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公开(公告)号：US20230333065A1
公开(公告)日：2023-10-19
申请号：US18340878
申请日：2023-06-25
Applicant: Taiyuan University of Technology
Inventor： Peng Liu , Chaozhu Fan , Han Wang , Fujiang Cui , Zhiqiang Li
CPC classification number: G01N29/07 , G01N29/4472 , G01N29/041 , G01N2291/011 , G01N2291/0231
Abstract: The present disclosure discloses a method of identifying delamination damage of an arc-shaped composite laminate, and belongs to the technical field of delamination damage identification. According to the method, an elliptical loci method and a fitted normal PDF for damage imaging are probabilistically integrated under a Bayesian framework. A plurality of characteristics sensitive to damage can be reasonably fused, known prior information is combined with measured time of flight (ToF) data, and the posterior distribution of unknown parameters is sampled by using a Markov Chain Monte Carlo (MCMC) algorithm, so that the reliability of damage location is improved, and the applicability of Lamb waves in damage location of plate structures is enhanced. In addition, the present disclosure can accurately identify the delamination damage of the arc-shaped composite laminate by processing the measured time of flight (ToF), and the absolute positioning error is less than 1 cm.
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公开(公告)号：US11846607B2
公开(公告)日：2023-12-19
申请号：US18340878
申请日：2023-06-25
Applicant: Taiyuan University of Technology
Inventor： Peng Liu , Chaozhu Fan , Han Wang , Fujiang Cui , Zhiqiang Li
CPC classification number: G01N29/07 , G01N29/041 , G01N29/4472 , G01N2291/011 , G01N2291/0231
Abstract: The present disclosure discloses a method of identifying delamination damage of an arc-shaped composite laminate, and belongs to the technical field of delamination damage identification. According to the method, an elliptical loci method and a fitted normal PDF for damage imaging are probabilistically integrated under a Bayesian framework. A plurality of characteristics sensitive to damage can be reasonably fused, known prior information is combined with measured time of flight (ToF) data, and the posterior distribution of unknown parameters is sampled by using a Markov Chain Monte Carlo (MCMC) algorithm, so that the reliability of damage location is improved, and the applicability of Lamb waves in damage location of plate structures is enhanced. In addition, the present disclosure can accurately identify the delamination damage of the arc-shaped composite laminate by processing the measured time of flight (ToF), and the absolute positioning error is less than 1 cm.
