Ali Heidari Shirazi

University of Tennessee, Knoxville | Advisor: Reza Abedi, Professor

• Demonstrated the destructive influence of chaos and bifurcation on bandgaps in systems with dead-zone/backlash nonlinearities through time-domain simulations.
• Investigated the effects of positional, material, and geometrical disorder on Bragg-scattering and locally resonant metamaterials.
• Analyzed wave diffraction and the emergence of higher-order modes in layered media.
• Discovered coupled bandgaps in a novel class of metamaterials utilizing parallel beams.
• Applied spacetime Fourier transforms to resolve branch ambiguity challenges in the dynamic homogenization of dispersive and disordered metamaterials.
• Developed a C++ toolset for analyzing wave propagation and retrieving dynamic properties in one-dimensional disordered media.

Shahid Chamran University, Ahvaz | Advisor: Hamid M-Sedighi, Professor

• Applied perturbation methods to analyze the governing equations of nonlinear dynamical systems.
• Investigated coupled rotational–translational local resonators for broadband vibration suppression in elastic metamaterials.

Active Projects

• Disorder Effects on Metamaterial Bandgaps:

  Exploring how structural and material variability influence the robustness of Bragg- and resonance-based bandgaps.

• Multi-Beam Metamaterial Design:

  Designing multi-beam structures that enable advanced dynamic modes and broadened attenuation ranges.

• Wave Diffraction and Higher Order Modes:

  Analyzing diffraction mechanisms and higher order mode generation in layered media.

Academic Projects

• Developed a Retrieval-Augmented Generation (RAG) chatbot and LLM agents using Python and LangChain.
• Optimized bandgaps/wave guides using heuristic optimization techniques.
• Performed statistical analysis of wave property variations in a randomized one-dimensional domain.
• Homogenized a two-phase medium through microstructural image analysis using Convolutional Neural Networks (CNN).
• Extended Slider-Crank mechanism concept as a nonlinear local resonator in metamaterial beams.