Structural Engineering and Mechanics

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Application of FEM in nonlinear progressive failure of composite skew plates with practical non-uniform edge conditions

  • Dona Chatterjee (Department of Civil Engineering, Heritage Institute of Technology) ;
  • Arghya Ghosh (Department of Civil Engineering, Netaji Subhas University of Technology) ;
  • Dipankar Chakravorty (Department of Civil Engineering, Jadavpur University)
  • Received : 2023.09.05
  • Accepted : 2024.04.17
  • Published : 2024.05.10
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Abstract

Composite skew plates are aesthetically appealing light weight structural units finding wide applications in floors and roofs of commercial buildings. Although bending and vibration characteristics of these units have received attention from researchers but the domain of first and progressive failure has not been explored. Confident use of these plates necessitates comprehensive understanding of their failure behavior. With this objective, the present paper uses an eight noded isoparametric finite element together with von-Kármán's approach of nonlinear strains to study first ply and progressive failure up to ultimate damage of skew plates being subjected to uniform surface pressure. Parameters like skew angles, laminations and boundary conditions are varied and the results are practically analyzed. The novelty of the paper lies in the fact that the stiffness matrix of the damaged plate is calculated by considering material degradation locally only at failed points at each stage of first and progressive failure and as a result, the present outputs are so close to experimental findings. Interpretation of results from practical angles and proposing the relative performances of the different plate combinations in terms of ranks will be of much help to practicing engineers in selecting the best suited plate option among many combinations.

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References

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