Collapse of Composite Rings Due to Delamination Buckling Under External Pressure
Publication: Journal of Engineering Mechanics
Volume 128, Issue 11
Abstract
The collapse of cylindrical shells under external pressure is known to be controlled by global elastic buckling, material failure, or a combination thereof. In the case of composites, delamination is another factor affecting the stiffness and stability of the structural component. Thin inner delaminated layers are expected to locally buckle inwards, under hoop compression, reducing the effective thickness of the ring wall. This may lead to a premature collapse of composite rings. The problem is numerically treated and parametrically studied. A Fourier series-based finite-element model is formulated for delaminated composite tubular cross sections. A special “chord length” procedure is developed to enable the convergence of the local buckling solution in quasi-static nonlinear analysis. Parametric studies are conducted to assess the influence of delamination length, depth, location, out-of-roundness imperfection, and ring layup on the pressure levels at delamination buckling and collapse.
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Information
Published In
Journal of Engineering Mechanics
Volume 128 • Issue 11 • November 2002
Pages: 1174 - 1181
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Apr 16, 2001
Accepted: Jan 11, 2002
Published online: Oct 15, 2002
Published in print: Nov 2002
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