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FARZAD EBRAHIMI

Abstract

FREE VIBRATION ANALYSIS OF ROTATING FUNCTIONALLY GRADED (FG) THICK TIMOSHENKO BEAMS IS PRESENTED. THE MATERIAL PROPERTIES OF FG BEAM VARY ALONG THE THICKNESS DIRECTION OF THE CONSTITUENTS AC-CORDING TO POWER LAW MODEL. GOVERNING EQUATIONS ARE DERIVED THROUGH HAMILTONÂS PRINCIPLE AND THEY ARE SOLVED APPLYING DIFFER-ENTIAL TRANSFORM METHOD. THE GOOD AGREEMENT BETWEEN THE RESULTS OF THIS ARTICLE AND THOSE AVAILABLE IN LITERATURE VALIDATED THE PRE-SENTED APPROACH. THE EMPHASIS IS PLACED ON INVESTIGATING THE EFFECT OF SEVERAL BEAM PARAMETERS SUCH AS CONSTITUENT VOLUME FRACTIONS, SLENDERNESS RATIOS, ROTATIONAL SPEED AND HUB RADIUS ON NATURAL FREQUENCIES AND MODE SHAPES OF THE ROTATING THICK FG BEAM.

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Author Biography

FARZAD EBRAHIMI, IMAM KHOMEINI INTERNATIONAL UNIVERSITY

Dr. Farzad Ebrahimi was born in Qazvin, Iran, in 1979. He graduated in Mechanical engineering, from the University of Tehran, Iran, in 2002. He received his Msc and PhD in Mechanical engineering, with a specialization in applied design from the University of Tehran, Iran, in 2009. Since 2002, he has been working at the “Smart Materials and Structures Lab” Research Center of the Faculty of Mechanical Engineering at the University of Tehran, where he is a researcher of smart functionally graded materials and structures. He is involved in several international journals as editor and reviewer. He serves on the editorial board of “Far East Journal of Mechanical Engineering and Physics”. He is the author of books “Smart Functionally Graded Plates” and “Progress in Analysis of Functionally Graded Structures”, Nova Science Publishers, NY. He also served as the editor of the book “Advances in Vibration Analysis Research”, InTech – Open Access Publisher, Croatia. His research interests focus on areas of smart materials and structures, plate and shell theory, vibration analysis of continuous systems, composite materials and structures, functionally graded materials and structures, finite element analysis and fracture mechanics and he has published several researches in these fields. His research in these areas has been presented at international conferences and appeared in academic journals such as “Journal of Mechanical Science and Technology”, “Smart Materials and Structures”, “European Journal of Mechanics” and ”Archive of Applied Mechanics and Thin Walled Structures”. Farzad has also strong collaboration with Iranian industries on gas and oil projects, as well as serves as ad-hoc referee in several top academic journals.