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A study on the axial stresses of P-FGM, SFGM and E-FGM plates under pressure loading using the energy concept

Dastoom Laatleyli, H ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. Publisher: 2010
  3. Abstract:
  4. In this study the energy concept along with the classical plate theory (CPT), first and third order shear deformation theories (FSDT and TSDT) are used to predict the large deflection and through the thickness stresses of a FGM plate. For defining the volume fraction of the FGM constituent materials three different functions are considered; simple power-law (PFGM), exponential (E-FGM) and sigmoid (S_FGM) functions. Power-law and exponential functions are commonly used tocontrol the variations of properties of FGMs. However, with both functions, a stress concentration appears due to abruptchange of the volume fraction of the constituents. Therefore, a sigmoid FGM is used to define a new distribution for thevolume fraction. The aim of this paper is to investigate and discuss the differences between these distribution functions for the constituents' volume fraction. For any of these functions, the results for different "n" and different aspect ratios are obtained and the relationships between them and the produced stress curves will be discussed. So, in this wayit will be possible to predict the appropriate distribution functions considering the range of "n" and geometry (aspect ratio) of the plate
  5. Keywords:
  6. Axial stress ; Classical plate theory ; Constituent materials ; Energy concept ; Large deflection ; Power-law ; Pressure loading ; Third-order shear deformation theory ; Aerodynamics ; Aspect ratio ; Stress concentration ; Volume fraction ; Loading
  7. Source: 27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010, 19 September 2010 through 24 September 2010, Nice ; Volume 3 , 2010 , Pages 2060-2068 ; 9781617820496 (ISBN)