Stressed-deformed state of mountain rocks in elastic stage and between elasticity
Journal Title: Вісник Житомирського державного технологічного університету. Серія: Технічні науки - Year 2016, Vol 76, Issue 1
Abstract
The problems of the stress-strain state of rocks in the elastic stage and beyond the elastic limits, and the ways of schematizing the tension and compression diagrams were reviewed in the article. To simplify calculations outside the elastic range, the tension (compression) diagrams are usually schematized, i.e. are replaced by curved smooth lines having a fairly simple mathematical expression and at the same time well coinciding with the experimentally obtained diagrams. When diagram is to be schematized, it is necessary to take a constant temperature of superheated water steam if a rock test is planned in a relaxed form. Note that when the diagram is schematizing, the difference between the limits of proportionality and fluidity is erased. This allows the limit of proportionality to be considered the limit of fluidity. Schematicization can be carried out in the area where the tensile strength (compression) is planned to be destroyed with the established weakening of rocks by exposure to water steam or chemical reagents. Samples of rocks in natural form were tested and weakened by means of superheated water steam (220 °C and more) and chemical reagents for tension and compression. The data are obtained, the diagrams of deformation are constructed and schematized in the elastic stage and beyond the elastic limit. Based on the schematic diagrams of deformation, the components of stress and strain were composed in the elastic stage and beyond the elastic limit. It is established in the publication that rocks under compression and stretching deform, both within the elastic stage, and beyond the limits of elasticity. This could be seen when the samples, both in natural and in weakened state, with superheated water steam (more than 220 °C) or chemical reagents were tested. In their natural form, they are mainly deformed within the elastic stage and are destroyed as a brittle material, and in a weakened form they can deform beyond the elastic stage and destroy as a plastic material. In the elastic stage, the link between stress and strain is linear.
Authors and Affiliations
A. M. Samedov, V. V. Vapnichna, V. O. Shlapak, O. M. Sidorov
Keywords
Related Articles
- EP ID EP255950
- DOI -
- Views 136
- Downloads 0
Delivery to the method of visible pilopronic materials
The research considers the actual problem of determining the permeability of materials used for the production of personal protective equipment. Having analyzed the methods and instruments for determining the dust permea...
Experimental research on the effect of liquid active filler on the properties of locally manufactured explosives
Different explosives with correspondent charges constructions are used to increase the effectiveness of the explosion in the process of crushing rock masses. Therefore, the development of simple locally manufactured expl...
The solution of the reliability problem in the repair process of the plates of the silica bricks press boxes
The research analyzes recommendations existing in different sources of information for the choice of methods of strengthening and reconditioning of worn machine parts. These methods include: the method of electric arc de...
The improvement of the level of the operating conditions of road trains on a basis of a qualimetry model
The qualimetry model of the level of the operating conditions of road trains is considered. It establishes the nomenclature of quality indicators based on the analysis of the conclusions of experts about the impact of fa...
Determining the optimal loads on mechanism nodes using digital technology prototype
This article gives us important details about applying of a digital prototype for the purposes of reduction drive assembly testing. Working with digital prototype helps every user to make detailed virtual research, to es...