Bewaard in:
| Hoofdauteurs: | , |
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| Formaat: | Recurso digital |
| Taal: | |
| Gepubliceerd in: |
Zenodo
1999
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| Online toegang: | https://doi.org/10.5281/zenodo.15419241 |
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Inhoudsopgave:
- A modified ENF specimens with off mid-plane delamination precrack was used to determine the mixed mode dynamic interlaminar fracture toughness of fiber composites at high crack propagation speeds. A strip of FM-73 adhesive film was placed ahead of the tip of the delamination crack created during laminate lay-up to increase the crack initiation toughness so that after initiation an unstable crack propagation could be produced and high crack propagation speeds achieved. A finite element model was used for the numerical simulation of dynamic crack propagation. Dynamic delamination experiments were performed on modified ENF specimens of unidirectional AS4/3501-6 graphite/epoxy composite under three point bending. The results showed that the dynamic fracture toughness is not affected significantly by crack speed up to 1100 m/s.