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A 3D FEA LEFM based modeling approach is used to demonstrate crack path solution accuracy and sensitivity using six mixed‐mode (I + II) fatigue crack growth measurements as references. The physical measurements were obtained from mechanical testing of slightly different tapered double cantilever beam specimen geometries. Solution sensitivity is addressed in a deterministic manner by quantifying the geometric deviations of each physical specimen from the nominal design specifications and by considering uncertainties in the assumed position of the initial crack.
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Loghin et al. (2026) studied this question.
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