Birth of mesomechanics arising from segmentation and multiscaling: nano-micro-macro

Matching of the predicted with the available macroscopic crack growth results for the 2024-T3 and 7075-T6 aluminum alloys demonstrates that the methodology spares a detailed knowledge of the complex microstructure. In principle, the scheme can also be applied to characterize the behavior of carbon nano-tube reinforced composites, however complex, from a knowledge of its macroscopic behavior by tests. The corresponding micro- and nanobehavior are assumed to be obtainable by analysis. To this end, there remains the formulation of the dual scale nano/microcracking model in fatigue.