Seminar Mechanics of Machines and Mechanisms - Models and Mathematical Methods

PROGRAM

Predavanja možete pratiti i online putem MITEAM stranice Seminara Mehanika mašina i mehanizama - modeli i matematičke metode: https://miteam.mi.sanu.ac.rs/asset/PgqjStRApvcGxwtBx

Plan rada Seminara Mehanika mašina i mehanizama - modeli i matematičke metode za MAJ 2025.

Ponedeljak, 05.05.2025. u 18:00, sala 301f, Kneza Mihaila 36 i Live stream
Milica Milić, Faculty of Mechanical Engineering, University of Belgrade
MULTIDISCIPLINARY APPROACH TO THE OPTIMIZATION AND FAILURE PREDICTION OF AEROSPACE COMPOSITE STRUCTURES SUBJECTED TO COMPLEX LOADING
Composite materials have been increasingly used in the aerospace industry for designing primary aircraft structures in recent years. The application of new materials allows for significant weight savings while improving the mechanical characteristics of the structures. This is also very important in the development of unmanned aerial vehicles (UAVs), given that their small size compared to commercial aircraft limits the application of propulsion, subsystem components, and systems. During the design phases, it is necessary to consider all aspects important for the construction and examine different load cases, it requires more detailed strength analyses. The failure of any primary structural element can affect the movement of the UAV during a mission or lead to crash landings and significant losses. This lecture will present research conducted on the failure analysis of a composite beam in a new UAV. During the testing phase, under conditions of unpredictable loading followed by impact landings, structural failure of the beam occurred. The research follows the development of a methodology for approximating impact loads or complex spatial loads to a planar system of static forces, then experimentally validated numerical calculations (using the numerical tool Ansys APDL and standard material sample tensile testing procedures). Subsequently, the integration of numerical calculations with the optimization process using a genetic algorithm aims to obtain the optimal structure for global laminate stacking and geometric redesign. Finally, the main goal of the methodology is to develop a tool for predicting the behavior of composite structures under complex loading conditions. This tool was developed using artificial neural networks and integrated with an optimization function formed using a genetic algorithm. The tool was validated by numerical calculation using the finite element method (FEM), and a very good correlation between the predicted and numerical results was achieved.

Seminar Mehanika mašina i mehanizama - modeli i matematičke metode započeo je sa radom u junu 2018.god. Seminar se održava do dva puta mesečno, utorkom u periodu od 17.00 - 19.00 u Matematičkom institutu SANU.