Closure of parallel cracks: Micromechanical estimates versus finite element computations

摘要: Abstract 3D finite element simulations have been performed in order to assess the ability of five classical micromechanical estimates model elastic behavior solids with parallel cracks, namely dilute, Mori-Tanaka, self-consistent and differential schemes Ponte-Castaneda Willis bounds. The cracks represented by right circular cylinders aspect ratios as low 10 − 3 centroids randomly located REV. Special attention has paid crack ratio variation predicted different schemes, since goal is ultimately propose a non-linear cracked solid, taking complete closure into account. results confirm earlier studies which showed that scheme was best suited for this kind morphology when computing moduli, but additionally, we show changes aperture are also accurately predicted. It however noted randomness positions leads significant scatter magnitude inside given simulation, suggests do not close simultaneously. As consequence, numerical accounting contact between lips should be completely validate alternate tension/compression loading cases.