Damage prediction in a concrete bar due to a compression and tension pulse: A comparison of the K&C, the CSCM and the RHT material models in LS-DYNA

Damage prediction in a concrete bar due to a compression and tension pulse: A comparison of the K&C, the CSCM and the RHT material models in LS-DYNA

Magalhaes Pereira, L.F.
Weerheijm, J.
Sluys, L.J.

Civil Engineering and Geosciences

Structural Engineering

2013-09-17

Advanced Finite Element codes provide the possibility to simulate high rate loading on concrete targets as ballistic impact and explosions. Although damage to RC structures due to these loadings can be simulated and detailed results can be obtained the predictions are still far from perfect. It is well known that the results strongly depend on the numerical material model. In a collaboration project of AFA, IST, Delft University of Technology and TNO damage prediction in concrete panels due to close in explosions and the residual bearing capacity are studied. The hydrodynamic finite element computer code (Hydrocode) LS-DYNA was chosen as the computational tool to pursue this research. The first step was the comparison and analysis of the three most advanced concrete models implemented in LS-DYNA: Karagozian & Case Concrete model (KCC), Continuous Surface Cap Model (CSCM) and Riedel, Hiermaier and Thoma (RHT) model. The models were tested under a wide range of configurations in order to evaluate their response under different stress states and loading rates. In this paper our attentions are focus on the damage development in compression and tension. Bar tests were modelled in order to explore the material model’s dynamic response in a more controlled way.

http://resolver.tudelft.nl/uuid:211bc346-848f-4d69-b829-09052d6da396

15th ISIEMS Conference: International Symposium on the Interaction of the Effects of Munitions with Structures, Potsdam, Germany, 17-20 September 2013; presented paper

Institutional Repository

conference paper

(c) 2013 The Author(s)