Preston, D.; Ashour, A.; Wright, J.; Watts, J.; Sanmartin, D.; Wood, J. Controlled Creation of Contact Cracks in Additive Manufactured Components. Appl. Sci.2023, 13, 11990.
Preston, D.; Ashour, A.; Wright, J.; Watts, J.; Sanmartin, D.; Wood, J. Controlled Creation of Contact Cracks in Additive Manufactured Components. Appl. Sci. 2023, 13, 11990.
Preston, D.; Ashour, A.; Wright, J.; Watts, J.; Sanmartin, D.; Wood, J. Controlled Creation of Contact Cracks in Additive Manufactured Components. Appl. Sci.2023, 13, 11990.
Preston, D.; Ashour, A.; Wright, J.; Watts, J.; Sanmartin, D.; Wood, J. Controlled Creation of Contact Cracks in Additive Manufactured Components. Appl. Sci. 2023, 13, 11990.
Abstract
Techniques for the controlled seeding and growth of cracks are urgently required for non-destructive testing technique evaluation, particularly for additive manufactured (AM) samples. This paper describes a method which uses a combination of tensile load and resonance excitation of notched AM samples, with in-situ monitoring of the resonance frequency serving to track crack dimensions. Mechanical low-cycle fatigue cracks, ranging in length from ~0.3 mm to ~5 mm, are successfully created in five AM samples using this technique. The samples are non-destructively characterized using optical microscopy and Nonlinear Resonance (NLR) testing. The exploitation of resonance enables the concentration of a significant number of stress cycles on the samples in much shorter timespans than conventional fatigue testing, enabling high throughput, while utilising compact components. Furthermore, the tracking of resonance frequency shift throughout the process enables non-invasive and non-contact real-time condition monitoring.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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