Structural Engineering and Mechanics

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Free-edge effect in cross-ply laminated plates under a uniform extension

  • Sheng, Hongyu (Institute of Civil Engineering, Hefei University of Technology) ;
  • Ye, Jianqiao (School of Civil Engineering, University of Leeds)
  • Received : 2003.06.10
  • Accepted : 2004.02.24
  • Published : 2004.09.25
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Abstract

Based on the basic equations of elasticity, free-edge effects on stresses in cross-ply laminated plates are found by using the state space method. The laminates are subjected to uniaxial-uniform extension plate, which is a typical example of general plane strain problem. The study takes into account material constants of all individual material layers and the state equation of a laminate is solved analytically in the through thickness direction. By this approach, a composite plate may be composed of an arbitrary number of orthotropic layers, each of which may have different material properties and thickness. The solution provides a continuous displacement and inter-laminar stress fields across all material interfaces and an approxiamte prediction to the singularity of stresses occurring in the boundary layer region of a free-edge. Numerical solutions are obtained and compared with the results obtained from an alternative numerical method.

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References

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