A New Method of Fault Detection of a Logic Circuit by Use of M-Sequence Correlation Method

Neutron irradiation embrittlement of reactor pressure vessel steels is an important ageing issue for the long term operation of light water reactors. A new embrittlement correlation method was developed by CRIEPI and the Japanese electric utilities in 2007. This method is primarily based on the fundamental understandings on the embrittlement mechanisms: i.e. microstructural changes were modeled by the mathematical form of rate equations, and the predicted microstructural changes were further correlated with the mechanical property changes in transition temperature region. The coefficients of the rate equations were optimized using the Japanese surveillance data of RPV embrittlement. This method was adopted as the revision of the Japanese code, JEAC 4201–2007, in 2007. In this paper, after a brief explanation on the new correlation method, the predictions of the new method will be investigated through comparisons with the previous correlation, JEAC4201–2004, and the US surveillance data in order to identify the characteristics of the new method.

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New Estimation Method of Fatigue Properties of Aluminum Alloys

Journal of Engineering Materials and Technology ◽

10.1115/1.1562953 ◽

2003 ◽

Vol 125 (2) ◽

pp. 208-214 ◽

Cited By ~ 14

Author(s):

Jun-Hyub Park ◽

Ji-Ho Song

Keyword(s):

Aluminum Alloys ◽

Optimization Technique ◽

Estimation Method ◽

Correlation Method ◽

New Method ◽

Fatigue Properties ◽

Tensile Data ◽

Point Correlation ◽

Quantitative Manner ◽

Life Predictions

A new method on estimating fatigue properties from simple tensile data was proposed for aluminum alloys. The method is based on experimental strain-life curves. An optimization technique was used to get the best fatigue properties. The four-point correlation method, the universal slopes method, Mitchell’s method, the modified universal slopes method, the uniform material law by Ba¨umel and Seeger, the modified four-point correlation method by Ong and a new method proposed in this work were evaluated in a quantitative manner. Mitchell’s method, the uniform materials law and the new method give good life predictions for aluminum alloys. In particular, the new method provided the best results.

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Broken Rotor Bar Fault Detection Analysis

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.1862 ◽

2011 ◽

Vol 383-390 ◽

pp. 1862-1866

Author(s):

Li Ling Sun ◽

Kai Bin Chen

Keyword(s):

Fault Diagnosis ◽

Fault Detection ◽

Induction Motor ◽

New Method ◽

Broken Rotor Bar ◽

Detection Analysis

Induction motor is widely applied to people's lives and production. This paper presents the simple and sophisticated of some methods which are used to diagnose the rotor fault. After analyzing the advantage and disadvantage of these methods, this paper tells what the key of rotor fault diagnosis of induction motor is, and put forward a new method.

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