Bending of Delaminated Composite Conoidal Shells under Uniformly Distributed Load
Publication: Journal of Engineering Mechanics
Volume 137, Issue 10
Abstract
Conoidal shells are very popular roofing units owing to their aesthetic elegance and stiffness. Many parts of the globe, which were earlier assumed to be seismologically stable, are now being considered as earthquake prone. Hence the necessity to build light structures using composites has become very important. In this paper an eight-noded isoparametric shell element is applied for analyzing the bending behavior of delaminated composite conoidal shells under a uniformly distributed load with different practical boundary conditions. To ensure compatibility of deformation and equilibrium of forces and moments at the delamination crack front, a multipoint constraint algorithm is incorporated, which leads to an unsymmetrical stiffness matrix. This formulation is validated through the solution of benchmark problems. Lamination, curvature, and extent of delamination area are varied to compare the performances of delaminated conoidal shells against those with no damage. The results are carefully observed, and a set of conclusions is presented at the end of the paper.
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Published In
Journal of Engineering Mechanics
Volume 137 • Issue 10 • October 2011
Pages: 660 - 668
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Sep 16, 2009
Accepted: Jun 1, 2011
Published online: Sep 15, 2011
Published in print: Oct 1, 2011
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