deformation

The operation of railway rolling stock under high-speed conditions is crucial for Ukraine, as it will increase the throughput and carrying capacity of the railway network and improve the mobility of people in large cities. The dynamic behavior of the pneumatic spring, as the main structural element of the suspension system of high-speed rolling stock, has been studied. It is noted that the issue of the dynamic performance of the pneumatic spring is of broad scientific interest, as it directly affects the dynamic indicators and safety of the rolling stock when interacting with the track.

The article discusses the improvement of the digital image correlation (DIC) method for analyzing deformations in RC beams, specifically focusing on the importance of zero-strain verification. This step is critical for ensuring high measurement accuracy, as it helps identify and minimize systematic and random errors. Before starting the research, system calibration is conducted, which includes the assessment of background noise and stability that influence the results.

Gear transmissions of various sizes are used in various fields of mechanical engineering, automotive, marine, and aerospace industries according to the needs. This paper presents the modeling and analysis of the modal and harmonic characteristics of a planetary gear transmission for an elbow orthosis. Orthoses are used during the rehabilitation of patients in the postoperative period or during the restoration of lost limb functions. When modeling the planetary gear, the connection elements are made of 45 steel and PLA polylactide.

The goal of the work is to develop a mathematical model of a workpiece bending process by copier to determine the necessary parameters of the process and increase its efficiency. Significance. The quality of the process of workpiece bending by copier depends on many factors and is accompanied by both elastic and plastic deformations. Therefore, a mathematical description and analysis of the workpieces is an urgent issue, because it will allow to justify the parameters of the process and increase its efficiency. Method.

Викладено підхід до розрахунку деформацій та напружень у біметалевій пластині, викликаних зміною температури. Отримані розрахункові залежності є основою при математичному моделюванні біметалевих давачів температури різноманітних конфігурацій та типорозмірів.

The approach to calculation of deformation and stresses in bimetallic plate caued by temperature changes is made. The given calculation of dependence is the basis at mathematical modelling of temperature bimetallic indication of various configuration and typemeasures.

Розглянуто методи моделювання і аналізу просторово-часових деформацій сенсорних мереж. Розглянуто властивості міри близькості отриманих від сенсорної мережі зображень при використанні методу компенсації інформаційних потоків дозволяють зменшити функціональне навантаження на підсистему класифікації.

Shafts of various sizes are used in various fields of mechanical engineering, automotive, marine and aerospace industries to transmit torque according to requirements. In this paper, we simulate and analyse the modal and harmonic response of a shaft on which a satellite of a planetary gearbox for an elbow orthosis is mounted. The orthoses are used during the rehabilitation of patients in the postoperative period or during the regeneration of lost limb functions. Steel 45 and PLA polylactide were used in the shaft modelling.

Polylactide composite materials with organic filler-modifier starch, inorganic filler -calcium carbonate and plasticizer - epoxidized soybean oil for 3D printing have been developed. On the basis of the modular deformation method of calculation the elastic-plastic and deformation properties of the developed modified polylactide materials are determined. The change of modulus of deformation, modulus of elasticity, modulus of high elasticity depending on the composition of the composite is revealed.

Deformation processes in media with fractal structure have been studied. At present, research on the construction of mathematical methods and models of interconnected deformation-relaxation and heatmass transfer processes in environments with a fractal structure is at an early stage. There are a number of unsolved problems, in particular, the problem of correct and physically meaningful setting of initial and boundary conditions for nonlocal mathematical models of nonequilibrium processes in environments with fractal structure remains unsolved.

In this article, there are given the results of studies on the strength of steel-concrete bent elements, in which additional reinforcement was introduced at various levels of initial reinforcement and loading, as well as after unloading, and the beams were brought to destruction. The need for overhead cover reinforcement during the process of its exploitation appears not only in the course of reconstruction but also due to its physical aging that is caused by various factors.