Structural Engineering and Mechanics

Techno-Press (테크노프레스)
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Nonlinear dynamic buckling of laminated angle-ply composite spherical caps

  • Gupta, S.S. (Institute of Armament Technology) ;
  • Patel, B.P. (Institute of Armament Technology) ;
  • Ganapathi, M. (Institute of Armament Technology)
  • Received : 2002.07.22
  • Accepted : 2003.03.06
  • Published : 2003.04.25
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Abstract

This paper deals with nonlinear asymmetric dynamic buckling of clamped laminated angle-ply composite spherical shells under suddenly applied pressure loads. The formulation is based on first-order shear deformation theory and Lagrange's equation of motion. The nonlinearity due to finite deformation of the shell considering von Karman's assumptions is included in the formulation. The buckling loads are obtained through dynamic response history using Newmark's numerical integration scheme coupled with a Newton-Raphson iteration technique. An axisymmetric curved shell element is used to investigate the dynamic characteristics of the spherical caps. The pressure value beyond which the maximum average displacement response shows significant growth rate in the time history of the shell structure is considered as critical dynamic load. Detailed numerical results are presented to highlight the influence of ply-angle, shell geometric parameter and asymmetric mode on the critical load of spherical caps.

Keywords

References

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