Characterization of Modified Star Shape Cross-Sectional Beam Configurations with Rotorcraft Applications

Ha, Kwangtae; Dancila, Dragos

doi:10.2514/6.2003-1865

Cited by 3 publications

(2 citation statements)

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“…Figure 1 shows possible redistributions of a circular cross sectional material to star configuration section and a representative flexible torsion bar with three arcs. From Equations 1 to 3, Figures 2 and 3 are obtained visually, which show that the transition improves the performance [8]. That is, it is possible to achieve a beneficial stiffness decreases in torsional stiffness and an increase in bending stiffness while keeping the axial stiffness unchanged.…”

Section: Characteristic Of Flexible Trailing Edge Flap Systemmentioning

confidence: 99%

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Innovative Blade Trailing Edge Flap Design Concept using Flexible Torsion Bar and Worm Drive

2020

HighTech. Innov. J.

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In this paper, a simple but effective trailing edge flap system was proposed. This preliminary concept uses a more practical and stable actuation system which consists of a motor-driven worm gear drive and flexible torsion bar. The flexible torsion bar is designed to be easily twisted while keeping bending rigidity as a sup-port and the worm gear drive not only provides a high torque to overcome aero-dynamic forces on the flap area and the torsional rigidity of the support bar, but also acts as a brake to avoid instability due to the high torsional flexibility of sup-port bar. A preliminary level design study was performed to show the applicability of the new trailing edge flap system for wind turbine rotor blade or helicopter blade.

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Section: Characteristic Of Flexible Trailing Edge Flap Systemmentioning

confidence: 99%

“…Ha and Dancila [8] proposed and analyzed a star-shaped composite cross section which optimizes the extensiontwist response. Composite star beams are ideal solution for the frictionless tension-torsion hinge bar support of the rotor blade tip against centrifugal forces.…”

Section: Introductionmentioning

confidence: 99%

Innovative Blade Trailing Edge Flap Design Concept using Flexible Torsion Bar and Worm Drive

2020

HighTech. Innov. J.

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Preliminary Study on Blade Trailing Edge Flap System Using Flexible Torsion Bar and Worm Drive

2020

EKC 2019 Conference Proceedings

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Composite Star-Beams as Pitch Compliant Tension-Torsion Support Mechanism for Active Windmill Blade Tips

Dancila¹,

Cline

Goss

et al. 2010

51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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Characterization of Modified Star Shape Cross-Sectional Beam Configurations with Rotorcraft Applications

Cited by 3 publications

References 1 publication

Innovative Blade Trailing Edge Flap Design Concept using Flexible Torsion Bar and Worm Drive

Innovative Blade Trailing Edge Flap Design Concept using Flexible Torsion Bar and Worm Drive

Preliminary Study on Blade Trailing Edge Flap System Using Flexible Torsion Bar and Worm Drive

Composite Star-Beams as Pitch Compliant Tension-Torsion Support Mechanism for Active Windmill Blade Tips

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