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PROBABILISTIC FATIGUE LIFE PREDICTION USING ULTRASONIC INSPECTION DATA CONSIDERING EIFS UNCERTAINTY
PROBABILISTIC FATIGUE LIFE PREDICTION USING ULTRASONIC INSPECTION DATA CONSIDERING EIFS UNCERTAINTY
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机译:使用考虑EIFS不确定性的超声检查数据进行概率疲劳寿命预测
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摘要
A method for probabilistically predicting fatigue life in materials includes sampling (41) a random variable for an actual equivalent initial flaw size (EIFS), generating (42) random variables for parameters (InC, m) of a fatigue crack growth equation [Formula should be inserted here] from a multivariate distribution, and solving (43) the fatigue crack growth equation using these random variables. The reported EIFS data is obtained by ultrasonically scanning a target object, recording echo signals from the target object, and converting echo signal amplitudes to equivalent reflector sizes using previously recorded values from a scanned calibration block. The equivalent reflector sizes comprise the reported EIFS data.
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