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Communication Dans Un Congrès Année : 2022

Harmonic balance-based crack size estimation in an ultrasonic fatigue specimen

Résumé

Closing-opening cracks during ultrasonic fatigue tests are suspected to generate nonlinearities in the vibration signal. Due to the periodicity of the ultrasonic transducer and choice of non-smooth stiffness nonlinearity, the Harmonic Balance method is utilized to simulate the resulting 1DOF dynamic model. The energy that transferred from the fundamental harmonic to higher harmonics is represented as a harmonic amplitude ratio parameter and is utilized to inverse model a nonlinear crack parameter for an experimental signal. A feature of this dynamic model allows for the addition of nonlinear effects that evolve with the fatigue specimen's life.
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Dates et versions

hal-03960174 , version 1 (30-03-2023)

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  • HAL Id : hal-03960174 , version 1

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Shawn L. Kiser, Mikhail Guskov, Marc Rébillat, Nicolas Ranc. Harmonic balance-based crack size estimation in an ultrasonic fatigue specimen. 10th European Nonlinear Dynamics Conference, ENOC 2020, Jul 2022, Lyon, France. ⟨hal-03960174⟩
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