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Improved maximum likelihood method for P-S-N curve fitting method with small number specimens and application in T-welded joint [PDF]
Scientific Reports, 2023 In fatigue data analysis, fitting accurate P-S-N curve is problematic if only a small number of specimen is available, especially to evaluate the relationship between the stress level and the standard deviation.
Wenfei Liu +3 more
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A Small Sample Prediction Method for Engineering p-S-N Curve [PDF]
Xibei Gongye Daxue Xuebao, 2018 Based on Non-intrusive Polynomial Chaos method, a small sample prediction method for engineering p-S-N curve that has a medium fatigue life is proposed.
Xiaoran Liu, Qin Sun, Ke Liang
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Study on the P-S-N Curve of Sucker Rod Based on Three-Parameter Weibull Distribution. [PDF]
Materials (Basel), 2022 During the oil production process, sucker rods are subjected to cyclic alternating load. After a certain number of cycles, a sucker rod can experience fatigue failure. The number of cycles is called fatigue life (N), and the accurate relationship between maximum stress (S) and fatigue life (N) under a certain reliability (P), namely the P-S-N curve, is
Cai W, Li W, Xu J.
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P-S-N Curve Description of Laser Metal Deposition Ti-6.5Al-2Zr-1Mo-1V Titanium Alloy after Duplex Annealing. [PDF]
Materials (Basel), 2019 Fatigue tests were conducted on standard smooth laser metal deposition (LMD) Ti-6.5Al-2Zr-1Mo-1V titanium alloy specimens under three constant-amplitude stresses. The mixed failure behaviors and the influence of internal pores on the fatigue life were discussed in detail.
Wang T, He X, Wang X, Li Y.
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Fitting Method of Small Sample P-S-N Curve Based on Weibull Distribution [PDF]
IOP Conference Series: Materials Science and Engineering, 2021 Abstract In order to obtain the probabilistic stress-fatigue life curve of materials with small samples, a small sample P-S-N curve fitting method is proposed. This method is based on the premise that Weibull distribution can be applied to fatigue test data the method first uses the sample mean fitting to obtain the median S-N curve ...
T Huang, Z W An, Q Ma, M Q Han
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Three-Parameter P-S-N Curve Fitting Based on Improved Maximum Likelihood Estimation Method [PDF]
Processes, 2023 The P-S-N curve is a vital tool for dealing with fatigue life analysis, and its fitting under the condition of small samples is always concerned. In the view that the three parameters of the P-S-N curve equation can better describe the relationship between stress and fatigue life in the middle- and long-life range, this paper proposes an improved ...
Xiufeng Tan +3 more
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Duplex LCF-VHCF P-S-N design curves: a methodology based on the Maximum Likelihood Principle
Procedia Structural Integrity, 2022 Probabilistic-S-N (P-S-N) curves are commonly employed to model the fatigue response of specimens and components and are generally obtained by assuming the statistical distribution of the fatigue life. In industrial applications, starting from the P-S-N curves, the so-called “design curves” or “lower bound S-N curves” are defined for the design of ...
Tridello A. +4 more
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Effect of defect size on P-S-N curves in Very-High-Cycle Fatigue
Procedia Structural Integrity, 2017 Abstract It is well-known that internal defects play a key role in the Very-High-Cycle Fatigue (VHCF) response of metallic materials. VHCF failures generally nucleate from internal defects, whose size strongly affects the material strength and life. Therefore, S-N curves in the VHCF regime are defect size dependent and the scatter of fatigue data is ...
Paolino, Davide S. +3 more
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Life Prediction of Flexspline based on the Modified
Jixie chuandong, 2021 By using Hypermesh to mesh the harmonic reducer and utilizing Abaqus to complete its transient analysis. Based on the results of transient analysis，the position of the dangerous point of the flexspline is determined，a method of extracting and ...
Qingwen Huang, Baisheng Wu, Delin Liao
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Optimized processing method of P-S-N curves for high cycle fatigue of aero-engine materials
Journal of Aeronautical Materials, 2020 High cycle fatigue P-S-N curve of material are important for the design of aero-engine strength. Based on the data processing requirement of the high cycle fatigue of aero-engine materials, a novel data processing method has been developed by proposing the criterion of selecting fitting model and the method for determining the critical stress between ...
XU Wei +5 more
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