Modeling and Simulation of Thermomechanical Behavior of Shape Memory Alloys

Shape Memory Alloys (SMAs) are genuine materials for shape memory materials which can return to their original shape with phase change at high temperatures in case they subject to large deformations.Because they have a genuine constitution, SMAs are particularly used in high technology applications such as aerospace and biomedical applications. We aim to model coupled thermo-mechanical behaviours of shape memory alloys using large deformation theory of continuum media. NASA (National Aeronautics and Space Administration) is a leading institution having vast test data on modeling SMAs. At the final phase of project, validation and verification of the model will be conducted by the provided experimental data from NASA. 

Numerical Modeling and Simulation of Heat-Resistant Coatings

This project addresses the major aspects of mathematical modeling and development of computational procedures for the thermo-mechanical structural design of high-temperature coating systems for advanced turbine technology. The research is aimed at modeling and predicting the performance and durability of coating systems.

Oxidation of bond coat in high temperatures is considered to be an important phenomena effecting coating durability of the blade in service. Phase field transformation for thermally grown oxide and oxygen diffusion at bondcoat-ceramic interface is simulated using novel techniques and computational models. Damage of model as a result of residual stresses will be also computed and visualized as a final step.

​Numerical Modeling and Simulation of TBC Systems 

The project we are working currently on, is carried out in cooperation with TAI (Turkish Aerospace Industry) and TEI (TUSAS Engine Industries). Project aims numerical simulation of Thermal barrier coatings (TBCs) used in gas turbine blades working in elevated temperatures. Different failure mechanism are involved in failure process of TBCs and sophisticated models are used to simulate this process. 

Design of a Warm/Hot Electromagnetic Forming System for the Forming of Brittle Sheet Metals 

In this project, an electromagnetic forming system will be designed and constructed and also the effectiveness of the system will be evaluated. To ensure the formability of sheet metal, pre-heating will be applied by the electromagnetic induction method, then the material reaching a certain temperature will be shaped by means of passing a high frequency current. Moreover, in the project, the design of an appropriate die and a coil will be studied in the light of novel numerical methods and analysis techniques. In this project, aluminum 7XXX series, a material widely used especially in the defense industry, is selected as the brittle material to be formed, however this choice is an application requirement and the method to be developed will be applicable to other brittle materials like Armox armor steel and magnesium.