My academic background is in the general area of solid mechanics. My specific area of research interests include Composite Materials, , Computational Mechanics, Metamaterials, Smart Materials and Phononic Crystals. I am looking for opportunities to improve my research background in my field of interests.
Dissertation: Wave Propagation in Tunable Phononic Crystals and Homogenization approaches in periodic and random particulate magnetoactive media
Advisor: Professor Faramarz Gordaninejad
Thesis: Environmental Effects on Mechanical Properties of Polymeric Composite Materials
Advisor: Professor M. M. Shokrieh
Research topic: Wave propagation in thermally tunable phononic crystals
The effect of temperature induced large deformations is studied on the bandgaps of the structure. Constitutive laws are derived from a nonlinear energy function taking into account large deformation and temperature. The constitutive laws are applied in the eigenvalue problem to develop the band diagrams and bandgaps of the thermally tunable structure.
Research Topics: Acoustic Metamaterials, Phononic Crystals, Smart Materials, Homogenization Method, Porous Media, Multi-scale Modeling.
-Analytical study of wave propagation in magnetic foams –A micro-meso-macro scale algorithm is developed to include Biot theorem along with fluid-solid interaction in a magnetoactive porous medium to study the acoustic absorbing of a smart foam- preliminary data for a National Science Foundation proposal.
-Theoretical study on nonlinear phononic crystals which includes; nonlinear acoustics, perturbation method, harmonic balance method in weakly nonlinear periodic structures-
-Theoretical study on a novel acoustic diode – A nonlinear medium is coupled with a periodic structure to rectify the acoustic wave propagation in ultrasonic frequency range- preliminary data for a National Science Foundation proposal.
-Design, analysis and simulation of an acoustic cloak to hide underwater structures - preliminary data for a U.S. Navy proposal.
-Nonlinear Finite Element simulation of wave propagation in instability induced phononic crystals- surface instability is employed to induce large deformations in the composite slab and control the bandgaps of the periodic structure.
-Nonlinear Finite Element simulation of wave propagation in magneto-active phononic crystals. A nonlinear magnetoelastic energy function is developed to extract the coupled constitutive laws. Band diagrams are investigated as a function of stretch and magnetic field.
-Developing a new finite element based homogenization method to compute the effective properties of magneto-active composites.
-Developing a new numerical approach for size determination of representative volume element for a randomly particulate magnetoactive medium. A numerical algorithm is developed to combine the Monte-Carlo method with finite element based homogenization method to analyze find the desired size for the representative volume element.
Research Topics: Characterization of Polymeric Composite Materials, Environmental Accelerated Tests:
-Experimental study on environmental effects on mechanical properties of glass/polyester laminated composites.
-Reinforcement of Damaged Structures with Glass and Carbon Fiber Composites.
-Manufacturing polymer composite test specimens for experimental study.
-Outstanding graduate student scholarship- University of Nevada, Reno- 2014
-Outstanding international graduate student scholarship- University of Nevada, Reno- 2014
-Research Assistantship scholarship- University of Nevada, Reno- 2011
-Ranked 57th in Iran national annual university exam among 400,000 participants, 1998
1.Bayat A. and Gordaninejad F., “Computational Homogenization in Soft Magnetoelastic Composite with random particle distributions,” International Journal of Numerical Methods in Engineering, 2015 (under review).
2.Bayat A. and Gordaninejad F., “Switching band-gaps of a phononic crystal slab by surface instability,” Journal of Smart Materials and Structures, 24, 075009 (2015).
3.Bayat A. and Gordaninejad F., “A New Computational Method for Homogenized Tangent Moduli of a Soft Magnetoelastic Composite,” Journal of Smart Materials and Structures, 24, 075010 (2015).
4.Bayat A. and Gordaninejad F., “Dynamic Response of a Tunable Phononic Crystal under Applied Mechanical and Magnetic Loadings,” Journal of Smart Materials and Structures, 24, 065027 (2015).
5.Bayat A. and Gordaninejad F., “Band-gap of a Soft Magnetorheological Phononic Crystal,” ASME Journal of Vibrations and Acoustics, 137, 011013 (2015).
6.Leng D., Sun L., Gordaninejad F., Bayat A. and lin Y., "The Dynamic Performance of Magnetic-Sensitive Elastomers Under Impact Loading," Journal of Smart Materials and Structures, 24, 045023 (2015).
7.Shokrieh M. M. and Bayat A., “Effects of Ultraviolet Radiation on Mechanical Properties of Glass/Polyester Composites,” Journal of Composite Materials, 41, 2443 (2007).
8.Shokrieh M. M. and Bayat A., “UV Absorbers Effect in Preventing Mechanical Properties degradation of Glass/Polyester Composites,” Journal of Sharif University, 24, 49 (2008). (in persian).
1.Bayat A. and Gordaninejad F., “A Magnetically Field-Controllable Phononic Crystal,” Proc. SPIE, San-Diego, USA, 9057, p. 905713, (2014).
2.Bayat A. and Gordaninejad F., “A Wrinkly Phononic Crystal slab,” Proc. SPIE, San-Diego, USA, 9438, p. 943810 (2015).
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