Abstract
A three-dimensional finite element model of a composite tensile specimen consisting of a Ti-6Al-4V matrix reinforced with unidirectional, continuous SiC fibres under cyclic loading has been developed. The model includes the fibre/matrix morphology, with the interface interaction being governed by the Coulomb friction law. The influence of the applied load ratio on the true crack-tip load ratio has been investigated for three different applied load ratios. The results from the model show that due to a combination of thermal residual stresses from processing and fibre bridging, the crack-tip load ratio becomes independent of the applied load ratio after a small amount of crack growth. With the fatigue threshold depending strongly on the load ratio, crack arrest occurs at a later stage than would be predicted from the applied load ratio. © 2002 Elsevier Science Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 1205-1211 |
| Number of pages | 6 |
| Journal | International Journal of Fatigue |
| Volume | 24 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 2002 |
Keywords
- Cyclic fatigue
- Fibre bridging
- Finite element modelling