Dr. A. (Amir) Feyezioghani

Profile

Currently, I am a postdoctoral researcher in Computational Mechanics group of 3MD department at TU Delft. I have a Ph.D. in computational mechanics from Hasselt Univerity, Belgium and an M.Sc. in structural engineering from Tarbiat Modares University, Iran.

Research Focus

I am focusing on modelling simultaneous corrosion and fatigue (usually called corrosion-fatigue) behaviour of metallic material and their synergistic influence on the life of monopile foundations of offshore wind turbines.

Projects

My postdoctoral  research is a part of Corroion-Fatigue Life Optimization (C-FLO)
project. The overall objective of this project is to develop an advanced corrosion-fatigue model for the service life prediction of offshore monopile foundations.

Fayezioghani, A., Vandoren, B., & Sluys, L. J. (2019). Performance-based step-length adaptation laws for path-following methods. Computers and Structures, 223. https://doi.org/10.1016/j.compstruc.2019.07.009

Fayezioghani, A., Vandoren, B., & Sluys, L. J. (2019). A posteriori performance-based comparison of three new path-following constraints for damage analysis of quasi-brittle materials. Computer Methods in Applied Mechanics and Engineering, 346, 746–768. . https://doi.org/10.1016/j.cma.2018.09.014

Fayezioghani, A., & Moharrami, H. (2015). Optimal Control via Integrating the Dynamics of Magnetorheological Dampers and Structures. Civil Engineering Infrastructures Journal (Ceij) (Journal of Faculty of Engineering), 48(2), 345–357. https://doi.org/10.7508/ceij.2015.02.009

Kazemi Bidokhti, K., Moharrami, H., & Fayezi, A. (2012). Semi-active fuzzy control for seismic response reduction of building frames using SHD dampers. Structural Control and Health Monitoring, 19(3), 417–435. https://doi.org/10.1002/stc.441 

Fayezioghani, A., Vandoren, B., & Sluys, L. J. (2019). Performance-based step-length adaptation laws for path-following methods. Computers and Structures, 223. https://doi.org/10.1016/j.compstruc.2019.07.009 

Fayezioghani, A., Vandoren, B., & Sluys, L. J. (2019). A posteriori performance-based comparison of three new path-following constraints for damage analysis of quasi-brittle materials. Computer Methods in Applied Mechanics and Engineering, 346, 746–768. https://doi.org/10.1016/j.cma.2018.09.014 

Fayezioghani, A., & Moharrami, H. (2015). Optimal Control via Integrating the Dynamics of Magnetorheological Dampers and Structures. Civil Engineering Infrastructures Journal (Ceij) (Journal of Faculty of Engineering), 48(2), 345–357. https://doi.org/10.7508/ceij.2015.02.009 

Kazemi Bidokhti, K., Moharrami, H., & Fayezi, A. (2012). Semi-active fuzzy control for seismic response reduction of building frames using SHD dampers. Structural Control and Health Monitoring, 19(3), 417–435. https://doi.org/10.1002/stc.441 

In my PhD, I investigated the fracture of quasi-brittle material such as structural masonry in two distinct but related research lines: a) efficient and robust path-following solution methods and b) a framework for performance assessment of related numerical solutions. Now, the postdoctoral project combines corrosion and fatigue mechanisms and focuses on their synergism. Corrosion and fatigue are two (macrosopically) distinct phenomena investigated by experts in the fields such as chemical engineering and fracture mechanics, respectively. Roughly speaking, corrosion refers to degradation of material due to chemical/electrochemical reactions with the environment and fatigue is a name for nucleation and growth of cracks in the material because of cyclic loads. Hence, corrosion-fatigue is simultaneous occurrence of and interaction between the two phenomena which, according to experimental measurements, intensifies crack growth and degradation of material more than each single of the phenomena.

C-FLO project is part of the GROW programme on offshore wind energy. The GROW programme aims to reduce levelised costs of offshore wind electricity, to create added value for the Dutch economy and to strengthen the Dutch offshore wind industry. In the GROW programme 19 Dutch partners cooperate.

It is vital to properly evaluate the structural performance of monopile foundations and the influence of environmental actions on corrosion and fatigue that drive the amount of steel and corrosion mitigation needed. Throughout the various life stages, multidisciplinary requirements result in a suboptimal design given the uncertainties in the service life prediction. Hence there is sufficient room for design improvements towards a lighter monopile (less material required and easier to install); more efficient maintenance, inspection and corrosion protection; extended service life of the monopile and the possibility for repowering. On the other hand, too optimistic design might lead to unacceptable risks. The overall objective of this project is to develop an advanced corrosion-fatigue model for the service life prediction of offshore monopile foundations. The desired outcome of the research is an improved life prediction model including the effect of
corrosion protection systems and a structural assessment guidance.

Amir Fayezioghani

Department:
Materials, Mechanics, Management & Design (3MD)

Section:
Applied Mechanics

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