Deformation Measurement of a Birdlike Airfoil with Optical Flow and Numerical Simulation

Gong, Xiaoliang; Bansmer, Stephan; Strobach, Christoph; Unger, Ralf; Haupt, Matthias

doi:10.2514/1.j052910

Cited by 7 publications

(2 citation statements)

References 28 publications

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“…The displacement field resulting from applying this technique has subpixel resolution, usually with values less than 1 pixel. Gong and Bansmer [22] have used the optical flow technique and the image correlation to measure the deformation of a birdlike aerofoil. The results show a higher spatial resolution compared to the image correlation technique.…”

Section: Introductionmentioning

confidence: 99%

Investigation of solidification cracking susceptibility during laser beam welding using an in-situ observation technique

Bakir

Gumenyuk

Rethmeier

2018

Science and Technology of Welding and Joining

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In recent years, laser beam welding has found wide applications in many industrial fields. Solidification cracks are one of the most frequently encountered welding defects that hinder obtaining a safe weld joint. Decades of research have shown that one of the main causes of such cracks are the strain and the strain rate. Obtaining meaningful measurements of these strains has always been a major challenge for scientists, because of the specific environment of the measurement range and the many obstacles, as well as the high temperature and the plasma plume. In this study, a special experimental setup with a high-speed camera was employed to measure the strain during the welding process. The hot cracking susceptibility was investigated for 1.4301 stainless steel, and the critical strain required for solidification crack formation was locally and globally determined.

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Section: Introductionmentioning

confidence: 99%

Investigation of solidification cracking susceptibility during laser beam welding using an in-situ observation technique

Bakir

Gumenyuk

Rethmeier

2018

Science and Technology of Welding and Joining

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“…It is found that the post flutter response is a limit-cycle oscillation [17]. An experimental method and numerical technique are developed to apprehend the transient response of multilayer composite rotating airfoil under a slicing-impact loading and birdlike struck is investigated [18,19] Flutter instability can be used to harvest energy for small electric devises. The wing parameters are chosen so that it is becomes instable with respect to flutter instability.…”

Section: Introductionmentioning

confidence: 99%

Stability of Turbine Blades, Aircraft Wings and Their Acoustic Radiation

Hamadiche¹

2015

Journal of Thermal Engineering

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The stability of the wing is revisited in this work, the natural modes of the thin wing in incidence under the action of aerodynamic forces are calculated. The wing in this study has two degrees of freedom corresponding to the bending and torsion. Boundary between stable and instable zone are calculated. Wing stabilization by piezoelectric material are considered. The noise level produced by unsteady impinging gust is predicted.

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Development of a novel optical measurement technique to investigate the hot cracking susceptibility during laser beam welding

et al. 2018

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Deformation Measurement of a Birdlike Airfoil with Optical Flow and Numerical Simulation

Cited by 7 publications

References 28 publications

Investigation of solidification cracking susceptibility during laser beam welding using an in-situ observation technique

Investigation of solidification cracking susceptibility during laser beam welding using an in-situ observation technique

Stability of Turbine Blades, Aircraft Wings and Their Acoustic Radiation

Development of a novel optical measurement technique to investigate the hot cracking susceptibility during laser beam welding

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