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Interpolating S-N Data

When doing stress life fatigue analysis of spectral loading, interpolating S-N data becomes necessary.  MEboost has three methods to do this, depending on the data available. Background on Cumulative Fatigue Damage Before proceeding, let’s briefly explain why we need to interpolate.  With spectral loading, the stress cycles are varying with time.  The first step is …

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The Risks Hidden in Single Point Estimates

Building a spreadsheet model for a business case, product profitability projection, etc. often entails estimating some input factors.  The estimates are often a most likely value, an estimated average, or median.  These are single-point estimates since you’re only using one number (a single data point) for each input.  Finally, you get an output number from …

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Optimizing a Design with Monte Carlo Simulation

Performance and cost trade-offs are a constant in engineering design.  Optimizing a design to balance these competing forces can be challenging to quantify and we often have to resort to experience or intuition.  One of the traditional cost drivers is specifying tolerances.  Part dimensions are naturally random variables since each part manufactured will not be …

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