Experimental and theoretical investigation on transverse vibration of delaminated cross-ply composite beams

Torabi, Keivan; Samadi, Mostafa; Heidari-Rarani, M.

doi:10.1016/j.ijmecsci.2016.05.023

Cited by 26 publications

(7 citation statements)

References 33 publications

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“…Therefore, the detailed theoretical background is essential for aiding the development of these techniques. Analytical and numerical calculations of composite beams are carried out in Torabi and Shariati-Nia (2016). Here both the length and the axial location of the delamination are varied and the results are verified using modal analysis.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis for frequency based prediction of crack size in composite plates with through-the-width delamination

Juhász

Turcsán

Tóth

et al. 2017

International Journal of Damage Mechanics

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This work combines modal analysis measurements with a novel 2D finite element plate model, which is capable to determine the delamination growth based on the change in the measured frequencies. The base of the presented method is a finite element model incorporating the Classical Laminated Plate Theory, and it is capable to estimate the eigenfrequencies of a rectangular plate with through-the-width delamination and straight crack front using arbitrary boundary conditions. The model contains special types of finite elements for modelling the delamination. This results a contact free model, which improves the simulation speed significantly. Using this model, the characteristic of the change of the eigenfrequencies with respect to the delamination growth can be obtained. These results can serve as reference, and according to the theoretical curves, the actual size of the delamination can be estimated based on the change in the measured frequencies. According to our measurement results, it can serve as a good reference for modal analysis. The experiment shows that the model can predict the effect of the delamination growth on the eigenfrequencies very well. Additional conclusions are drawn based on further numerical simulations, which can aid the model based modal analysis of composite plates.

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Section: Introductionmentioning

confidence: 99%

Sensitivity analysis for frequency based prediction of crack size in composite plates with through-the-width delamination

Juhász

Turcsán

Tóth

et al. 2017

International Journal of Damage Mechanics

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“…This formulation takes into account the effect of the rotary inertia, translational inertia, gyroscopic moments and rotational stiffness and the stationary and rotational damping forces [37,38]. Other way to simulate these models, is to describe the shaft with Timoshenko beam elements, this element provide a complete behavior and effects due to rotary inertia and shear effect, many works use this element [39][40][41]. Fig.…”

Section: Finite Element Modelmentioning

confidence: 99%

The dynamic analysis of rotors mounted on composite shafts with internal damping

Mendonça

Medeiros

Pereira

et al. 2017

Composite Structures

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This paper presents a study on the dynamic analysis of rotors mounted on composite shafts. The dynamic analysis of these rotors differs from conventional analysis due to the existence of internal damping in the shaft. The shafts are made of composite materials, which exhibit viscoelastic behavior. The equations of motion for these rotors represent the influence of internal damping on the dynamic behavior of the rotor system. Composite materials can be manufactured using different layups. This study reviews the methodology that can be used to predict the equivalent mechanical properties of composite shafts. Several finite element simulations are presented to show the influence of the composite shaft layup on the dynamic behavior of the rotor. The simulation results are used to present the influence of the layup on Campbell diagrams, critical speeds, instability thresholds and frequency response functions.

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“…Complicated failure mechanisms are distinct features of carbon fiber composites, and generally include intralaminar fiber breakage, matrix cracking, fiber/matrix interface debonding, and interlaminar delamination [4][5][6]. As composites experience deformation, a variety of damage modes interact with each other [7][8][9] and it is difficult to determine the different damage mode stages in composite materials. Consequently, it is necessary to perform damage onset detection, source localization, damage classification, and premature failure predictions on composite structures.…”

Section: Introductionmentioning

confidence: 99%

Deep Learning Approach for Damage Classification Based on Acoustic Emission Data in Composite Materials

Fu-ping

Jiang

et al. 2022

Materials

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Damage detection and the classification of carbon fiber-reinforced composites using non-destructive testing (NDT) techniques are of great importance. This paper applies an acoustic emission (AE) technique to obtain AE data from three tensile damage tests determining fiber breakage, matrix cracking, and delamination. This article proposes a deep learning approach that combines a state-of-the-art deep learning technique for time series classification: the InceptionTime model with acoustic emission data for damage classification in composite materials. Raw AE time series and frequency-domain sequence data are used as the input for the InceptionTime network, and both obtain very high classification performances, achieving high accuracy scores of about 99%. The InceptionTime network produces better training, validation, and test accuracy with the raw AE time series data than it does with the frequency-domain sequence data. Simultaneously, the InceptionTime model network shows its potential in dealing with data imbalances.

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Experimental and theoretical investigation on transverse vibration of delaminated cross-ply composite beams

Cited by 26 publications

References 33 publications

Sensitivity analysis for frequency based prediction of crack size in composite plates with through-the-width delamination

Sensitivity analysis for frequency based prediction of crack size in composite plates with through-the-width delamination

The dynamic analysis of rotors mounted on composite shafts with internal damping

Deep Learning Approach for Damage Classification Based on Acoustic Emission Data in Composite Materials

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