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The objective of this paper is to propose an implementation framework of the quantification of margins and uncertainties (QMU) calculation for reliability and safety assessment of high-consequence systems in the presence of mixed (aleatory and epistemic) uncertainties. The aleatory and epistemic uncertainties are represented by a probability distribution and the Dempster–Shafer theory of evidence...
For analyzing the effects of the uncertainties of the fuzzy failure criterion and the input variables on fuzzy failure probability, the moment-independence importance measure (MIIM) model on the fuzzy failure probability for the fuzzy state structural system is proposed. Firstly, according to the fuzzy random theory, the fuzzy failure criterion is transformed into the equivalent additional random...
Pitting corrosion is one of the most destructive types of metal degradation and it can result in catastrophic failure of components due to transition of pits to stress corrosion cracks under loading. To facilitate the implementation of corrosion prognostics and health management, in paper presents a finite element approach for the simulation of stable pit growth with stress loads through a multi-physics...
This paper presents a physics of failure model for pitting corrosion with the coupled effect of corrosion environment and mechanical stresses. With the developed model, corrosion damage growth can be projected and corrosion reliability can be analyzed. To carry out corrosion reliability analysis, the developed pitting corrosion model can be formulated as time-dependent limit state functions considering...
The risk assessment model of radioactive material release for transport accident is discussed in this paper. Based on the statistical data of transport accident and the classification of the accident severity, the quantitative assessment method of radioactive materials release rate in transport accidents is developed. Then, the consequence of the radioactive material release accident is predicted...
Surety was presented by sandia national laboratory during the safety study of nuclear weapon. At the same time, surety science and engineering was formed gradually. This article discusses the definition and inside meaning of surety. For various systems, it requires various surety levels. The surety levels and the basic approaches to achieving these surety levels are discussed in the article, too....
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