Simulation of subcritical crack propagation in quase-brittle materials applying a version of the discrete element method formed by beams

作者：Soares F S^*; Iturrioz I

来源：Revista Internacional de Metodos Numericos Para Calculo y Diseno en Ingenieria, 2016, 32(3): 153-162.

DOI：10.1016/j.rimni.2015.03.001

• Fatigue
• Quasi-brittle materials
• Discrete elements methods

There are numerous applications, of technological interest, where materials of quasi-brittle behavior, as in the case of cement-based composite materials, rocks and composites formed by the mixture of ceramics with other phases, are subjected to oscillating loads and suffer degradation of its properties. To develop analysis tools that allow to understand and to predict this degradation governing mechanisms is an opened problem in modern engineering. In this context, in the present work, it is used a version of the discrete element method formed by beams to explore its possibilities in simulating the degradation mechanisms that occur in quasi-brittle materials when subjected to fatigue. Simulations over simple geometry test subjects are presented and several aspects of this problem are discussed and among the problems: it is explored the relationship between micro and macro mechanic parameters of the used model and how the scale effect is captured and influences this relationship. The presented preliminary results show the potentiality of the proposed methodology to understand the micro mechanisms of damage that occur in quasi-brittle materials and also to predict its evolution.

• 出版日期2016-9