Fatigue Crack Initiation—Propagation Reliability Model

Martin, W. Scott; Wirsching, Paul H.

doi:10.1061/(asce)0899-1561(1991)3:1(1)

Cited by 11 publications

(2 citation statements)

References 8 publications

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“…Studies that are centered on LDDP reveal a long and evolving history. Nelson, 6 Dowling, 7 and Martin and Wirsching 8 provided a general framework and proposed that the fatigue life can be described as a sequence of the crack initiation process and crack growth process 5 . Peng and Feng 9 applied this framework to the degradation mechanisms of ultrathin oxides and derived the corresponding statistical inferences.…”

Section: Introductionmentioning

confidence: 99%

Statistical analysis and optimal inspection planning for lifetime delayed gamma degradation processes

Yang

et al. 2021

Quality & Reliability Eng

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Degradation measurements of highly reliable products can be used to extrapolate the failure times, and subsequently, predict the remaining useful time‐to‐failure distribution. Different degradation failure mechanisms should be treated specifically to achieve an accurate estimation and prediction. In this study, a typical sequential hard and soft failure mode is investigated while applying the lifetime delayed degradation processes (LDDP) modeling framework. This study focuses on the gamma process, which is combined with location‐scale‐family lifetime distributions and a general reliability inference approach that is applied based on the likelihood. Furthermore, the optimal inspection planning issue with the corresponding process is formulated. The determination of Fisher information (D‐optimality) is used to evaluate the efficiency of the different inspection plans to obtain more information during the degradation process. This study consisted of comprehensive simulations with a more accurate mean time‐to‐failure (MTTF) estimation for the reliability analysis and the inspection starting time that is optimized for planning. A practical crack inspection dataset is also used in this investigation. Herein, the optimal time was simplified while considering the first inspection time and the equivalent inspection interval. It has been proved from the simulation that the inspection number affects the peak value of the Fisher information. This study helps to reduce the experiment sample size and improve the estimation of reliability effectively in engineering.

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Section: Introductionmentioning

confidence: 99%

Statistical analysis and optimal inspection planning for lifetime delayed gamma degradation processes

Yang

et al. 2021

Quality & Reliability Eng

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“…A few investigations have been carried out to explore the fatigue reliability of metallic materials. Wirsching [9][10][11][12] studied probabilistic and statistical methods for assessing fatigue in design and analysis. New methods were proposed to analyze the reliability of both individual joints and the overall system, with consideration of crack initiation.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Life Evaluation Considering Fatigue Reliability and Fatigue Crack for FV520B-I in VHCF Regime Based on Fracture Mechanics

Wang

Yang

et al. 2020

Metals

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This paper focuses on the fatigue reliability analysis and the development of a new life model of reliability and crack growth mechanisms in FV520B-I (high strength martensitic-type stainless steels) in the very-high cycle fatigue (VHCF) regime, which haven’t been studied well. First, the fatigue test was carried out to clarify the fatigue failure mechanism in the very-high cycle regime. Based on the test results and fatigue reliability theory, the fatigue life distribution and P-S-N curves were modeled. A new fatigue life evaluation model for FV520B-I is proposed according to the fracture mechanics and classic life evaluation method. With the comprehensive application of P-S-N curves and a new proposed fatigue life evaluation model, a new assumption of a P-Sc-N curve is developed and verified, to quantitatively express the relationship between fatigue life, reliability and fatigue cracking. This is novel and valuable for further fatigue study of FV520B-I.

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Summary of Mechanisms of Failure and Associated PoF Models

2017

Probabilistic Physics of Failure Approach to Reliability

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Fatigue Crack Initiation—Propagation Reliability Model

Cited by 11 publications

References 8 publications

Statistical analysis and optimal inspection planning for lifetime delayed gamma degradation processes

Statistical analysis and optimal inspection planning for lifetime delayed gamma degradation processes

Fatigue Life Evaluation Considering Fatigue Reliability and Fatigue Crack for FV520B-I in VHCF Regime Based on Fracture Mechanics

Summary of Mechanisms of Failure and Associated PoF Models

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