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Air-coupled ultrasonic inspection of thermoplastic composite structures for aerospace vehicles

Huber, Armin (2023) Air-coupled ultrasonic inspection of thermoplastic composite structures for aerospace vehicles. In: Papers of the ECNDT 2023 (ECNDT 2023*), 1 (1), pp. 1-6. NDT.net. 13th European Conference on Non-Destructive Testing (ECNDT 2023), 2023-07-03 - 2023-07-07, Lissabon, Portugal. doi: 10.58286/28105. ISSN 2941-4989.

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Official URL: https://www.ndt.net/search/docs.php3?id=28105


Composites have become the most important type of material used in the manufacturing of aerospace vehicle components. One focus of the German Aerospace Center is to develop cost-efficient manufacturing processes for large-scale composite components such as liquid hydrogen tanks, rocket booster pressure vessels, and aircraft fuselages. To enable a high degree of automation in the manufacturing, robot-assisted tape-laying processes with flash lamp consolidation of thermoplastic prepregs are preferred. Nondestructive inspection is crucial to monitor manufacturing quality, and various forms of ultrasonic inspection have become standard. Air-coupled ultrasonic inspection is applied at the German Aerospace Center, and since access to the component is usually available only from one side, Lamb waves are excited and detected in focused slanted reflection mode. Like the manufacturing process, air-coupled ultrasonic inspection has been automated as well to avoid a significant pause during or after manufacturing. The paper demonstrates the robot-assisted air-coupled ultrasonic inspection of a liquid hydrogen tank. The robotic program is generated using offline programming software, based on the topography of a CAD model of the hydrogen tank. The inspection is carried out by scanning the component while ultrasonic pulses are triggered on a regular grid. The ultrasonic A-scans together with the measurement coordinates are monitored simultaneously. The data are used to generate and evaluate a three-dimensional C-scan

Item URL in elib:https://elib.dlr.de/195908/
Document Type:Conference or Workshop Item (Speech)
Title:Air-coupled ultrasonic inspection of thermoplastic composite structures for aerospace vehicles
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Huber, ArminUNSPECIFIEDhttps://orcid.org/0000-0002-5694-8293UNSPECIFIED
Date:1 August 2023
Journal or Publication Title:Papers of the ECNDT 2023 (ECNDT 2023*)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-6
Series Name:Research and Review Journal of Nondestructive Testing (ReJNDT)
Keywords:H2 Tank; CAD model; Robot; Automation; Off-line Programming
Event Title:13th European Conference on Non-Destructive Testing (ECNDT 2023)
Event Location:Lissabon, Portugal
Event Type:international Conference
Event Start Date:3 July 2023
Event End Date:7 July 2023
Organizer:Portuguese Society of NDT (FSEND-RELACRE)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Structural Materials and Design
Location: Augsburg
Institutes and Institutions:Institute of Structures and Design > Automation and Production Technology
Deposited By: Huber, Armin
Deposited On:08 Sep 2023 13:42
Last Modified:24 Apr 2024 20:56

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