Non destructive investigation of defects in composite structures by three infrared thermographic techniques

This paper investigates full-field measurement techniques based on Infrared Thermography for Non Destructive Testing (NDT) applications on composite materials. Three methods have been implemented and the paper intends to characterize and compare their defect detection limit and related specific application fields. Various composites have been considered in this study, namely laminates and sandwich structures, in order to address many important issues of performance assessment for the aviation industry

Non destructive investigation of defects in composite structures by fullfield measurement methods

This paper presents different interests of non destructive full-field measurement. More precisely, it focuses on the characterization and the comparison of the X-ray tomography and two methods of infrared thermography in order to define the defect detection limits and to precise the specific application fields for each technique on multi-layered and sandwich composite structures. The obtained results are qualitatively and quantitatively analyzed

Non destructive testing of artificial defects in composite structures by thermal full field measurement methods

In order to achieve outstanding performance, it now seeks to optimize more and more the design and process of composite structures. Many applications require specific technical inspections at various steps of the product lifetime to assess their structural health. In such a context, non destructive techniques (NDT) offer an interesting and appropriated tool for the analysis of structural parts. For aviation industry, the AITM standards are precisely based on the NDT ultrasonic testing for the validation of composite structures. Since recent years, the use of full-field measurement NDT as infrared (IR) thermography is developing for their fast execution and analysis (defect mapping in one shot) and for the global inspection aspect. This work consists in characterizing and in comparing three thermal full-field measurement NDT in order to define the defect detection limits, the advantages and the limitations for each technique on multi-layered and sandwich composite structures

Non destructive testing of artificial defects in composite structures by thermal full field measurement methods

International audienceIn order to achieve outstanding performance, it now seeks to optimize more and more the design and process of composite structures. Many applications require specific technical inspections at various steps of the product lifetime to assess their structural health. In such a context, non destructive techniques (NDT) offer an interesting and appropriated tool for the analysis of structural parts. For aviation industry, the AITM standards are precisely based on the NDT ultrasonic testing for the validation of composite structures. Since recent years, the use of full-field measurement NDT as infrared (IR) thermography is developing for their fast execution and analysis (defect mapping in one shot) and for the global inspection aspect. This work consists in characterizing and in comparing three thermal full-field measurement NDT in order to define the defect detection limits, the advantages and the limitations for each technique on multi-layered and sandwich composite structures