Designing a Specified Reliability Directly into a Component 640615

The methodology of designing by safety factors is presented and fallacies involved are discussed. Safety margin concepts are analyzed and their inadequacies presented. The necessity of specifying and determining the parameters defining the distributions of stress and strength is expounded. Probabilistic methods of calculating the reliability of components from their stress and strength distributions is developed and illustrated. Monte Carlo techniques of determining stress and strength distributions, given the distributions of the parameters affecting them are presented. The advantages and the limitations of the various methodologies are discussed and recommendations are made.


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