Results 241 to 250 of about 4,044,006 (282)

A study on modified P‐S‐N curve of notched specimens based on small sample under multiaxial loading

Fatigue & Fracture of Engineering Materials & Structures, 2022
AbstractThe small sample data under the highest stress level are augmented based on the improved Bootstrap method, and then the augmented data are converted to sample data under the lower stress levels with the Principle of Fatigue Life Probability Percentiles Consistency.
Xuemei Pan, Jianhui Liu, Youtang Li, Feilong Hua, Xiaochuang Chen   +4 more
openaire   +1 more source

A Method for Estimating Parameters of P-S-N Curves Based on Weibull Distribution

Volume 7: 5th International Conference on Micro- and Nanosystems; 8th International Conference on Design and Design Education; 21st Reliability, Stress Analysis, and Failure Prevention Conference, 2011
An S-N curve is a traditional tool for design against fatigue. Because there is often a considerable amount of scatter in fatigue performance of specimens, The P-S-N curves capturing the probability of failure should be employed instead of S-N curves. In order to minimize the time and the number of specimens required for fatigue test, many researches ...
Dan Ling, Shun-Peng Zhu, Hong-Zhong Huang, Li-Ping He, Zhong-Lai Wang   +4 more
openaire   +1 more source

Analyses of P-S-N Curve and Fracture Morphology of Die-Casting Magnesium Alloy AZ91D Containing Mischmetal

Applied Mechanics and Materials, 2013
The p-S-N curve (p = 50%) of die casting magnesium alloy AZ91D with 1% mischmetal was determined and the fatigue strength corresponding to 3.8 × 105 cycles with 50% probability was 70 MPa. The fatigue fracture surfaces were observed using scanning electron microscopy. The fatigue factures varied with the applied stress and their own defects.
Yu Lei Xu, Kui Zhang, Li Han, Ming Feng Li   +3 more
openaire   +1 more source

Sulla stima delle curve P-S-N mediante inferenza bayesiana

2008
Si riportano i risultati di uno studio pseudo-sperimentale condotto con il metodo Montecarlo al fine di quantificare gli effetti prodotti dall’inclusione dell’informazione a priori in un procedimento inferenziale bayesiano per la definizione delle curve P-S-N e della design curve di un dato acciaio. Le ipotesi di partenza della procedura di analisi dei
DE IORIO, ANTONIO, GUIDA, MAURIZIO, PENTA, FRANCESCO, PINTO, PAOLO   +3 more
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New data analysis of probabilistic stress-life (P–S–N) curve and its application for structural materials

International Journal of Fatigue, 2010
Abstract Conventional S – N fatigue curves, the so-called Wohler curves are generally considered as the experimental fatigue life plots for several stress amplitudes. The curves are usually expressed as median ranks and each life distribution is supposed to follow the log-normal distributions.
Shigeo Shimizu, Katsuji Tosha, Kazuo Tsuchiya   +2 more
openaire   +1 more source

High-Cycle Fatigue P-S-N Curve Estimating Method Based on Maximum Likelihood Method for Turbine Coupling Bolt Materials

Applied Mechanics and Materials, 2014
The tensile fatigue tests and S-N curve fitting results of the coupling bolt material 25CrMo were given in this paper. It has been proved that the high-cycle fatigue properties of the bolt material can be accurately described by the three-parameter exponential S-N curve model by comparing the fitting results based on different S-N curve models.
Yu Jiong Gu, Tie Zheng Jin, Hai Dong Zu, Jing Xu, Dong Chao Chen   +4 more
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Evaluation of Fatigue Life of Welded Joint of Gear Box-Shank in Vibro Ripper Using P-S-N Curve

Transactions of the Korean Society of Mechanical Engineers A, 2015
A vibro ripper utilizes high-frequency vibration for rock fragmentation. This concept is different from those used by other existing breakers. The gearbox-shank welded joint of a vibro ripper is a very important part. Because it delivers the vibromotive force to the tooth, it is important to predict its soundness.
Kwang Keun Oh, JaeHoon Kim, Jung Yeol Park, GyuSang Yang, JongWon Park, Sung Hyun Kim   +5 more
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Anisomorphic constant fatigue life diagrams of constant probability of failure and prediction of P–S–N curves for unidirectional carbon/epoxy laminates

International Journal of Fatigue, 2016
Abstract The effect of stress ratio on statistical distribution of fatigue life of a unidirectional carbon/epoxy composite has been examined. Furthermore, a method for efficiently predicting a family of S–N curves with probability of failure as the parameter for any stress ratio of constant amplitude loading has been developed.
M. Kawai, K. Yano
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Research on the P‐S‐N Curve Fitting Method of Notched Specimens Considering Small Sample Properties

Fatigue & Fracture of Engineering Materials & Structures
ABSTRACTAiming at the issue of fatigue test data for large‐scale mechanical components of building steel are very limited, a method for fitting P‐S‐N curves under small sample data of notched specimens is proposed to predict fatigue life. First, a fatigue life subsample augmented and its reliability assessment method are established, based on Bayesian ...
Ziyang Zhang, Jianhui Liu, Juntai Hu, Qingjun Wu, Shenglei Wu   +4 more
openaire   +1 more source

Research on the Fitting Method for P‐S‐N Curves With Extremely Small Sample Experiment Data: Improved Backwards Statistical Inference Method

Fatigue & Fracture of Engineering Materials & Structures
ABSTRACTThis study focuses on an improved statistical processing method for extremely small sample probabilistic S‐N (P‐S‐N) curve test data and proposes an improved backwards statistical inference method. By employing a quantile consistency principle, an equivalent large sample of fatigue lives can be obtained by congregating all test data, which ...
Tong Mu, Bingfeng Zhao, Liyang Xie, Dongwu Gao, Xin Wang, Jiaxin Song   +5 more
openaire   +1 more source