Flutter Control of Aircraft Wing using Auxetic Structures: Numerical Investigation

Flutter Control of Aircraft Wing using Auxetic Structures: Numerical Investigation | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Flutter Control of Aircraft Wing using Auxetic Structures: Numerical Investigation M Rudresh, K P Prashanth, Praveen Kumar M V, M Ravikumar, S. Sivambika This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5335418/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Aircraft Flutter is one of the significant concerns in achieving the required performance. These undesirable vibrations arising from interaction of aerodynamic and structural loads can be destructive. Trailing-edge wing morphing is one of the effective ways to tackle flutter. This work has been solely carried out to emphasis the concept of using integrated compliant mechanisms in the airfoil, being much efficient than using tradition wings, which is made up of flaps, ailerons separately which can cause problems like aileron reversal, etc. Re-entrant auxetic structures being one of the meta-materials, with negative Poisson's ratio to enable an effortless morphing mechanism as it has high flexibility along in-plane direction (chord-wise), at the same time combining with its torsional bending stiffness in out-of-plane direction (span-wise) results in finite weight reduction and delay in flutter, thereby increasing the flight performance characteristics. The 3D CAD Models were designed and numerical analysis is carried out. Modal analysis was done to compute the Eigen-frequencies of the Auxetic wing. Then, air-pressure was generated using CFD analysis. Finally, the fluid-structure interaction was done by importing the air-pressure and performing harmonic analysis. About 14.5% increase in resonant frequency was observed when Auxetic Structure was used also by reducing weight. This strongly indicates that, the Auxetic Wing is capable of withstanding higher frequencies before failure than regular wing, which can be used to delay flutter. This implies that the Auxetic Structure has the potential to be used as a structure with a passive morphing airfoil. Auxetic Structures Flutter Wing Harmonic Analysis Modal Analysis Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-5335418","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":380957406,"identity":"ca5dc6d2-d33b-4ae1-aba5-813b5f6669e9","order_by":0,"name":"M Rudresh","email":"data:image/png;base64,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","orcid":"","institution":"Dayananda Sagar College of Engineering","correspondingAuthor":true,"prefix":"","firstName":"M","middleName":"","lastName":"Rudresh","suffix":""},{"id":380957407,"identity":"a706b1bb-62fc-499b-8fa8-5e75bedb2497","order_by":1,"name":"K P Prashanth","email":"","orcid":"","institution":"Acharya Institute of Technology","correspondingAuthor":false,"prefix":"","firstName":"K","middleName":"P","lastName":"Prashanth","suffix":""},{"id":380957408,"identity":"1036c188-1100-4166-b1ca-d5d2d27d4866","order_by":2,"name":"Praveen Kumar M V","email":"","orcid":"","institution":"GITAM Deemed to be University","correspondingAuthor":false,"prefix":"","firstName":"Praveen","middleName":"Kumar M","lastName":"V","suffix":""},{"id":380957409,"identity":"d6eff56d-0a1e-482e-91a3-f49ef014249a","order_by":3,"name":"M Ravikumar","email":"","orcid":"","institution":"BMS College of Engineering","correspondingAuthor":false,"prefix":"","firstName":"M","middleName":"","lastName":"Ravikumar","suffix":""},{"id":380957410,"identity":"390c4282-06da-451d-ad53-aec25eddcf5c","order_by":4,"name":"S. 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These undesirable vibrations arising from interaction of aerodynamic and structural loads can be destructive. Trailing-edge wing morphing is one of the effective ways to tackle flutter. This work has been solely carried out to emphasis the concept of using integrated compliant mechanisms in the airfoil, being much efficient than using tradition wings, which is made up of flaps, ailerons separately which can cause problems like aileron reversal, etc. Re-entrant auxetic structures being one of the meta-materials, with negative Poisson's ratio to enable an effortless morphing mechanism as it has high flexibility along in-plane direction (chord-wise), at the same time combining with its torsional bending stiffness in out-of-plane direction (span-wise) results in finite weight reduction and delay in flutter, thereby increasing the flight performance characteristics. The 3D CAD Models were designed and numerical analysis is carried out. Modal analysis was done to compute the Eigen-frequencies of the Auxetic wing. Then, air-pressure was generated using CFD analysis. Finally, the fluid-structure interaction was done by importing the air-pressure and performing harmonic analysis. About 14.5% increase in resonant frequency was observed when Auxetic Structure was used also by reducing weight. This strongly indicates that, the Auxetic Wing is capable of withstanding higher frequencies before failure than regular wing, which can be used to delay flutter. 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