Abstract
The energetic variational analysis of the initial postcritical behavior of homogenized orthotropic columns presented in a previous paper is here revisited in the specific context of sandwich structures. For this purpose, consideration of the transverse deformation in the core is found to be essential. It is shown that imperfection sensitivity can arise for a certain range of stiffness and geometric parameters. The bifurcation is symmetric and Koiter's 2/3-power law is followed. Finite element simulations of short columns validate analytical predictions of maximum load reduction due to imperfection sensitivity.
Original language | English (US) |
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Pages (from-to) | 159-164 |
Number of pages | 6 |
Journal | Composites Part B: Engineering |
Volume | 39 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2008 |
Funding
Financial support under Grant N00014-02-I-0622 from the Office of Naval Research to Northwestern University (monitored by Dr. Yapa D.S. Rajapakse) is gratefully acknowledged.
Keywords
- A. Polymer-matrix composites (PMCs)
- B. Buckling
- B. Delamination
- B. Fracture
- Sandwich structures
ASJC Scopus subject areas
- Ceramics and Composites
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering