ALTA ALTA Standard Folio Data Eyring-Lognormal: Difference between revisions
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Revision as of 16:53, 24 January 2012
Reliability Web Notes |
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Standard Folio Data Eyring-Lognormal |
ALTA |
The [math]\displaystyle{ pdf }[/math] of the lognormal distribution is given by:
• [math]\displaystyle{ {{\sigma }_{{{T}'}}}= }[/math] standard deviation of the natural logarithms of the times-to-failure.
[math]\displaystyle{ f(T,V)=\frac{1}{T\text{ }{{\sigma }_{{{T}'}}}\sqrt{2\pi }}{{e}^{-\tfrac{1}{2}{{\left( \tfrac{{T}'+\ln (V)+A-\tfrac{B}{V}}{{{\sigma }_{{{T}'}}}} \right)}^{2}}}} }[/math] |
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