Dynamic mode II delamination fracture of unidirectional graphite/epoxy composites
| Autor: | David Hui, Sylvanus N Nwosu, Piyush K. Dutta |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Strain energy release rate
Measurement method Materials science Mechanical Engineering Split-Hopkinson pressure bar Epoxy Power law Industrial and Manufacturing Engineering Fracture toughness Mechanics of Materials visual_art Ceramics and Composites Impact energy visual_art.visual_art_medium Graphite Composite material |
| Zdroj: | Composites Part B: Engineering. 34:303-316 |
| ISSN: | 1359-8368 |
| DOI: | 10.1016/s1359-8368(02)00039-2 |
| Popis: | Dynamic fracture and delamination of unidirectional graphite/epoxy composites are investigated for end-notched flexure (ENF) and center-notched flexure (CNF) pure mode II loading configurations using a modified split Hopkinson pressure bar. Results show that delamination and energy absorbed in fracture increase with impact energy with CNF>ENF. A power law analytical model reasonably describes the variation of energy release rate with delamination and energy absorbed. A crack embedded deeper in a specimen (as in CNF) contributes more to dynamic fragmentation than cracks at the surface or near the edge (as in ENF). Hackle features on mode II fracture surfaces decrease with impact energy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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