Study of natural frequencies of natural rubber cored novel sandwich structure without tip mass

Gupta, Krishanu; Bhattacharjee, Biplab; Gupta, Sonu; Chakraborti, Prasun

doi:10.1016/j.istruc.2020.09.010

Cited by 9 publications

(2 citation statements)

References 6 publications

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“…Floor level damage investigation is conducted using response surface methodology on a six-story shear building [19]. A rubber cored sandwich structure with different dimensions is studied to analyze natural frequencies [20]. The selective index method and discontinuity in shear force technique is utilize to locate the damage [21].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of crack locations in beam using artificial neural network‐based modified curvature damage index

Gupta

Das

2023

Materialwissenschaft Werkst

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Although the frequency response‐curvature methodology is commonly used to detect irregularities in mechanical and civil structures, the artificial neural network‐based frequency response‐curvature damage index method may have good efficacy in the detection and localization of structural damages. By utilizing experimental data sets, a novel method is proposed to pinpoint a saw‐cut damage location and the degree of damage in beam models. Using a dynamic data logger, the frequency response function of a beam model is obtained for altering damage levels at different positions. As frequency response data contains environmental and operational noise, the accuracy of obtained results may get reduced. To improve the accuracy by reducing the noise effect, the experimentally obtained frequency response data is trained through an artificial neural network. Using central difference approximation, the sets of trained modal data are utilized to determine the improved mode shape curvature. The curvature damage index is then obtained by using the improved mode shape curvature for different damaged scenarios to ultimately identify structural damages.

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Section: Introductionmentioning

confidence: 99%

Evaluation of crack locations in beam using artificial neural network‐based modified curvature damage index

Gupta

Das

2023

Materialwissenschaft Werkst

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“…Moreover, the natural frequencies decrease with increasing weld energy until they reach a rapidly growing critical energy level (1225 KJ m −1 ). Gupta et al [25] examined the standard frequencies of sandwich structures with different thicknesses, i.e. 0.003 and 0.005 (m), made of natural rubber and AA1050.…”

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confidence: 99%

Influence of tool pin profiles on waviness and natural frequency during friction stir welding of Al-Li alloys plates

Kumar

Soni

Katiyar

et al. 2023

Surf. Topogr.: Metrol. Prop.

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The third generation of Al-Li 2050-T84 alloy was primarily used in aerospace industries due to its exceptional potential for weight saving, high strength, and increased fatigue crack growth resistance. In the present research, three different types of tool pin profiles, namely, hybrid, taper threaded, and triangular, were used to join 2050-T84 Al-Li alloy by using Friction Stir Welding (FSW) at a constant rotational speed of 23.33 rotation/second with a traverse speed of 0.003 meters per second and tilt angle of 2°. The research explored the effect of different tools on weld bead structure, waviness and natural frequency of welded plates. The experimental results show that the hybrid tool pin side generates 10.9% higher heat than the threaded taper tool and 25.8% higher than the triangular tool. Moreover, the hybrid tool produces 50.1% lower waviness of welded specimens than the threaded taper tool and 55.7% lower than the triangular tool at the nugget zone (NZ). The research established that a hybrid tool pin profile is advantageous as it generates a higher frequency and lower acceleration under the applied load in friction stir welded specimens.

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Characterization of mechanical and dynamic properties of natural fiber reinforced laminated composite multiple-core sandwich plates

Selvaraj¹,

Maneengam

Margabandu³

2022

Composite Structures

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Study of natural frequencies of natural rubber cored novel sandwich structure without tip mass

Cited by 9 publications

References 6 publications

Evaluation of crack locations in beam using artificial neural network‐based modified curvature damage index

Evaluation of crack locations in beam using artificial neural network‐based modified curvature damage index

Influence of tool pin profiles on waviness and natural frequency during friction stir welding of Al-Li alloys plates

Characterization of mechanical and dynamic properties of natural fiber reinforced laminated composite multiple-core sandwich plates

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