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Short-wavelength buckling and shear failures for compression-loaded composite laminatesThe short-wavelength buckling (or the microbuckling) and the interlaminar and inplane shear failures of multi-directional composite laminates loaded in uniaxial compression are investigated. A laminate model is presented that idealizes each lamina. The fibers in the lamina are modeled as a plate, and the matrix in the lamina is modeled as an elastic foundation. The out-of-plane w displacement for each plate is expressed as a trigonometric series in the half-wavelength of the mode shape for laminate short-wavelength buckling. Nonlinear strain-displacement relations are used. The model is applied to symmetric laminates having linear material behavior. The laminates are loaded in uniform end shortening and are simply supported. A linear analysis is used to determine the laminate stress, strain, and mode shape when short-wavelength buckling occurs. The equations for the laminate compressive stress at short-wavelength buckling are dominated by matrix contributions.
Document ID
19860006801
Acquisition Source
Legacy CDMS
Document Type
Thesis/Dissertation
Authors
Shuart, M. J.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 5, 2013
Publication Date
November 1, 1985
Subject Category
Composite Materials
Report/Patent Number
NASA-TM-87640
NAS 1.15:87640
Accession Number
86N16271
Funding Number(s)
PROJECT: RTOP 534-06-23-08
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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