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Modélisation de la rupture du béton dans le but de prédire le comportement de structures soumises à des impacts
| Content Provider | Semantic Scholar |
|---|---|
| Author | Guillaume, Laurent |
| Copyright Year | 2017 |
| Abstract | Modelling of the failure of concrete in order to predict the behaviour of impacted structures ULG Faculty of Applied Science Academic year 2016-2017 Master in Mechanical Engineering Laurent GUILLAUME In the field of road safety, crash tests are frequently carried out against safety barriers in order to check their behaviour and improve them. They can also be modelled thanks to finite element software such as LS-DYNA for the purpose of reducing the cost of all these tests. This thesis aims at the end to model as precisely as possible the behaviour of the barriers made up of concrete so that the reality is approximated as accurately as possible. The difficulty lies in the failure of the concrete. Consequently, the post-peak phase must be modelled correctly. For this purpose, several steps involving more and more complex structures were modelled. At first, simple elements were tested in order to find the pros and cons of the constitutive models "Karagozian & Case", "Winfrith" and "Continuous Surface Cap Model" implemented in LS-DYNA. Then, the most adapted to the testing model was chosen : the "Continuous Surface Cap Model", because it is more complete and its use seems to be simpler than its competitors. The following of the thesis focuses on compression tests on cylindrical sample and bending tests on beams. Therefore, the influence of several parameters has been studied. Furthermore the failure of the material in different cases has been analysed. Finally, crash tests simulations were performed. By calibrating as precisely as possible the fracture energies, the results came a little closer to the reality. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://matheo.uliege.be/bitstream/2268.2/2608/10/R%C3%A9sum%C3%A9_TFE_GUILLAUME_Laurent.pdf |
| Alternate Webpage(s) | https://matheo.uliege.be/bitstream/2268.2/2608/11/Abstract_TFE_GUILLAUME_Laurent.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
