SMART

• Probability calculations

–Single flight probability of failure (Lincoln and Freudenthal)

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–Percent cracks detected at inspections

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• Probabilistic methods

–Standard Monte Carlo (multi-threaded)

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–Numerical integration

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–Weighted Branch Integration Method

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–Adaptive Multiple Importance Sampling

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• Random variables

–ai, Kc, EVD, yield strength, ultimate strength, da/dN, hole diameter, hole offset, crack aspect ratio

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• Crack growth

          –Master curve (ai, Kc and yield strength) interpolation (user input)

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–Through, Corner, Surface cracks

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–HyperGrow (efficient crack growth analysis)

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–Failure due to fracture instability or net section yield

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• Extreme Value Distribution

–User input, e.g., Gumbel, Frechet , and Weibull-Max.

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–Ultimate/Limit load (deterministic)

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–Computed from exceedance curves, weight matrix, etc. (Gumbel, Frechet , and Weibull-Max)​

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• Inspection capabilities

–Any number of inspections

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–Arbitrary repair crack size distribution (lognormal, Weibull, deterministic, tabular)

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–Arbitrary POD (lognormal, deterministic, tabular)

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–User defined probability of inspection

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–Different repair scenarios between inspections

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• Probabilistic Database

–Material Properties (Kc, da/dN, yield, ultimate) Aluminum, steel, titanium

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–Equivalent initial flaw size

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–Probability of Detection Curve

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–Hole diameter

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–Edge distance

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–Exceedance curves

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• Loading Generation

–Computed from exceedance curves (Internal library and user exceedance option) – Weighted usage available.

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–Flight Duration and weight matrices, design load limit factors, one-g stress, and ground stress

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–Stresses and/or flights randomizations

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–Spectrum editing option (Rainflow, rise/fall, Dead band)

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–User-defined spectra (Afgrow format)​​​​​​

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• Computational Implementation

–Standard Fortran 95/03/08, Windows, Mac OS and Linux

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–HPC Implementation (parallel and vectorized)

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