A method and apparatus for inspecting large flat composite parts by using the Infrared LST technique

Abstract

The principle of Line Scan Thermography (LST) was used to develop a self-propelled infrared thermographic nondestructive testing device for the inspection of large, relatively flat composite aerospace parts, such as aircraft wings. The design of the unit allowed the suppression of noise from reflected radiation. The new equipment, using the LST method, provided defect detectability similar to that achieved with a classic, static, flash heating procedure, but with a higher rate of testing. Also, the line heating principle ensured more uniform thermal patterns, and the proper choice of scan speed and field of view allows the selection of optimal time delays and the creation of maps of defects at different depths. Defect characterization efficiency was improved by using a trained neural network.

The Development of a Piezoelectric Defect Detection Device Through Mathematical Modeling Applied to Polymer Composite Materials

“…Based on the analysis of the long-term strength of polymer composite materials, a novel piezoelectric device has been proposed for defect detection (Hasanov et al, 2023). The main advantage and distinctive feature of the proposed piezoelectric device, compared to devices resulting from previous research in this field (Boiprav et al, 2023;Fionov et al, 2023;Vavilov, 2020;Chulkov, 2023;Chertishchev, 2020;Slavin et al, 2022;Aamir et al, 2019;Ge et al, 2018;Shukla, 2019), lie in its real-time transmission to the layers of the composite material based on coordinates from the transmitting piezoelectric elements arranged in matrices. This design allows for adjustment during the production and operation of composite materials and their components.…”

“…The longevity and resilience of these devices are directly contingent on the nature of the degradation process occurring within the device's material. Consequently, a thorough investigation into the dissolution process is an imperative necessity in this field (Akhmedov, 2021;Boiprav et al, 2023;Fionov et al, 2023;Vavilov, 2020;Vavilov, 2022;Chulkov, 2023).…”

“…The utilization of this approach has led to the development of numerous theories regarding the long-term degradation of materials, supported by experiments conducted by various researchers (Bashirov & Ismailov, 2022;Fionov et al, 2023;Chertishchev, 2020;Slavin et al, 2022). However, alongside their advantages, these theories also exhibit limitations, which have been examined in (Akhmedov & Yusubova, 2022;Fionov et al, 2023;Vavilov, 2020;Chulkov, 2023;Chertishchev, 2020;Slavin et al, 2022;Aamir et al, 2019;Ge et al, 2018;Shukla, 2019).…”