LCsimulator

The choice of accelerated tests parameters for high-reliability products development Oleg Ivanov

How do you demonstrate and improve a reliability in case: ,[object Object],[object Object],In this case the goal of the tests isn't a quantification of the lifetime. The goals of the tests are check of a reliability for specific time and doing the corrective actions for improving a reliability ,[object Object],[object Object]

The solution of this problem is known: ,[object Object]

This approach allows to apply accelerated tests also:

The use of this approach has difficulties: ,[object Object],3 Impeller of gas turbine compressor 4,5 Gas turbine blade disk 3,2 Gas turbine vane 2,7 Gas turbine blades 1,5 Fatigue of the roller bearing 1,1 Shape factor Weibull Fatigue of the ball bearing 0,4 Wear of brushes of electrical machines 0,3 Wear of details 0,4 Factor of a variation Normal Fatigue of rubber 0,4 Erosion of contacts 0,33 Aging of grease of the rolling bearing 0,4 Aging of lubrication of the sliding bearing 0,3 Creep of metal 0,3 Root-mean-square deviation of a lifetime logarithm Lognormal Flexural fatigue of metal Value Deviation performance Lifetime distribution model Part of the product

The use of this approach has difficulties: ,[object Object]

Life Cycle Simulator ,[object Object],[object Object],Life Cycle Simulator is a tool for creation of such program of the tests, which reduces the risk of the consumer and the guarantee cost, reduces risk of the supplier and unreasonable rise in price of products.

Life Cycle Simulator ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Life Cycle Simulator ,[object Object]

Life Cycle Simulator ,[object Object],[object Object],[object Object],[object Object]

Life Cycle Simulator ,[object Object],We enter the mathematical models of influence of high levels accelerating variables on life time distribution parameters (e.g., Arrhenius, Coffin-Manson,..):

Life Cycle Simulator The outcome of simulation and optimization shows the optimal program of the tests:

Life Cycle Simulator ,[object Object],[object Object],[object Object]

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