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Computers and Concrete Volume 5, Number 4, August 2008 , pages 329-342 DOI: https://doi.org/10.12989/cac.2008.5.4.329 |
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Compaction process in concrete during missile impact: a DEM analysis |
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Wenjie Shiu, Frederic-Victor Donze and Laurent Daudeville
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| Abstract | ||
| A local behavior law, which includes elasticity, plasticity and damage, is developed in a three dimensional numerical model for concrete. The model is based on the Discrete Element Method (DEM)and the computational implementation has been carried out in the numerical Code YADE. This model was used to study the response of a concrete slab impacted by a rigid missile, and focuses on the extension of the compacted zone. To do so, the model was first used to simulate compression and hydrostatic tests. Once the local constitutive law parameters of the discrete element model were calibrated, the numerical model simulated the impact of a rigid missile used as a reference case to be compared to an experimental data set. From this reference case, simulations were carried out to show the importance of compaction during an impact and how it expands depending on the different impact conditions. Moreover, the numerical results were compared to empirical predictive formulae for penetration and perforation cases, demonstrating the importance of taking into account the local compaction process in the local interaction law between discrete elements. | ||
| Key Words | ||
| impact missile; compaction; concrete model; discrete element method. | ||
| Address | ||
| Wenjie Shiu, Frederic-Victor Donze and Laurent Daudeville : Laboratoire ?Sols Solides Structures et Risques?, UMR5521, Universite Joseph Fourier,Grenoble Universite, BP53, 38041 Grenoble cedex 9, France | ||