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Structural behavior of composites with progressive fractureStructural characteristics such as natural frequencies and buckling loads with corresponding mode shapes were investigated during progressive fracture of multilayer, angle-plied polymer matrix composites. A computer program was used to generate the numerical results for overall mechanical response of damaged composites. Variations in structural characteristics as a function of the previously applied loading were studied. Results indicate that most of the overall structural properties were preserved throughout a significant proportion of the ultimate fracture load. For the cases studied, changes in structural behavior began to occur after 70 percent of the ultimate fracture load was applied. However, the individual nature of the structural change was rather varied depending on the laminate configuration, fiber orientation, and the boundary conditions.
Document ID
Document Type
Technical Memorandum (TM)
Minnetyan, Levon
(Clarkson Univ. Potsdam, NY., United States)
Chamis, Christos C.
(NASA Lewis Research Center Cleveland, OH, United States)
Murthy, Pappu L. N.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1990
Subject Category
Composite Materials
Report/Patent Number
NAS 1.15:102370
Accession Number
Funding Number(s)
PROJECT: RTOP 505-63-11
Distribution Limits
Work of the US Gov. Public Use Permitted.
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