Quantitative comparison of different non-destructive techniques for the detection of artificial defects in fiber reinforced composites

Speaker:
Maierhofer, Christiane; BAM Bundesanstalt fur Materialforschung und -prufung; Germany

Authors:
Krankenhagen, R.; Federal Institute for Materials Research and Testing (BAM); Germany
Maierhofer, C.; Federal Institute for Materials Research and Testing (BAM); Germany
Heckel, T.; Federal Institute for Materials Research and Testing (BAM); Germany
Brackrock, D.; Federal Institute for Materials Research and Testing (BAM); Germany
Gower, M.; National Physical Laboratory (NPL); United Kingdom
Lodeiro, M.; National Physical Laboratory (NPL); United Kingdom
Baker, G.; National Physical Laboratory (NPL); United Kingdom

ID: ECNDT-0297-2018
Download: PDF
Session: Composite General 2
Room: G1
Date: 2018-06-11
Time: 15:40 - 16:00

For assuring the safety and reliability of components and constructions in energy applications made of fiber reinforced composites (e. g. blades of wind turbines and tidal power plants, engine chassis, flexible oil and gas pipelines), innovative non-destructive testing methods are required. Within the EMRP project VITCEA [1] complementary methods (shearography, microwave, ultrasonics and thermography) have been further developed and evaluated. For the evaluation, a series of test specimens with artificial and natural defects were used and the detectability as well as the lateral sizing of these defects were analyzed.

This contribution is focused on the direct comparison of the four methods in case of one defect class: Teflon inserts in order to represent inner delaminations. All methods have specific requirements and application limits. The achieved spatial resolution and detection limits are compared and discussed. The results allow an evaluation of the particular nondestructive testing methods and enable a recommendation for their application in the industrial sector.

[1] EMRP-Project VITCEA Validated Inspection Techniques for Composites in Energy Applications, ENG57 (http://projects.npl.co.uk/vitcea/ )