Behavior of composite laminates with embedded delaminations

Kharghani, N.; Soares, C. Guedes

doi:10.1016/j.compstruct.2016.04.042

Cited by 57 publications

(13 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Where A, B, C and D are frequency coefficients and depends upon the boundary conditions applied and are determined from the equations (13,14) in case of simply supported plate.…”

Section: Analytical Analysismentioning

confidence: 99%

“…These are preferred because of the advantages that have such as superior mechanical characteristics, high-strength, their stiffness ratio to weight is excellent. One of the crucial parameter in composite laminates is delamination that are generated accidentally either during service period or during manufacturing of the composites [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental, Numerical and Finite Element Vibration Analysis of Delaminated Composite Plate

2019

View full text Add to dashboard Cite

The vibration of the delaminated composites concerns the structure safety and dynamic behavior of the composite structures as it can be vital in the presence of delamination. In this research paper, the finite element simulations, analytical simulations and the experimental work are combined to analyze the vibration behavior at different delamination size, different stacking sequences and different boundary conditions. The finite element analysis software packages like Ansy and Abqus are used to fetch the vibration response of carbon fiber reinforced polymer composite plate for different boundary conditions, stacking sequences and delamination sizes. Rayleigh-Ritz method was used to derive the governing equations to find the natural frequencies and the results were computed using Matlab tool. It is seen that the natural frequencies of carbon fiber reinforced polymer decreased with an increase in delamination size subjected to all boundary conditions. The higher values of natural frequencies found for all sides clamped boundary conditions. Stacking sequence of (0/90/45/90) showed higher values of natural frequencies subjected to all-sided clamped boundary conditions. Results from this analysis can be considered as a base point for the safe, reliable design of composite structures with and without delamination.

show abstract

“…Where A, B, C and D are frequency coefficients and depends upon the boundary conditions applied and are determined from the equations (13,14) in case of simply supported plate.…”

Section: Analytical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental, Numerical and Finite Element Vibration Analysis of Delaminated Composite Plate

2019

View full text Add to dashboard Cite

show abstract

“…u0, ν 0, and w0 are the mid-plane displacements along x, y, and z directions, respectively on the xy-plane [53]. z is the vertical distance from the mid-plane to the k th layer which is located between z = hk and z= hk+1 through laminate thickness, as shown in Fig.2.…”

Section: Mathematical Modellingmentioning

confidence: 99%

A novel explicit solution for twisting control of smart laminated cantilever composite plates/beams using inclined piezoelectric actuators

Gohari

Sharifi

Vrcelj

2017

Composite Structures

View full text Add to dashboard Cite

In the present work, a novel explicit solution is proposed for obtaining twisting deformation and optimal shape control of smart laminated cantilever composite plates/beams using inclined piezoelectric actuators. The linear piezoelectricity and plate theories were adapted for the analysis. A novel double integral multivariable Fourier transformation method and discretised higher order partial differential unit step function equations were employed. For the first time, an exact solution is developed to analyse electro-mechanical twisting moments in smart composite structures. Since there are no published benchmark results for verification, a series of simple, accurate and robust finite element (FE) analysis models and realistic electro-mechanical coupled FE procedures are developed for the effective prediction of the structural behaviour of the smart laminated piezo-composite structures under arbitrary loads. In addition to the novelty of the explicit solution, more comprehensive FE simulations of smart structures and step-by-step guidelines are discussed. The effect of various parameters including electro-mechanical twisting coupling, layup thickness, actuators size, placement, and inclination angle, electrical voltage, stacking sequence, and geometrical dimension was taken into account. The comparison of results showed an excellent agreement. Unlike the earlier studies, the proposed method does not require the characteristic and trial deflection function to be predetermined.

show abstract

“…Three‐dimensional (3D) solid elements or layerwise theories (LWTs) have been used for analysis of delaminated composite structures, in which the delaminations are modeled directly as unconnected nodes and through discontinuity functions in the displacement field respectively. The 3D methods yield accurate results but often lead to too large problem size and long solution time to be used for practical design of plate and shell‐type structures, as the number of degrees of freedom (DOFs) increases proportionately with the number of layers in the laminate.…”

Section: Introductionmentioning

confidence: 99%

“…1 To assess the severity of the delamination damage as well as to develop model-based techniques for structural health monitoring, 2,3 modeling of delaminations in laminated structures has received great attention beginning with the work of Ramkumar et al 4 Comprehensive reviews on these studies are available in the works of Tay 5 and Della and Shu. 6 Three-dimensional (3D) solid elements [7][8][9] or layerwise theories (LWTs) [10][11][12][13] have been used for analysis of delaminated composite structures, in which the delaminations are modeled directly as unconnected nodes and through discontinuity functions in the displacement field respectively. The 3D methods yield accurate results but often lead to too large problem size and long solution time to be used for practical design of plate and shell-type structures, as the number of degrees of freedom (DOFs) increases proportionately with the number of layers in the laminate.…”

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

View full text Add to dashboard Cite

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.

show abstract

Behavior of composite laminates with embedded delaminations

Cited by 57 publications

References 21 publications

Experimental, Numerical and Finite Element Vibration Analysis of Delaminated Composite Plate

Experimental, Numerical and Finite Element Vibration Analysis of Delaminated Composite Plate

A novel explicit solution for twisting control of smart laminated cantilever composite plates/beams using inclined piezoelectric actuators

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

Contact Info

Product

Resources

About