Finite element modeling and effects of material uncertainties in a composite laminate with bend–twist coupling

Murray, Robynne E.; Doman, Darrel A.; Pegg, Michael J.

doi:10.1016/j.compstruct.2014.11.035

Cited by 27 publications

(10 citation statements)

References 34 publications

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“…The plies were arranged with the aid of hand tools, and the fibre' orientation in each ply was confirmed with visual inspections. This process was undertaken as meticulously as possible since accurate positioning of the fibre direction in the plies is of the utmost importance to obtain the intended anisotropic properties in FRP components [28]. Finally, the layup was debulked using vacuum and hand tools after each added ply to minimise voids and imperfections in the cast.…”

Section: Manufacture Of Composite Prototypementioning

confidence: 99%

Experimental Verification of the Elastic Response in a Numeric Model of a Composite Propeller Blade with Bend Twist Deformation

et al. 2021

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Adaptive composite propeller blades showing bend twist behaviour have received increasing interest from hydrodynamic and structural engineers. When exposed to periodic loading conditions, such propellers can be designed to have higher energy efficiency and emit less noise and vibration than conventional propellers. This work describes a method to produce an adaptive composite propeller blade and how a point load experiment can verify the predicted elastic response in the blade. A 600 mm-long hollow full-size blade was built and statically tested in the laboratory. Finite element modelling predicted a pitch angle change under operational load variable loads of 0.55°, a geometric change that notably compensates for the load cases. In the laboratory experiment, the blade was loaded at two points with increasing magnitude. The elastic response was measured with digital image correlation and strain gauges. Model predictions and experimental measurements showed the same deformation patterns, and the twist angle agreed within 0.01 degrees, demonstrating that such propellers can be successfully built and modelled by finite element analysis.

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Section: Manufacture Of Composite Prototypementioning

confidence: 99%

Experimental Verification of the Elastic Response in a Numeric Model of a Composite Propeller Blade with Bend Twist Deformation

et al. 2021

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“…Cui 6 deduced the necessary and sufficient conditions for composite laminates with extension-shear coupling effect which contribute to the bending-twist structures. Murray 7 presented the experimental verification of a composite FEM by static bending tests of 500 mm ×200 mm BT coupled laminate plates, it was found that the bending and twisting response of samples were linear within the range of applied loads and the sensitivity of laminate thickness and accuracy of ply angles. Cuadrado 8 presented a methodology to obtain a physically more accurate model using experimentally measured modal parameters.…”

Section: Introductionmentioning

confidence: 99%

Location effects on bend-twist coupling modes characteristic of the laminate plates

Ying

Wang

2021

Composites and Advanced Materials

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In this paper, the effects of coupling location on the properties of bending-twist modes are proposed. The static test and modal analysis of the composite plates are investigated. Initial coupling effects are first obtained from the static test of the plates. The frequencies, nodal lines, and the mode shapes are then studied experimentally and numerically. A new method is proposed to quantitatively describe the bending-twist coupling performance of laminates using modal assurance criterion. The results show that the coupling location in the middle coupled plates show good coupling effects at lower order vibrations. These results also show that the effect of coupling stiffness. The conclusions can be considered as a reference to analyze the coupling phenomenon of large composite wind turbine blades.

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“…Finite element models (FEMs) are used in the design of composite bend–twist (BT) coupled structures. In [ 17 ], the experimental verification of composite finite element models by static bending tests of bend–twist coupled laminate plates is presented. It has been found that the bending and twisting responses of the structures are linear and within the range of applied loads.…”

Section: Introductionmentioning

confidence: 99%

Influence of Mechanical Couplings on the Dynamical Behavior and Energy Harvesting of a Composite Structure

2020

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In this paper, the dynamical behavior of composite material is analyzed, including the energy harvesting effect. The composite is modeled by the Finite Element Method (FEM) and is made of pre-impregnate with a matrix of thermosetting epoxy resin reinforced with high-strength R-type glass fibers, and it is designed as a beam structure that is exposed to mechanical vibrations. The structure assumed the form of a beam with a substantially rectangular cross section. The couplings of motion occurring between mode shapes at properly selected fiber orientations are investigated. The beams with determined sets of composite layers and a coupling effect are used to recover electricity from the mechanical vibrations in the vicinity of the first resonance zone. The composite with a certain number of fiber glass layers has assumed an orientation relative to the beam axis. The new values found in this paper are the intensity of the coupling between the bending in the stiff and flexible directions of the beam for a chosen fiber layer stacking sequence. Additionally, the influence of layer configuration on the energy harvesting efficiency of the Macro-Fiber Composite (MFC) piezoelectric element is assessed.

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Finite element modeling and effects of material uncertainties in a composite laminate with bend–twist coupling

Cited by 27 publications

References 34 publications

Experimental Verification of the Elastic Response in a Numeric Model of a Composite Propeller Blade with Bend Twist Deformation

Experimental Verification of the Elastic Response in a Numeric Model of a Composite Propeller Blade with Bend Twist Deformation

Location effects on bend-twist coupling modes characteristic of the laminate plates

Influence of Mechanical Couplings on the Dynamical Behavior and Energy Harvesting of a Composite Structure

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