The Numerical Simulation And Meso-mechanics Analysis Of The Concrete Damage Process In The Static And Dynamic Loads

In this paper, concrete is taken as three-phase composites consisting of aggregate, mortar and bond between aggregate and mortar based on meso-mechanics. The mechanical performance and failure process of concrete subjected to uniaxial compressive stress and concrete simply supported beam in the static and dynamic load are studied by means of the software-ANSYS developed secondly. So the crack propagation, coalescence and failure of concrete is researched by the concrete uniaxial compressive CT test Main work of this paper include:1.Based on the given testing size ,aggregate gradation, mix proportion, the number of each kind of aggregates is calculated in the concrete specimen.The random distribution of aggregate in specimen is generated by Monte-Carlo methed .3-D numerical model of the cylinder specimen of the concrete is established. The dynamic anlysis of numerical model of concrete specimen is ANSYS. The values of materials of aggregate, mortar and bond element are solved by using program studied.2. The numerical model of the concrete cylinder and beam are established. The formation and propagation of the cracks are regarded as a continuous fatigue failure process and the failure process are modeled by damage mechanics-finite-element method. The different damage phases are computed out and the mesh is refined. So the formation and propagation of the concrete cracks are investigated.3. Based on the damage theory, the damage-failure process of concrete cylinder specimen under loading is studied throgh CT test. The results of numerical calculation is compared with that of CT experimentThe formation and propagation of the concrete cracks as well as the failure mechanism of concrete material by meso-mechanics are studied in this paper.