Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

THERMAL POSTBUCKLING CHARACTERISTICS OF STEP-FORMED FG PANELS WITH TEMPERATURE-DEPENDENT MATERIAL IN SUPERSONIC FLOW

  • Lee, Sang-Lae (Institute of Advanced Aerospace Technology, School of Mechanical and Aerospace Engineering) ;
  • Kim, Ji-Hwan (Institute of Advanced Aerospace Technology, School of Mechanical and Aerospace Engineering)
  • Published : 2007.05.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, it is investigated the thermal post-buckling characteristics of step-formed FG panel under the heat and supersonic flow. Material properties are assumed to be temperature dependent as well as continuously varying in the thickness direction of the panel according to a simple power law distribution in terms of the volume fraction of the constituent. First-order shear deformation theory(FSDT) of plate is applied to model the panel, and the von Karman strain-displacement relations are adopted to consider the geometric nonlinearity due to large deformation. Also, the first-order piston theory is used to model the supersonic aerodynamic load acting on a panel. Numerical results are summarized to reveal the thermal post-buckling behaviors of FG panels with various volume fractions, temperature conditions and aerodynamic pressures in detail.

Keywords