Experimental study of limit stress-strain state quasi-brittle material using correlation techniques digital images

Receiving experimental data (set of values a component of a tensor of deformations corresponding intense to the deformed condition in a point of the maximum concentration of deformations for plates with a pro-point of various orientation), criteria of durability necessary for creation, by means of contactless three-dimensional digital optical system and a method of correlation of digital images, a pilot study of the limit intense deformed condition of a quasifragile material, namely the plexiglas, previous destruction is considered. Evolution of non-uniform fields of deformations in bodies with concentrators is investigated, the analysis of a configuration of non-uniform fields of deformations in samples with concentrators is carried out. In this paper the author is registered are the longitudinal and transverse strain using the optional software video "virtual extensometer", a reflection of the main advantages of "virtual extensometer." The high efficiency of digital optical system to study the stress-strain state of the material quasibrittle the mathematical apparatus of the system is based on digital image correlation method.