Prediction of material coupling effect on structural damping of composite beams and blades

Chortis, Dimitris I.; Varelis, Dimitris; Saravanos, Dimitris A.

doi:10.1016/j.compstruct.2011.12.004

Cited by 17 publications

(10 citation statements)

References 24 publications

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“…14 showed that the off-axis damping ratios of the UD-GFR/E laminates were increased with increasing the offaxis angle up to 45°then slightly decreased up to 90°off-axis angle. Similar behavior was reported by some researchers [18,35,36] for different unidirectional composite materials. Therefore, the presence of ±45°layers is very important for enhancing the damping properties of the composite laminates, which is characterized by the highest decay response of free vibration curves and maximum damping rations compared with the other investigated materials as shown in Fig.…”

Section: Off-axis Vibration Propertiessupporting

confidence: 87%

Toughness, flexural, damping and interfacial properties of hybridized GFRE composites with MWCNTs

Khashaba

2015

Composites Part A: Applied Science and Manufacturing

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Section: Off-axis Vibration Propertiessupporting

confidence: 87%

Toughness, flexural, damping and interfacial properties of hybridized GFRE composites with MWCNTs

Khashaba

2015

Composites Part A: Applied Science and Manufacturing

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“…In the layup of composite shafts, the sequence, quantity and orientation of the plies influence the mechanical properties of the laminate and, therefore, the dynamic behavior of the rotor. In this section, simulation results demonstrate these influences [42].…”

Section: Influence Of the Layup On The Mechanical Properties Of Compomentioning

confidence: 89%

The dynamic analysis of rotors mounted on composite shafts with internal damping

Mendonça

Medeiros

Pereira

et al. 2017

Composite Structures

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This paper presents a study on the dynamic analysis of rotors mounted on composite shafts. The dynamic analysis of these rotors differs from conventional analysis due to the existence of internal damping in the shaft. The shafts are made of composite materials, which exhibit viscoelastic behavior. The equations of motion for these rotors represent the influence of internal damping on the dynamic behavior of the rotor system. Composite materials can be manufactured using different layups. This study reviews the methodology that can be used to predict the equivalent mechanical properties of composite shafts. Several finite element simulations are presented to show the influence of the composite shaft layup on the dynamic behavior of the rotor. The simulation results are used to present the influence of the layup on Campbell diagrams, critical speeds, instability thresholds and frequency response functions.

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“…By using modelling method which employed hybrid deformation variables, Yoo [11] made modal analysis of the rotational pre-twisted blades by modelling method. Chortis [12] investigated the modal frequencies and damping of the beams and blades which were affected by stiffness and damping. Yang [13] established a shaft-diskblades model and the blades were simplified as beams.…”

Section: Introductionmentioning

confidence: 99%

Transient Response of High Dimensional Nonlinear Dynamic System for a Rotating Cantilever Twisted Plate

Hao

Zhang

et al. 2020

AAMM

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Dynamic transient responses of rotating twisted plate under the air-blast loading and step loading respectively considering the geometric nonlinear relationships are investigated using classical shallow shell theory. By applying energy principle, a novel high dimensional nonlinear dynamic system of the rotating cantilever twisted plate is derived for the first time. The use of variable mode functions by polynomial functions according to the twist angles and geometric of the plate makes it more accurate to describe the dynamic system than that using the classic cantilever beam functions and the free-free beam functions. The comparison researches are carried out between the present results and other literatures to validate present model, formulation and computer process. Equations of motion describing the transient high dimensional nonlinear dynamic response are reduced to a four degree of freedom dynamic system which expressed by out-plane displacement. The effects of twisted angle, stagger angle, rotation speed, load intensity and viscous damping on nonlinear dynamic transient responses of the twisted plate have been investigated. It's important to note that although the homogeneous and isotropic material is applied here, it might be helpful for laminated composite, functionally graded material as long as the equivalent material parameters are obtained.

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Prediction of material coupling effect on structural damping of composite beams and blades

Cited by 17 publications

References 24 publications

Toughness, flexural, damping and interfacial properties of hybridized GFRE composites with MWCNTs

Toughness, flexural, damping and interfacial properties of hybridized GFRE composites with MWCNTs

The dynamic analysis of rotors mounted on composite shafts with internal damping

Transient Response of High Dimensional Nonlinear Dynamic System for a Rotating Cantilever Twisted Plate

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