Abstract
To solve problem of structural safety under time-dependent conditions, an algorithm of multi-scale hy- brid mechanics from nano-scale to macro-scales is described. The paper presents an algorithm that links physics of materials with life prediction determined by creep crack growth and addresses practical application which enables predic- tion of fracture to be developed from the science of clarification of mechanism on basis of algorithm. In particular, in order to predict life of real components, importance of link between void mechanics caused by vacancy diffusion (micro mechanical factor), stress tri-axiality, TF (a structural mechanical factor), and material structure (a meso-mechanical factor) is shown in proposed formulation for activation energy of thermally activated process of creep crack growth. A detailed discussion on these issues as well as on algorithm relevant to establishment of law of creep crack growth life based on multi-scale analysis is included ranging from scale of micro damage to structural brittleness.
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