Publications /  Presentations

A selection of presentations and publications...

Journal papers:

Automated Evaluation Algorithms for Online Defect Detection in Carbon Fibre Tape Laying Processes: A Review

2024, Composite Structures (submitted)

• Manual quality inspection of carbon fibre tape layups consumes 50% of production time in the aerospace industry.

• Automated inspection systems, particularly those utilising image evaluation software based on expert systems and machine learning methodologies, are being explored as alternatives.

• A proposed benchmark dataset based on a geometric model incorporating features relevant to various laying processes aims to enable fair benchmarking and informed decision-making in selecting suitable approaches for manufacturing applications.

Effects of Gaps and Overlaps in Dry Fibre Tape Layups on the Mechanical Properties

2024, Composite Part A (submitted)

• Experiments with gaps and overlaps in the 90-deg orientation indicated that these defects induce undulations in the adjacent layers. The severity, however, does not correlate linearly with the defect dimensions. Theories from experiments using prepreg materials cannot be applied.

• Gaps in the layups lead to fraying in the adjacent layers and overlaps to buckles in the outer layers. These secondary effects reduce the compressive strength by up to 61% and tensile strength by up to 9%.

• Overlaps should be prevented by designing the layup strategy accordingly. Mitigation strategies, such as staggering and compensation by inverse defect alignment, should be applied whenever possible.

Presentations:

SCAP (Stuttgart Conference on Automobile Production):

16. - 19. November 2022 - Stuttgart, Germany

• Detection of Gaps and Overlaps in Laser Line Triangulation Data of Dry Fibre Tape Layups using Image Projection

• Combination of the Scanning and the Polar Measuring Method for the Defect Detection in DryFibre Layups using an Eddy Current Sensor

Download link: https://link.springer.com/book/10.1007/978-3-031-27933-1

Carbon Fibre Futures Conference 

8. - 10- May 2023 - Geelong, Australia

• The Combination of Image Projection and Sigmoid Approximation for the Defect Detection in Dry Fibre Tape Layups

Download links:  Abstract, Presentation