Eventos Anais de eventos
MecSol 2017
6th International Symposium on Solid Mechanics
ACOUSTIC EMISSION TESTS: SIMULATIONS USING LATTICE DISCRETE ELEMENT METHOD
Submission Author:
Gabriel Birck , RS
Co-Authors:
Ignacio Iturrioz
Presenter: Gabriel Birck
doi://10.26678/ABCM.MecSol2017.MSL17-0112
Abstract
The methods proposed to predict the damage process in quasi-brittle materials may be classified into two large groups: those based on continuum mechanics, i.e. the so-called classical approach and the statistical models approach. In the first, plasticity theories are extended to study the damage process, leading to procedures that encounter serious difficulties when dealing with quasi-brittle materials, in which scale effects, anisotropic damage and associative defects are likely to occur. The statistical model approach consist on simulate the solid with a set of nodes where the solid mass is dumped are interlinked with interaction functions that as in whole represent the solid behaviour. The formulation presented in this work is a particular case of the second group, called Lattice Model, namely LDEM. This model is based on the representation of a solid by means of a cubic arrangement of elements able to carry only axial loads. This approach takes into account the irreversible effects of crack nucleation and propagation bars. In the present work, three applications are presented with the aim to illustrate how the simulation of Acoustic Emission tests let understand the behaviour of the damage process in quasi-brittle materials. The results obtained in the simulation are useful to understand the experimental ones. Therefore, LDEM can be auxiliary tool for the interpretation of Acoustic Emission tests.
Keywords
Heterogeneous materials, Lattice Model, Acoustic Emission Technique, Damage Process
