Comparative Numerical and Experimental Modal Analysis of Aluminum and Composite Plates

Baltić, Marija; Svorcan, Jelena; Pekovic, Ognjen; Ivanov, Toni

doi:10.1007/978-3-030-30853-7_4

Cited by 1 publication

(3 citation statements)

References 13 publications

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“…Although this was to be expected since the total mass of the plate is slightly reduced, the observed (not negligible) difference clearly points to the change in plate dynamic characteristics and can be used as a useful parameter (quantifier) for monitoring the structure's current state. Plate 2 (symmetric type) behaves similarly to a unidirectional structure that was investigated in previous studies [10]. It is significantly more rigid than plate 1.…”

Section: Resultsmentioning

confidence: 78%

“…A novel and attractive contactless digital image correlation (DIC) system based on the principles of digital photography and modern computer technology can be used for point displacement measurement [5,6]. A typical DIC system [9,10] consists of a sensor unit (A) (in our case two highquality, ultrafast cameras FASTCAM SA6 75K-M3 with 32 GB memory, maximum recording frequency 75.000 fps, maximum resolution 1920 × 1440 pixels), a power control device for image recording (performed by the Photron software package here) and a system for data acquisition, processing and analysis (B) (in our case done by the ARAMIS software package) and a sample set-up (C), see Fig. 2.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…This paper investigates the possibility of applying a novel, contactless, non-invasive method [5][6][7][8][9][10] to observe the changes in the natural frequencies of composite plates that have been deliberately damaged. Here, damage is defined as a series of changes in material structure and/or physical characteristics that affect the performance and integrity of the whole system.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modal analysis of composite plates: Digital image correlation method application

Baltić¹,

Vorkapić²,

Ivanović³

et al. 2023

tribomat

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Composite materials and structures are widely used and applied in many industries owing to their advantages, such as satisfactory stiffness-to-mass ratio and corrosion resistance. However, during their operating life, responsible parts subject to complex loads may change and their properties might deteriorate. To ensure structural integrity it is necessary to monitor and regularly check the performance of composite structures. This paper investigates the change of frequency characteristics of two rectangular composite (carbon-epoxy) plates after inflicting structural damage. Following the necessary preparation of the structure's upper surfaces by white-and-black stochastic pattern, the responses (free vibratory movement) of structures to momentary excitation were recorded by an optical, contactless 3D digital image correlation (DIC) system that contains a set of ultrafast cameras. In order to determine the natural frequencies of the plates, the recorded time-domain responses were post-processed, i.e. converted to the frequency domain by fast Fourier transform (FFT). The reduction in values of natural frequencies is observed on the damaged structures. The performed experiments demonstrate the applicability of the DIC method in the structural health monitoring of composite parts.

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Section: Resultsmentioning

confidence: 78%