Physical fundamentals of mesomechanics of plastic deformation and fracture of solids

The conventional description of the relationships governing the plastic deformation and fracture of solids is carried out using two approaches: 1) Continuum mechanics 2) Dislocation theory. The continuum mechanics describes the behaviour of material under load using integral characteristics of the medium. In this approach, the internal structure of the material is not taken into account, stress and strain tensors are symmetric and plastic deformation is carried out only by the translational movement of defects under the effect of stresses. The plastic yielding curve is described by calculating strain hardening above the yield point of the material. The phenomenological approach of the continuum mechanics is physically and mathematically completely correct, but it may be used only for describing the integral properties of a macrohomogeneous mediumTranslated from Russian (Fiz. Mezomekh. Mater., Nauka, Novosibirsk (SU) 1999 p. 1-28)Available from British Library Document Supply Centre-DSC:9023.190(10230)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo