Identification by modal analysis of composite structures modelled with FSDT and HSDT laminated shell finite elements

Botsis, J.; Gmür, Thomas; Schorderet, Alain

doi:10.1016/j.compositesa.2004.01.014

Cited by 33 publications

(20 citation statements)

References 12 publications

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“…A relative comparison for a specific element with time, loading, or exposure may be sufficient to find indications of a defect, or of a change in the behavior of the structure due to aging effects. Comparison with finite element calculations is one approach for quantitative evaluation (55). Research on monitoring of PMC elements or structures also investigated the use of piezoelectric sensors for detection of delaminations by external excitation (56), and this approach is also discussed in Ref.…”

Section: Mechanical Test Methodsmentioning

confidence: 99%

Nondestructive Testing of Polymers and Polymer–Matrix Composites

Brunner

Hack

Neuenschwander

2015

Encyclopedia of Polymer Science and Technology

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Because of their unique properties, polymers and polymer–matrix composites pose both challenges and opportunities for nondestructive testing. The increasing use of these materials creates a demand for nondestructive verification of various properties or specifications, determination of structural integrity, or prediction of service‐life. On the other hand, development of new nondestructive test methods, improved sensitivity, or faster data acquisition and analysis may allow for nondestructive testing applications that hitherto did not seem feasible or economical. This article provides a brief overview of established methods and emerging applications in nondestructive testing of polymers and polymer–matrix composites.

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Section: Mechanical Test Methodsmentioning

confidence: 99%

Nondestructive Testing of Polymers and Polymer–Matrix Composites

Brunner

Hack

Neuenschwander

2015

Encyclopedia of Polymer Science and Technology

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“…In these refined models, it is assumed that the displacements are of a higher-order polynomial form, which allows non-linear variations of the displacements and stresses through the thickness. The variable p-order shear deformation theory (PSDT) [5,12,13] follows the same idea than the higher-order approach, but the formulation is based on a through-the-thickness displacement approximation of variable order p with a full 3D orthotropic constitutive law. In this model, the needs in accuracy and/or computation time can be adjusted by varying the degree of approximation.…”

Section: Introductionmentioning

confidence: 99%

Modal validation of sandwich shell finite elements based on a p‐order shear deformation theory including zigzag terms

Sulmoni

Gmür

Botsis

et al. 2008

Numerical Meth Engineering

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SUMMARYThis paper describes a set of improved C 0 -compatible composite shell finite elements for evaluating the global dynamic response (natural frequencies and mode shapes) of sandwich structures. Combining a through-the-thickness displacement approximation of variable high order with a first-order zigzag function, the proposed finite elements are suited for modelling sandwich plates and doubly curved shells with a non-uniform thickness and are more accurate than conventional models based on the first-and third-order shear deformation theories, especially in sandwich panels with highly heterogeneous properties. The new finite element model is then validated by a comparison with the standard shell and 3D solid models. From these investigations, it can be concluded that adding a zigzag function even to high-order polynomial approximations of the through-the-thickness displacement is a useful tool for refining the modelling of sandwich structures. In addition, the proposed formulation is sufficiently versatile to represent with the same level of accuracy the behaviour of thin-to-thick laminated shells as well as of strongly heterogeneous sandwich structures.

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“…The dynamic responses of thick multi-layered composite flat/curved panel and sandwich plate are reported using the new HSDT [5,6] kinematic model. Further, Cugnoni et al [7] computed the experimental modal test of Glass/Polypropylene composite plate and validated by comparing them with numerical results of the thin and the thick layered composite shell panel computed via FSDT as well as the HSDT kinematic models.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of vibration and transient behaviour of laminated composite curved shallow shell structure: an experimental validation

et al. 2017

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The natural frequency and the transient responses of Carbon/Epoxy layered composite plate structure have been analysed with the help of two higher-order mid-plane kinematics models in this article. The mathematical formulation of the layered composite structure is further utilised to develop a computer programme in MATLAB-15.0, to evaluate the said responses.The practical relevance of the present higher-order models has been established via comparing the present numerical results computed using suitable MATLAB computer code with the in-house experimental test data. Additionally, the fundamental frequency and the transient responses of the carbon fibre reinforced epoxy composite plate structure are simulated via finite element package (ANSYS) with the help of ANSYS parametric design language (APDL) code. The simulated frequencies are compared with those of the present experimental and MATLAB results. Finally, the significance of the proposed higher-order kinematics has been established via solving a different kind of illustrations to investigate the influence of various geometrical and material parameter on the dynamic responses of layered composite structure and discussed in detail.

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Identification by modal analysis of composite structures modelled with FSDT and HSDT laminated shell finite elements

Cited by 33 publications

References 12 publications

Nondestructive Testing of Polymers and Polymer–Matrix Composites

Nondestructive Testing of Polymers and Polymer–Matrix Composites

Modal validation of sandwich shell finite elements based on a p‐order shear deformation theory including zigzag terms

Numerical analysis of vibration and transient behaviour of laminated composite curved shallow shell structure: an experimental validation

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