Abstract
One of the main failure phenomena in composite materials is delamination, which consists of the progressive separation of plies. An augmented extended Kalman filter (KF) approach for joint input-parameter estimation is proposed and demonstrated in this work for delamination growth monitoring. In particular, a novel recursive estimation scheme for parameter identification is proposed within the joint input-parameter scheme which allows for a substantial reduction of the number of required sensors, enabling the use of the proposed KF approach. The proposed methodology also allows for the full-field response reconstruction, interface stiffness degradation monitoring and critical load identification. The methodology is validated on both simulated as well experimental data of a carbon fiber double Cantilever beam specimen, showcasing good accuracy for both cases.
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