Nonlinear Behavior of Fiber Composite Materials and Its Effect on the Postbuckling Response of Laminated Plates
Author | : |
Publisher | : |
Total Pages | : 74 |
Release | : 1990 |
ISBN-10 | : OCLC:227767691 |
ISBN-13 | : |
Rating | : 4/5 (91 Downloads) |
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.