TY  - JOUR
IS  - 4
VL  - 42
PB  - Elsevier
Y1  - 2009///
JF  - Chaos, Solitons and Fractals
UR  - http://www.sciencedirect.com/science/article/pii/S0960077909003531
A1  - Carpinteri, Alberto
A1  - Paggi, Marco
N2  - Many natural and man-made materials exhibit structure over more than one length scale. In this paper, we deal with hierarchical grained composite materials that have recently been designed to achieve superior hardness and toughness as compared to their traditional counterparts. Their nested structure, where meso-grains are recursively composed of smaller and smaller micro-grains at the different scales with a fractal-like topology, is herein studied from a hierarchical perspective. Considering a top-down approach, i.e. from the largest to the smallest scale, we propose a recursive micromechanical model coupled with a generalized fractal mixture rule for the prediction of hardness and toughness of a grained material with n hierarchical levels. A relationship between hardness and toughness is also derived and the analytical predictions are compared with experimental data. 
TI  - A top-down approach for the prediction of hardness and toughness of hierarchical materials 
SP  - 2546 
EP  -  2552
ID  - eprints1975
SN  - 0960-0779
AV  - none
ER  -