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Stress–strength analysis
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Stress–strength analysis : ウィキペディア英語版
Stress–strength analysis

Stress–strength analysis is the analysis of the strength of the materials and the interference of the stresses placed on the materials, where "materials" is not necessarily the raw goods or parts, but can be an entire system. Stress-Strength Analysis is a tool used in reliability engineering.
Environmental stresses have a distribution with a mean \left(\mu_x\right) and a standard deviation \left(s_x\right) and component strengths have a distribution with a mean \left(\mu_y\right) and a standard deviation \left(s_y\right). The overlap of these distributions is the probability of failure \left(Z\right). This overlap is also referred to stress-strength interference.
== Reliability ==
If the distributions for both the stress and the strength both follow a Normal distribution, then the reliability (R) of a component can be determined by the following equation:
R = 1 - P(Z), where
Z = -\frac{\sqrt{ s_x^2 + s_y^2}}
P(Z) can be determined from a Z table or a statistical software package.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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