Effect of Localized Bending at Through‐Flaws in Pressurized Composite Cylinders
Publication: Journal of Aerospace Engineering
Volume 6, Issue 4
Abstract
An analytical and experimental investigation was conducted to determine the effect of localized bending at through‐flaws in pressurized composite cylinders. A finite‐difference solution was formulated to determine the stress, strain, and displacement fields in the vicinity of a slit. Tests were conducted on 305‐mm‐diameter cylinders made from graphite/epoxy fabric in a configuration, with axial slits. Surface‐strain‐field measurements made in the vicinity of the slit showed a significant bending, which verified the finite‐difference solution. This significant bending near the slit tip results in a large magnification of the stresses there. An average stress criterion was employed to predict the failure response of these cylinders based on data obtained from coupon specimens. The finite‐difference solution provided correction factors to account for the localized bending. The prediction utilizing this methodology was excellent in all cases. A generalized methodology to assess damage tolerance of structural configurations with notches is proposed.
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Information & Authors
Information
Published In
Journal of Aerospace Engineering
Volume 6 • Issue 4 • October 1993
Pages: 381 - 393
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Jan 10, 1991
Published online: Oct 1, 1993
Published in print: Oct 1993
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