences the mechanical properties of a material such as tensile strength, impact toughness, hardness, fatigue strength, and so forth, but fatigue testing of metals fabricated with all different sets of process parameters is a very expensive and time-consuming process. Therefore, the nominal process parameters by means of minimum energy input were first identified for a dense part and then the optimized process parameters were determined based on the tensile and impact toughness test results obtained for 304L stainless steel deposited in laser powder bed fusion (LPBF) process. Later, the high cycle fatigue performance was investigated for the material built with these two sets of parameters at horizontal, vertical, and inclined orientation. In this paper, displacement controlled fully reversed (R = −1) bending type fatigue tests at different levels of displacement amplitude were performed on Krouse type miniature specimens. The test results were compared and analyzed by applying the control signal monitoring (CSM) method. The analysis shows that specimen built-in horizontal direction for optimized parameters demonstrates the highest fatigue strength while the vertical specimen built with nominal parameters exhibits the lowest strength.

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Evaluation of size effect on strain-controlled fatigue behavior of a quench and tempered rotor steel: Experimental and numerical study

Cited by 58 publications

References 57 publications

Temperature evolution of the train brake disc during high-speed braking

Temperature evolution of the train brake disc during high-speed braking

A Method for Predicting the Effects of Specimen Geometry and Loading Condition on Fatigue Strength

High Cycle Fatigue Performance of LPBF 304L Stainless Steel at Nominal and Optimized Parameters

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