It is shown in the work that plastic flow solids develops always localized manner. A macroscopic scale ~ 10-2 m characterizes localization. The zones form pattern of strain, which projection autowave processes flow, developing volume, on observed surface tested specimen. One can observe with help speckle-photography method. investigations various materials allowed to establish deformation infor...

The material response discussed in the previous chapters was limited to the response of elastic materials, in particular to linearly elastic materials. Most metals, for example, exhibit linearly elastic behavior when they are subjected to relatively low stresses at room temperature. They undergo plastic deformations at high stress levels. For an elastic material, the relationship between stress...

A data analysis procedure has been developed to estimate the contact area in an elasto-plastic indentation of a thin film bonded to a substrate. The procedure can be used to derive the elastic modulus and hardness of the film from the indentation load, displacement, and contact stiffness data at indentation depths that are a significant fraction of the film thickness. The analysis is based on Y...