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Thermo-elastic analysis of thick-walled cylinders made of Functionally Graded materials using the strain gradient elasticity

Sadeghi, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1115/SMASIS2010-3603
  3. Abstract:
  4. In this paper, strain gradient thermo-elasticity formulation for Functionally Graded (FG) thick-walled cylinders is presented. Elastic strain energy density function is considered to be a function of gradient of strain tensor in addition to the strain tensor. The material properties are assumed to vary according to power law in radial direction. Using the constitutive equations and equation of equilibrium in the cylindrical coordinates, fourth order non-homogenous governing equation for thermo-elastic analysis of thick-walled FG cylinders subjected to thermal and mechanical loadings is obtained and solved numerically. Results show that the intrinsic length parameter affects the stress distribution in FG thickwalled cylinders greatly and increasing the intrinsic length parameter reduces the maximum radial and hoop stresses. Also, the effect of FG power indices on the radial and hoop stresses are studied
  5. Keywords:
  6. Cylindrical coordinates ; Elastic strain energy ; Fourth order ; Functionally graded ; Governing equations ; Hoop stress ; Material property ; Mechanical loading ; Power indices ; Power law ; Radial direction ; Strain gradient elasticity ; Strain gradients ; Strain tensor ; Thermoelastic analysis ; Thick walled cylinders ; Functionally graded materials ; Intelligent materials ; Intelligent systems ; Residual stresses ; Stress concentration ; Tensors ; Thermoelasticity ; Cylinders (shapes)
  7. Source: ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2010, 28 September 2010 through 1 October 2010 ; Volume 2 , 2010 , Pages 1-6 ; 9780791844168 (ISBN)
  8. URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1613039