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Project: In-service Inspection for Advanced Composite Aerospace Structures

Acronym: I2ACAS
Main Objective: I2ACAS aims at developing, integrating and validating an innovative in-service inspection system to detect damages in carbon fibre reinforced polymer (CFRP) aerospace structures. The increasingly use of CFRP materials in aerospace structures is due to their lighter weight and improved strength, when compared to metals, and the capability to be readily formed into custom shapes to meet unique requirements. Nondestructive evaluation (NDE) techniques, however, have been problematic to employ. This calls for new efficient, reliable, sensitive and selective NDE methods for in-service inspections.
No single method can fulfil all requirements due to the complexity and diversity of the advanced composite structures used in the aerospace industry. The I2ACAS proposes an original approach that combines two NDE techniques: guided ultrasound Lamb waves (GLW) and eddy currents (ECT). The experimental data derived from GLW and ECT methods contains complementary information about the specimen under test, enhancing the chances to detect the different damages that occur at the various stages of the material’s whole life cycle. It has been shown that GLW technique provides reliable information about delamination, transverse ply cracks and through-holes whereas the conductive fibres of the CFRP will allow ECT imaging to isolate fibre defects. Moreover, the outcome of this project shall fall between conventional NDE and a fully integrated SHM system.
Reference: PTDC 2017 - PTDC/EEI-EEE/30723/2017
Funding: FCT/COMPETE/FEDER
Start Date: 01-10-2018
End Date: 30-09-2022
Team: Helena Maria dos Santos Geirinhas Ramos, Artur Fernando Delgado Lopes Ribeiro, Jorge Manuel Torres Pereira, Dário Jerónimo Pasadas, Bo Feng, Prashanth Baskaran
Groups: Instrumentation and Measurements – Lx, Optical communication systems
Partners: CEIIA, TEKEVER
Local Coordinator: Helena Maria dos Santos Geirinhas Ramos
Associated Publications