Computer modeling of dynamics of damage cumulation in the ductile matrix of a fiber-reinforced composite

Autor: A. V. Ivanov, A. I. Mel'ker
Rok vydání: 1988
Předmět:
Zdroj: Mechanics of Composite Materials. 23:682-685
ISSN: 1573-8922
0191-5665
DOI: 10.1007/bf00616787
Popis: On the basis of the present results together with other previously obtained data [12, 14, 15, 18, 19] it can be assumed that the problem of deformation and failure [20, 21], which is often reduced to explaining the problem of whether failure is the result of deformation or its cause, has resulted from attempts to transfer the macroconsiderations of continuum to the atomic discrete level where the strain (shear accumulation) and failure (cumulation of ruptures) are interrelated to such an extent that their contraposition is of artificial nature. For example, the fluctuation rupture of the bond on the free boundary of the crystal causes formation of a dislocation and shearing [15], and shearing in the form of twinning leads to rupture of bonds and formation of a crack nucleus (see Fig. 1c). For analysis of failure, it is at present insufficient to use only dislocation [22] or only kinetic [21] considerations. As mentioned in [20], in the physics of failure it is necessary to examine all the objects examined in the physics of plasticity and, in addition to this, even more complicated objects. Attempts to simplify the problem proved to be unsuccessful and, consequently, the correct method of solving the problems of the physics of strength should be based on developing the methods of physics of strength up to analysis of atomic mechanisms of damage cumulation [20]. Molecular dynamics represents such a method of examining failure which makes it possible to change to the atomic level [10].
Databáze: OpenAIRE
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