Keyword: «branching»

One of the little-studied problems of modern mechanics and the physics of fracture is the branching of the crack, which is observed in materials of a different nature. To experimentally determine the rate of crack branching velocity in steels, a series of tests were carried out on the fracture by internal pressure of steel thin-walled cylindrical shells (vessels) with measuring of the crack velocity by the method of breaking the conductive strips. A measurement setup was created on the basis of a precision converter “Tercon” signals of resistance thermometers and thermocouples, connected to a computer. Measurements of the crack velocity were carried out with a rectilinear crack propagation and crack branching.

the article substantiates a methodological model for developing algorithmic thinking of fourth-graders in mathematics lessons through a system of tasks focused on sequencing, branching and repetition. The paper shows that these structures transform mathematical activity from imitation of a sample into conscious construction of a solution method. Criteria for assessing algorithmic thinking are described, and specific types of tasks and methodological conditions for their use are proposed.