Title page for ETD etd-10022007-145159


Type of Document Dissertation
Author Lee, Ho Hyung
URN etd-10022007-145159
Title Postbuckling failure of composite plates with central holes
Degree PhD
Department Engineering Mechanics
Advisory Committee
Advisor Name Title
No Advisors Found
Keywords
  • Buckling (Mechanics)
Date of Defense 1991-11-05
Availability restricted
Abstract

The postbuckling failure of square composite plates with central holes is analyzed numerically and experimentally. The particular plates studied have stacking sequences of [± 45/0/90]25, [± 45/02]25, [± 45/06]5. and [± 45]45. A simple plate geometry, one with a hole diameter to plate width ratio of 0.3 , is considered. Failure load, failure mode, and failure locations are predicted numerically by using the finite-element method. The predictions are compared with experimental results. In the experiments in order to be accomodated by the test fixture it is necessary for the plates to be slightly larger than the analYSis region, extending somewhat beyond the supports. The region outside the supports is included in the numerical study. It is shown that not considering these regions can lead to erroneous numerical predictions. In numerical failure analysis the interlaminar shear stresses, as well as the inplane stresses, are taken into account. By comparing the interlaminar shear stress calculations from the finite-element method with analytical results for simple cases, a solid foundation for interlaminar shear stress calculation is established.

Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
[VT] LD5655.V856_1991.L438.pdf 34.05 Mb 02:37:38 01:21:04 01:10:56 00:35:28 00:03:01
[BTD] next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.