Extended Ndt for the Quality Assessment of Adhesive Bonded Cfrp Structures
Year: 2011
Type: conference-paper
Abstract: Due to the increased use of carbon fibre reinforced plastics (CFRP) and the constant urge for lighter structures, adhesive bonding as an assembly technology has a great potential for high-loaded structures in the aeronautic industry. A prerequisite for such an application is that the bond quality of the adhesive joint can be controlled in a non destructive way. Non-destructive testing (NDT) methods exist for the characterisation of defects like pores, delamination or debonding in adhesive bonds. However, these NDT methods for conventional “defectoscopy” do not allow the control of selected physic-chemical properties of the adherend surface and the adhesive joint, which are decisive for the mechanical performance of the adhesive bonds. This lack is an obstacle to a wider deployment of adhesive bonding technology. For this reason, the scope of NDT methods has been widened by Airbus and Fraunhofer IZFP towards “propertyscopy” as new field of technology that has been named ‘Extended NDT’. This presentation highlights the most important use cases and requirements for Extended NDT in the field of adhesive bonding of CFRP structures. Moreover, on these bases recent results from research and development and feasibility studies of Extended NDT are presented. Among these methods, the approach of proof test methods including laser adhesion test, based on high intensity short laser pulse will be presented. These laser adhesion tests generate an elastic shock wave that disbonds the weak adhesive bonds, making the defect visible for other NDT techniques (thermography, US scan, etc...) and so, aim at ensuring the quality of optimal adhesive bonds.
Language: English
Subfield: Mechanics of Materials
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2308043826