FraMCoS 3 1998 Gifu, Japan

Contribution of a Concrete Compaction Model to an Impact Problem

In the analysis of structures subjected to blasting or impacts, concrete experiences compaction, a decrease of porosity, plastic strains compression and also cracking in tension. The objective of this study is to develop a constitutive model for concrete which covers…

First page of: Contribution of a Concrete Compaction Model to an Impact Problem
Year 1998
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Abstract

In the analysis of structures subjected to blasting or impacts, concrete experiences compaction, a decrease of porosity, plastic strains compression and also cracking in tension. The objective of this study is to develop a constitutive model for concrete which covers this entire range of material nonlinearity. Hence a coupled damage and plasticity constitutive model for concrete under fast dynamic loading is developed. This model is based on mechanics of porous materials, damage plasticity. The constitutive relations are presented and compared with experimental results. The computational implementation has been carried out in the Lagrangian finite element code DYNA3D. In order to show influence of compaction, simulations of a split Hopkinson test performed on confined concrete and a concrete slab subjected to an impact have been carried out. Comparisons between simulations with a classical plasticity model and the present model are discussed in order to exhibit influence of concrete compaction.