Micromechanisms of Fracture and Fatigue In a Multiscale Context

bkdzxl

Micromechanisms of Fracture and Fatigue In a Multiscale Context - Jaroslav Pokluda、


Classical concepts and numerical methods of mechanical engineering such as,
for example, fracture mechanics and finite element analysis focus on macro-
scale problems where the microstructure is incorporated by using averag-
ing constitutive laws. On the other hand, the domain of materials science
and solid state physics focuses on investigation of atomic bonds, lattice de-
fects, microstructuralelements and theirinteractionsat nano,microandmeso
scales. However, a recent development in fracture and fatigue research clearly
indicates that the most promising and effective concepts are based on cou-
pling engineering mechanics with materials science within so-calledmultiscale
fracture models. The objective of these approaches is to bridge the enormous
gap between time and space scales and, therefore, they constitute a great
challenge in the sense of scientific knowledge. Moreover, they still drive at
psychological barriers of conservative mechanical engineers and/or material
scientists. Therefore, an overwhelming majority of books about fracture and
fatigue were written from the point of view of either mechanical engineers
or material scientists. To our knowledge, a pioneering attempt to produce
a successful integrated concept of fracture was made by Kelly and Macmil-
lan [1]. Since that time, however, many new methods and concepts have been
developed which should be incorporated into advanced multiscale models of
fracture and fatigue.

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xianjiaoda

kankan, thanks