Biomimicking and evaluation of dragonfly wing morphology with polypropylene nanocomposites

Khare, Vivek; Kamle, Sudhir

doi:10.1007/s10409-022-21431-2

Cited by 8 publications

(3 citation statements)

References 39 publications

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“…MAV flapping wings are prone to wind induced deformations as reported in our earlier studies. 12,13 We studied earlier that nanocomposites can mimic the natural wings in terms of the wing material properties and the flapping performance. We considered the motion of our nanocomposite flapping wing inspired by hummingbird as shown in Figure 9.…”

Section: Mav Flapping Wingmentioning

confidence: 99%

DIC system with Euler transformation for structural measurements in wind tunnel

Khare

Kamle

Kwok

2023

Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2023

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In the wind tunnel testing, structural deformation and motion should be measured using non-contact and precisely calibrated techniques. We designed, developed, and set up a novel DIC method for testing large and lightweight structures in wind tunnel. With the use of a universal mount mechanism and optical advancements for far-field structural evaluations, we increased the functionality of our current in-house stereo DIC system. The pitch and azimuth rotations of cameras are taken into consideration during the calibration of the WT-DIC system utilizing the Euler rotation theorem. Case studies for the developed DIC system include a small MAV flapping wing and a large deployable parachute.

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Section: Mav Flapping Wingmentioning

confidence: 99%

DIC system with Euler transformation for structural measurements in wind tunnel

Khare

Kamle

Kwok

2023

Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2023

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“…This can include strips of tape or lines [17,43]; markers on the roots, tips [34] and/or the spars [30,55]; and colored or reflective markers [48,54]. Alternatively, systems use a coating on the entire wing to allow the full motion of the wing to be observed in imagery, such as in [69,70]. A stroboscope can also be used to enhance the detection of the kinematics of the system as is used in [24], or other markers can be used as in [29,39,42].…”

Section: High-speed Cameramentioning

confidence: 99%

“…This can include laser displacement sensors to measure the wing position [69,70] or the position of fixed points in the system such as a slider or the actuator itself [42,44,71], which can also be measured using infra-red [64]. Alternatively, particle image velocimetry can be used to measure the airflow over the wing [73] or a motion capture system to record the motion of aspects of the system during flight [74].…”

Section: Optical Sensingmentioning

confidence: 99%

A Bibliometric Analysis of Flapping Wing Instrumentation

Lefik,

Marian,

Chahl

2023

Aerospace

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There are flapping wing-style systems being developed by various institutions around the world. However, despite there being many systems that superficially appear robust, there is no viable flapping wing flying system at this time. We identified a gap in knowledge and capability, which is that the lack of appropriate instrumentation seems to be a major roadblock in further developing flapping wing flying systems. There is no complete solution in regards to instrumentation and sensing at the appropriate scales. This paper seeks to critically examine and classify the existing instrumentation utilized and reported in the literature and attempts to identify the path forward for flapping wing-style instrumentation.

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Mechanical Behaviors of Orthogonal Spiral Metal Skeleton–Polyurethane Elastomer Composites under Complex Loading Modes

Xue,

Ye,

Liu

et al. 2024

Adv Eng Mater

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Herein, a novel material design strategy is proposed: an interpenetrating composite composed of a woven orthogonal spiral metal skeleton and polyurethane (PU) elastomer. This interpenetrating composite combines rigidity and flexibility, exhibiting excellent elasticity and deformation recovery. The deformation behavior and mechanical properties of the composites under various loading conditions are investigated through experiments and numerical simulations. Different degrees of warping behaviors occur in composites with various structural parameters under uniaxial tension. Alternating rotations and double spiral arrangements can significantly limit the warping phenomenon, with a maximum reduction of 78%. The bending load capacity is regularly increased by increasing the wire diameter and decreasing the pitch. Increasing the number of loaded spiral wires enhances the bending load capacity of the composites. Uniaxial compression tests demonstrate that the composites have excellent load‐carrying capacity and strain recovery, with compressive strength 1.5 times that of pure PU. Cyclic compression tests further illustrate the excellent energy consumption capacity and stability of the composites. Overall, the introduction of orthogonal spiral skeletons into the composites demonstrates the potential to achieve enhanced load‐carrying capacity and large strain recovery simultaneously.

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Biomimicking and evaluation of dragonfly wing morphology with polypropylene nanocomposites

Cited by 8 publications

References 39 publications

DIC system with Euler transformation for structural measurements in wind tunnel

DIC system with Euler transformation for structural measurements in wind tunnel

A Bibliometric Analysis of Flapping Wing Instrumentation

Mechanical Behaviors of Orthogonal Spiral Metal Skeleton–Polyurethane Elastomer Composites under Complex Loading Modes

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