Experimental and numerical analysis of free vibration of delaminated curved panel

Hirwani, Chetan Kumar; Patil, Rahul Kumar; Panda, Sidhartha; Mahapatra, Siba Sankar; Mandal, Sumantra; Srivastava, Lokesh; Buragohain, Manoj Kumar

doi:10.1016/j.ast.2016.05.009

Cited by 65 publications

(18 citation statements)

References 37 publications

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“…With the development of materials science, new glass fiber-reinforced plastics (hereinafter referred to as the "composite"), thanks to their good insulation properties and mechanical properties, have gradually become a substitute material to solve the problem of weak seismic performance of porcelain electrical equipment. In recent years, domestic and foreign scholars have carried out corresponding research on the mechanical properties and seismic performance of composite electrical equipment [11][12][13][14][15][16][17][18][19][20][21][22][23][24]. e representative research is the research on the seismic performance of ±800 kV composite insulators conducted by Cheng et al [12] through the earthquake simulation shaking table test, during which the displacement, strain, and acceleration responses of key parts of the equipment are obtained, and the comparative analysis was conducted for seismic response of the pillar insulators with and without the brackets.…”

Section: Introductionmentioning

confidence: 99%

“…Schiff et al [13] conducted a shaking table test of composite insulators and studied the nonlinear seismic response of composite insulators under seismic loads. Hirwani et al [15] investigated the effect of delamination on the free vibration behaviour of the laminated composite curved panels of different geometries (cylindrical, spherical, elliptical, hyperboloid, and flat). e effect of different materials and geometrical parameters including the size, location, and position of the delamination on the free vibration behaviour of the laminated composite shell panel has been analysed numerically and discussed in detail.…”

Section: Introductionmentioning

confidence: 99%

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Research on Bending Rigidity at Flange Connections of UHV Composite Electrical Equipment

Wang

Cheng

Lü

et al. 2020

Shock and Vibration

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Pillar electrical equipment is an important part of substations. The application of composite materials in pillar equipment can facilitate the improvement of the seismic performance of electrical equipment. In this paper, the test of elastic modulus and bending rigidity was conducted for individual composite elements in insulators and arresters, and the calculation formula for bending rigidity at the composite flange cementing connections was put forward. The numerical simulation model for the earthquake simulation shaking table test of ±1,100 kV composite pillar insulators was established, in which the bending rigidity value for the flange cementing part was obtained by the test or calculation formula. The numerical simulation results were compared with the earthquake simulation shaking table test results, the dynamic characteristics and seismic response of the model were compared, respectively, the validity of the proposed calculation formula for flange bending rigidity of composite cementing parts was verified, and a convenient and effective means was provided for calculating the seismic performance of composite electrical equipment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on Bending Rigidity at Flange Connections of UHV Composite Electrical Equipment

Wang

Cheng

Lü

et al. 2020

Shock and Vibration

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“…Lee and Chung and Noh and Lee have presented FE models based on the TOT using a four‐node nonconforming element for free vibration analysis of shallow composite spherical shell panels containing embedded delaminations. Experimental and numerical results for free vibration response of delaminated cylindrical and spherical panels using a nine‐node shell element based on two versions of TOTs have been presented by Hirwani et al In all the aforementioned studies including those based on the higher‐order theories, the point continuity method is used at the delamination fronts. As stated earlier, this method does not work well in case of higher‐order theories and may yield large inaccuracy for thick laminates and higher vibration modes .…”

Section: Introductionmentioning

confidence: 99%

Delamination modeling in doubly curved laminated shells for free vibration analysis using zigzag theory‐based facet shell element and hybrid continuity method

Kapuria

Ahmed

2019

Numerical Meth Engineering

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Summary We present a finite element (FE) formulation for the free vibration analysis of doubly curved laminated composite and sandwich shells having multiple delaminations, employing a facet shell element based on the efficient third‐order zigzag theory and the region approach of modeling delaminations. The methodology, hitherto not attempted, is general for delaminations occurring at multiple interfacial and spatial locations. A recently developed hybrid method is used for satisfying the continuity of the nonlinear layerwise displacement field at the delamination fronts. The formulation is shown to yield very accurate results with reference to full‐field three‐dimensional FE solutions, for the natural frequencies and mode shapes of delaminated shallow and deep, composite and highly inhomogeneous soft‐core sandwich shells of different geometries and boundary conditions, with a significant computational advantage. The accuracy is sensitive to the continuity method used at the delamination fronts, the usual point continuity method yielding rather poor accuracy, and the proposed hybrid method giving the best accuracy. Such efficient modeling of laminated shells with delamination damage will be of immense use for model‐based techniques for structural health monitoring of laminated shell‐type structures.

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“…Moreover, Hirwani and colleagues [3] examined the effect of delaminations on the free vibration behavior of curved layered composite panels in different geometries. It has also been observed that the position, position and size of the delamination, the geometric and material parameters as well as the laminated curved panel structures greatly influence the frequency response.…”

Section: Introductionmentioning

confidence: 99%

Vibration Analysis of Layered Composite Beam with Variable Section in Terms of Delamination and Orientation Angle in Analytical and Numerical Methods

Atlıhan

Ergene

2018

Acta Phys. Pol. A

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In this study, vibration analysis of layered composite beams with variable cross sections and delaminations was investigated analytically and numerically. In the analytical part, Bernoulli beam theory was used and the effect of shear force on the beam was neglected. The layered composite beam consists of eight layers and contains delaminations with various sizes. In the numerical part of the study, ansys program package was used for finite element analysis. Layered composite beams with the same geometry were created in the finite element model. In the numerical part, the contact element was also defined between the delaminated parts. Furthermore, it has been shown numerically and analytically that the slope angle of the beam influences the vibration of the layered composite beam. Moreover, as the delamination between the beams increases, the vibration of the beam is observed to decrease. The layered composite beam is shown in graphical form in which the vibration can be changed without changing the geometry of the beam, showing that the vibration can be changed by changing the fiber orientation angle.

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Experimental and numerical analysis of free vibration of delaminated curved panel

Cited by 65 publications

References 37 publications

Research on Bending Rigidity at Flange Connections of UHV Composite Electrical Equipment

Research on Bending Rigidity at Flange Connections of UHV Composite Electrical Equipment

Delamination modeling in doubly curved laminated shells for free vibration analysis using zigzag theory‐based facet shell element and hybrid continuity method

Vibration Analysis of Layered Composite Beam with Variable Section in Terms of Delamination and Orientation Angle in Analytical and Numerical Methods

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