1992 Volume 58 Issue 549 Pages 765-768
In reliability-based design and reliability testing, the reliability and confidence level are used together when distribution parameters are unknown. Determination of the design allowable stress in the MIL Handbook is a typical example. This conventional method of using the two-dimensional measure is somewhat complicated, and makes it difficult to compare allowable stress based on different confidence levels. In the present paper, the idea of using the mean reliability as a one-dimensional measure was proposed. This idea was applied to the determination of the design allowable stress Sa for the case when the strength follows a normal distribution N(μ, σ2). The factor k in the expessions of Sa= μ-kσfor the case of unknown μ, and Sa= μ-kσ for the case of unknown μand σ was derived based on this idea, where μand σare estimated values. A method for specifying the design goal of the mean reliability was also proposed. Furthermore, the meaning of the product of reliability and confidence level was clarified.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Transactions of the Japan Society of Mechanical Engineers Series C
Transactions of the Japan Society of Mechanical Engineers Series B