Damage Index Proposals Applied to Quasi-Fragile Materials Simulated Using the Lattice Discrete Element Method

摘要

The process of damage in quasi-fragile materials is characterized by loss of isotropy for certain load levels, the strain localization, the cooperative effect between damaged regions and the avalanche of ruptures are particular features in the damage process of this kind of material. This behavior is not easy to represent with a continuous approach. In the present work a version of the Lattice Discrete Element Method (LDEM) is employed. This methodology allows the simulation of fracture and fragmentation in natural way. Different indexes will be shown to perform the measurement of the damage evolution in the context of LDEM. The performance of these indexes to evaluate the damage evolution is discussed in this paper.