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RELIABILITY ASSURANCE METHOD OF PRODUCT MADE OF BRITTLE MATERIAL, MANUFACTURING METHOD, RELIABILITY ASSURANCE DEVICE, AND RELIABILITY ASSURANCE PROGRAM
RELIABILITY ASSURANCE METHOD OF PRODUCT MADE OF BRITTLE MATERIAL, MANUFACTURING METHOD, RELIABILITY ASSURANCE DEVICE, AND RELIABILITY ASSURANCE PROGRAM
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机译:脆性材料制成的产品的可靠性保证方法,制造方法,可靠性保证装置和可靠性保证程序
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摘要
PROBLEM TO BE SOLVED: To perform life prediction being a relationship between a load and a breaking probability after a predetermined period with a reduced frequency of tensile test, and guarantee the reliability, in a product made of a brittle material such as an optical fiber in which strength distribution comprises a mixed system of two Weibull distributions of a high strength area and a low strength area.;SOLUTION: A reliability assurance method is characterized by including: a step of inputting data of the breaking strength showing tensile test results of multiple products; a step of finding non-reliability corresponding to multiple data and calculating a cumulative hazard value; a step of applying a set of the multiple data and the cumulative hazard value to a cumulative hazard function of a high strength area, and estimating a geometry parameter and a scale parameter to estimate the cumulative hazard function of the high strength area; and a step of calculating the relationship between a load and the breaking probability after a predetermined period based on the cumulative hazard function of the high strength area, and estimating a calculable range capable of predicting the breaking probability based on the input data of the breaking strength in the relationship.;COPYRIGHT: (C)2015,JPO&INPIT
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