چکیده مقاله
Auxetic metamaterials have a negative Poisson's ratio NRP , and this irregularity makes them suitable for numerous engineering applications, such as enhancement in indentation resistance and energy absorption The Poisson's ratio of re entrant auxetic structures is highly strain dependent, and it can remain negative exclusively over a specific strain range In re entrant hexagonal cells, the Poisson's ratio increases with strain, surpasses zero, and becomes positive, which exterminates the auxetic characteristics of the structure This study proposes a parametric analysis based on the structure geometry and performs a multi objective optimization based on the auxeticity range and Poisson's ratio A design of experiment DOE was carried out using the Taguchi method to find an empirical relation between Poisson's ratio and strain The finite element method FEM was deployed to investigate the mechanical response of re entrant structures to tensile loading Using a statistical analysis, geometrical parameters were ranked based on their influence on Poisson's ratio The empirical relation between the geometrical parameters, Poisson's ratio, and the auxeticity range was obtained to achieve the best geometrical configuration of the re entrant structure using a genetic algorithm optimization Finally, the best combination of geometrical parameters to increase the negative Poisson's ratio and extend the auxeticity region was represented
کلیدواژهها
نویسندگان
Ramin Delir Nazarlou
Department of Mechanical Engineering, College of Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran
Ali Behbahani
Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran
Behzad Nemati Akhgar
Mining Engineering Department, Engineering Faculty, Urmia University, P.O. Box ۵۷۵۶۱/۵۱۸۱۸ Urmia, Iran
Amir Nourani
Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran
Sharif Shabani
Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran
Faraz Omidbakhsh
Department of Mechanical Engineering, College of Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran
شیوه ارجاع
Behbahani, Ali and Nourani, Amir and Shabani, Sharif,1400,Parametric Analysis and Optimization of Auxeticity Range in Re-Entrant Hexagonal Structures,8th International Conference on Mechanics, Construction, Industries and Civil Engineering
ارائهشده در
مجموعه مقالات هشتمین کنفرانس بین المللی مکانیک، ساخت، صنایع و مهندسی عمران31 مرداد 1400