Abstract
A postbuckling blade-stiffened composite panel was loaded in uniaxial compression, until failure. During loading beyond initial buckling, this panel was observed to undergo a secondary instability characterised by a dynamic mode shape change. These abrupt changes cause considerable numerical difficulties using standard path-following quasi-static solution procedures in finite element analysis. Improved methods such as the arc-length-related procedures do better at traversing certain critical points along an equilibrium path but these procedures may also encounter difficulties in highly non-linear problems. This paper presents a robust, modified explicit dynamic analysis for the modelling of postbuckling structures. This method was shown to predict the mode-switch with good accuracy and is more efficient than standard explicit dynamic analysis. (C) 2003 Elsevier Science Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 447-453 |
| Number of pages | 7 |
| Journal | Composite Structures |
| Volume | 60 |
| Issue number | 4 |
| Early online date | 20 Mar 2003 |
| DOIs | |
| Publication status | Published - Jun 2003 |
ASJC Scopus subject areas
- Civil and Structural Engineering
- Ceramics and Composites