THREE DIMENSIONAL FREE VIBRATION AND TRANSIENT ANALYSIS OF TWO DIRECTIONAL FUNCTIONALLY GRADED THICK CYLINDRICAL PANELS UNDER IMPACT LOADING

Authors

  • HASSAN ZAFARMAND MECHANICAL ENGINEERING DEPARTMENT, AMIRKABIR UNIVERSITY OF TECHNOLOGY, 424 HAFEZ AVENUE, TEHRAN 1591634311, IRAN *PERMANENT ADDRESS: DEPARTMENT OF MECHANICAL ENGINEERING, FERDOWSI UNIVERSITY OF MASHHAD, MASHHAD, IRAN.
  • MANOUCHEHR SALEHI MECHANICAL ENGINEERING DEPARTMENT, AMIRKABIR UNIVERSITY OF TECHNOLOGY, 424 HAFEZ AVENUE, TEHRAN 1591634311, IRAN
  • KAMRAN ASEMI MECHANICAL ENGINEERING DEPARTMENT, AMIRKABIR UNIVERSITY OF TECHNOLOGY, 424 HAFEZ AVENUE, TEHRAN 1591634311, IRAN

Keywords:

DYNAMIC ANALYSIS, IMPACT LOADING, CYLINDRICAL PANEL, THEORY OF ELASTICITY, 2D FUNCTIONALLY GRADED MATERIALS, GRADED FINITE ELE-MENT METHOD

Abstract

IN THIS PAPER THREE DIMENSIONAL FREE VIBRATION AND TRANSIENT RESPONSE OF A CYLINDRICAL PANEL MADE OF TWO DIRECTIONAL FUNCTIONALLY GRADED MATERIALS (2D-FGMS) BASED ON THREE DIMENSIONAL EQUATIONS OF ELASTICITY AND SUBJECTED TO INTERNAL IMPACT LOADING IS CONSIDERED. MATERIAL PROPERTIES VARY THROUGH BOTH RADIAL AND AXIAL DIRECTIONS CONTINUOUSLY. THE 3D GRADED FINITE ELEMENT METHOD (GFEM) BASED ON RAYLEIGH-RITZ ENERGY FORMULATION AND NEWMARK DIRECT INTEGRATION METHOD HAS BEEN APPLIED TO SOLVE THE EQUATIONS IN SPACE AND TIME DOMAINS. THE FUNDAMENTAL NORMALIZED NATURAL FREQUENCY, TIME HISTORY OF DISPLACEMENTS AND STRESSES IN THREE DIRECTIONS AND VELOCITY OF RADIAL STRESS WAVE PROPAGATION FOR VARIOUS VALUES OF SPAN ANGEL OF CYLINDRICAL PANEL AND DIFFERENT POWER LAW EXPONENTS HAVE BEEN INVESTIGATED. THE PRESENT RESULTS SHOW THAT USING 2D-FGMS LEADS TO A MORE ϬEXIBLE DESIGN THAN CONVENTIONAL 1D-FGMS. THE GFEM SOLUTION HAVE BEEN COMPARED WITH THE RESULTS OF AN FG THICK HOLLOW CYLINDER AND AN FG CURVED PANEL, WHERE A GOOD AGREEMENT BETWEEN THEM IS OBSERVED.

Author Biography

MANOUCHEHR SALEHI, MECHANICAL ENGINEERING DEPARTMENT, AMIRKABIR UNIVERSITY OF TECHNOLOGY, 424 HAFEZ AVENUE, TEHRAN 1591634311, IRAN

MECHANICAL ENGINEERING, 2ND IN IRAN

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Published

2014-10-13

Issue

Vol. 12 No. 2 (2015)

Section

Articles

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