Experimental studies of mechano-rheological model simulating shock interactions

Lapshin, V. L.; Rudykh, A V

doi:10.1109/icieam.2017.8076457

Cited by 3 publications

(3 citation statements)

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“…Dynamic loads are dangerous, as they can reach large values and destroy the structures. Therefore, many scientific works are aimed at mathematical and physical modeling of the processes of interaction of bodies and mechanical systems under dynamic loads [1,2,[19][20][21][22][23].…”

Section: Problem Statementmentioning

confidence: 99%

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A Study of the Effect of Impact Speed on the Dynamics of Mechanical Interactions of Bodies

Lapshin

2022

KEM

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The mechanorheological viscoelastic plastic model was used to study the effect of impact speed on the dynamics of mechanical interaction of a spherical body with the surface. An analysis of the impact process made it possible to draw some conclusions. The impact interaction time depends on the impact speed and mechanical properties of the material. The impact time decreases with an increase in the impact speed, a decrease in plasticity, and an increase in elasticity. With an increase in the impact speed, the impact time decreases. During the experiment, the initial impact speed increased 10 times. During the impact interaction, the body deformation increased 6-7 times. According to the calculations, the average body deformation speed also increased 10 times. As a result, the time for travelling a distance equal to the elastic and plastic deformation when loading bodies and the elastic deformation when unloading bodies decreased. The total deformation is composed of elastic and plastic components. With an increase in the impact speed, the plastic component increases, which decreases the unloading time due to a decrease in the elastic component. The impact time is an important characteristic of the dynamic process of interaction. Therefore, when identifying theoretical models to the real processes, these parameters should be congruent. To improve the modeling accuracy and reliability for various technological processes under dynamic loads, it is necessary to take into account various factors.

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Section: Problem Statementmentioning

confidence: 99%

“…To describe the dynamics of interaction of mechanical systems, the mechanic rheological model is often used [1,[23][24][25][26][27][28]. The dynamics of movement of the models is analyzed using differential equations.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Effect of Impact Speed on the Dynamics of Mechanical Interactions of Bodies

Lapshin

2022

KEM

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“…Therefore, it is important to simulate and study dynamic processes in order to calculate and optimize structures and systems. These issues are analyzed in many researches [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Influence of Elastic–Plastic Transformation of Mechanorheological Model on Impact Duration

Lapshin

2018

Proceedings of the 4th International Conference on Industrial Engineering

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To study dynamics processes, a mechanorheological viscoelastic-plastic model has been developed. It includes elastic, viscous, and plastic elements. Based on the experiments, a method designed to calculate the values of impact parameters was developed. A simplified model behavior was analyzed. It was assumed that under impact interaction, the model is viscoelastic-plastic since the beginning of the impact process, i.e., plastic deformations occur simultaneously with elastic ones. However, the experiments showed that at the loading stage, elastic deformations can occur as well. Under certain conditions, when stresses reach a yield point, plastic deformation occurs. The value of a control force for early development of plastic deformations can influence the duration and other parameters of the dynamic impact process. The experiments demonstrated that at the loading stage, the viscoelastic model becomes transformed into the viscoelastic-plastic one which increases the impact duration. It might be due to the fact that total deformations increase significantly owing to the plastic model component. As a result, the model motion value increases as well. Impact braking acceleration decreases, which leads to an impact duration increase. According to the results of the impact process research, the following conclusions can be drawn: the impact duration is influenced by the elastic-plastic transformation of the model. At the initial stage of plastic deformation, the force value is an important model control parameter influencing the impact duration and movement dynamics. The application of a more generalized model for solving practical tasks will help to increase research and impact interaction simulation accuracy and reliability.

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