Some Studies Verify the Applicability of the Free Vibration Method of Crack Detection in Composite Beams for Different Crack Geometries
Main Article Content
Abstract
Defect detection and classification are important issues as they cause structures to catastrophic failure. Many flaws have already been addressed, but non-destructive testing techniques for composite materials have been widely used. However, the impact of arbitrary and unpredictable flaw geometry on these approaches' applicability has yet to be observed. This paper considers the cases of a previously published article, i.e., pultrusion-produced orthotropic (GFRP) cracked cantilever beam, to determine the crack location and depth. In contrast to the well-known V-shaped crack, a new fracture model (a combination of rectangular and V-shaped) is presented due to its practical importance. Using ANSYS software, FEA simulations were carried out on the new and V-shaped crack models for the natural frequencies. The maximum percentage error for the natural frequency between new and V-shaped crack models for the same configurations was only up to 1.815. Then, the ANN model was trained using the natural frequencies dataset of V-shaped cracked cases only. Afterward, the ANN model was used for predicting the crack locations and crack depths in beams, i.e., V-shaped cracked beams and a combination of rectangular and V-shaped (new crack model) cracked beams. The ANN model gave good results for predicting the crack locations and depths in composite cantilever beams irrespective of the crack geometries. Hence, it is clear that even though the ANN model was trained using the dataset of V-shaped cracked cases, it accurately predicts the crack locations and depth in the beams, which have had new geometry.
Downloads
Article Details
Journal author rights
In order for Romanian Journal of Acoustics and Vibration to publish and disseminate research articles, we need publishing rights. This is determined by a publishing agreement between the author and Romanian Journal of Acoustics and Vibration. This agreement deals with the transfer or license of the copyright to Romanian Journal of Acoustics and Vibration and authors retain significant rights to use and share their own published articles. Romanian Journal of Acoustics and Vibration supports the need for authors to share, disseminate and maximize the impact of their research and these rights, in Romanian Journal of Acoustics and Vibration proprietary are defined below:
For subscription articles:
Authors transfer copyright to the publisher as part of a journal publishing agreement, but have the right to: Share their article for personal use (manuscript version); retain patent, trademark and other intellectual property rights (including research data); proper attribution and credit for the published work.
For open access articles:
Authors sign an exclusive license agreement, where authors have copyright but license exclusive rights in their article to the publisher. In this case authors have the right to: share their article in the same ways permitted to third parties under the relevant user license; retain patent, trademark and other intellectual property rights (including research data); proper attribution and credit for the published work.
Rights granted to Romanian Journal of Acoustics and Vibration
For both subscription and open access articles, published in proprietary titles, Romanian Journal of Acoustics and Vibration is granted the following rights:
- The exclusive right to publish and distribute an article, and to grant rights to others, including for commercial purposes;
- For open access articles, Romanian Journal of Acoustics and Vibration will apply the relevant third party user licence (Open access licencses) where Romanian Journal of Acoustics and Vibration publishes the article on its online platforms;
- The right to provide the article in all forms and media so the article can be used on the latest technology even after publication;
- The authority to enforce the rights in the article, on behalf of an author, against third parties, for example in the case of plagiarism or copyright infringement.