Abstract
Finite element analysis of a simplified large particle field, edge constrained plane strain model is used for parametric studies of the influence of particle distributions on post-necking deformation and failure mode in AA5754 aluminum sheets. The models show that the post-necking deformation decreases with volume fraction of particles and fraction of stringers, and increases with interparticle spacing. It is to be noted that a stringer is a string of second phase particles that is frequently observed in continuous strip cast (CC) sheet aluminum alloys. The post-necking deformation initially decreases with the length of stringers, but after a critical stringer length, it increases. An analytical model to estimate the number of stringers which act as initial active damage sources is able to predict a critical stringer length for least post-necking deformation and can serve as a design tool.
| Original language | English |
|---|---|
| Pages (from-to) | 167-183 |
| Number of pages | 17 |
| Journal | International Journal of Fracture |
| Volume | 164 |
| Issue number | 2 |
| DOIs | |
| State | Published - Aug 2010 |
| Externally published | Yes |
Funding
Acknowledgments This work is performed under the funding of General Motors in Canada and Natural Science and Engineering Research Council of Canada (NSERC).
Keywords
- Failure mode
- Finite element analysis
- Microstructures
- Particle distribution
- Post-necking deformation