Delamination Identification in Stiffened Composite Panels Using Surface Strain Data

Abstract:

The structural integrity of a composite structure can be greatly compromised by damage inside the component. Invisible damage, e.g. caused by low-speed impact, can significantly reduces composite components capability to efficiently carry loads. In the present study, an innovative approach of strain-based delamination identification and localization is investigated, based on the efficient processing of full-field surface strain measurements. Surface strain data, potentially derived by full-field optical methodologies are used in the assessment of the delamination pattern, through strain field perturbations caused due to damage evolution. Relations between delamination damage and surface strain field disturbances are established by exploiting data decomposition methods using Zernike polynomial moments. The methodology is successfully demonstrated in the case of a stiffened composite panel.

• Periodical: Key Engineering Materials (Volume 754)
• Pages: 379-382
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.754.379
• Online since: September 2017
• Authors: George Lampeas*, Christos Katsikeros, Konstantinos Fotopoulos
• Keywords: Composite Delamination, Stacked Shell Approach, Structural Health Monitoring (SHM)

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