Nonlinear Behavior of Fiber Composite Materials and Its Effect on the Postbuckling Response of Laminated Plates

Download or read book Nonlinear Behavior of Fiber Composite Materials and Its Effect on the Postbuckling Response of Laminated Plates written by and published by . This book was released on 1990 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nonlinear stress-strain behavior of unidirectional fiber composite material was examined. Two approaches were adopted. The first approach considers the stress-strain as nonlinear elastic relations, which are derived at through the use of a complementary energy density function, and takes into account the material symmetry. The second approach adopts the Ramberg-Osgood representation of one-dimensional stress-strain curves. By utilizing the deformation theory to express the nonlinear parts of the strain, a non-linear stress-strain behavior was obtained. An incremental formulation of these theories was implemented in a finite element analysis. These approaches were examined in the context of postbuckling analysis of thick-section laminated plates.