Compaction and tensile damage in concrete: constitutive modelling and application to dynamics

The objective of this study is to develop a model for concrete with an emph asis on tension and compaction. Compaction of concrete is physically a coll apse of the material voids. It produces plastic strains in the material and , ar the same tithe, an increase of the bulk modulus. The model is based on mechanics of porous materials, damage and plasticity;. The computational i mplementation has been carried out in the Lagrangian finite element code DY NA3D. In order to show the influence of compaction, simulations of a split Hopkinson test performed on confined concrete and on a concrete rod submitt ed to an impact have been carried out. The examples demonstrate the importa nce of compaction during an impact. which has a tendency of strengthening t he concrete structure, (C) 2000 Elsevier Science S.A. All rights reserved.