Abstract
Microbuckling in composite laminates is thought to initiate by the elastic bending of fibres, loaded by resin matrix material in shear. The fibres rotate and break in two places, forming a kink band. The fibres then rotate further until the matrix between the fibres fails, and the kink band and hence the laminate loses its load carrying capability. The present work investigates existing criteria for fibre microbuckling failure in a 0° unidirectional carbon-fibre-reinforced plastic (CFRP) laminate loaded in compression. From simple arguments, it is concluded that fibres undergoing bending cannot fail in tension on their convex side but rather that they fail in compression on their concave side. Inferences are made on which failure criterion should be used to predict unidirectional laminate failure when the failure mode is by 0° fibre microbuckling (or fibre kinking).
| Original language | English |
|---|---|
| Pages (from-to) | 1451-1455 |
| Number of pages | 4 |
| Journal | Composites Science and Technology |
| Volume | 59 |
| Issue number | 9 |
| Publication status | Published - Jul 1999 |
Keywords
- A. Carbon fibres
- A. Polymer-matrix composites (PMCs)
- B. Fracture
- B. Non-linear behaviour
- C. Failure criterion