On how pseudo-ductility modifies the translaminar fracture toughness of composites and the nominal strength of centre-cracked specimens
Among the efforts to revert the traditionally brittle characteristic of laminated composites, pseudo-ductility relies on utilising hybridisation to stimulate sub-critical damage mechanisms. However, how such pseudo-ductility would translate into an increase in material toughness or an improvement in...
| Authors: | , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2024 |
| Country: | España |
| Institution: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repository: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:10256/25068 |
| Online Access: | http://hdl.handle.net/10256/25068 |
| Access Level: | Open access |
| Keyword: | Resistència de materials Strength of materials Materials laminats Laminated materials Mecànica de fractura Fracture mechanics Elements finits, Mètode dels Finite element method Anàlisi numèrica Numerical analysis |
| Summary: | Among the efforts to revert the traditionally brittle characteristic of laminated composites, pseudo-ductility relies on utilising hybridisation to stimulate sub-critical damage mechanisms. However, how such pseudo-ductility would translate into an increase in material toughness or an improvement in the strength of the sub-components remains unclear. To elucidate this, we perform a numerical study departing from a parameterised pseudo-ductile model implemented in a finite element model. We use non-dimensional analysis to investigate the effect of the two most relevant parameters: pseudo-ductile strain (ɛd) and the ratio of ultimate strength to pseudo-ductile yield strength (of/oy). We infer material toughness from the simulation of Compact Tension specimens, and it is shown to increase linearly with ɛd, and non-linearly with of/oy but tends to a plateau. Then, the simulation of Centre Cracked scaled specimens reveal that the nominal strength increases on the elastic limit extreme (large specimens) but decreases below a given size |
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