Article

Received 11.01.2026

Revised 09.02.2026

Accepted 26.03.2026

Published 07.04.2026

Retrieved from Iss. 119, 2026

Pages 37 -49

Dragobetskyi, V., Moroz, M., Moloshtan, D., Chernysh, A., & Nikitina, A. (2026). DEVELOPMENT OF A METHOD FOR DETERMINING PLASTIC DEFORMATIONS OF VEHICLE BODY PARTS DURING COLLISION. Automobile Roads and Road Construction, 119(1), 37-49. https://doi.org/10.33744/0365-8171-2026-119-037-049

DEVELOPMENT OF A METHOD FOR DETERMINING PLASTIC DEFORMATIONS OF VEHICLE BODY PARTS DURING COLLISION

Volodymyr Dragobetskyi Mykola Moroz Dmytro Moloshtan Andrii Chernysh Alyona Nikitina

The study is relevant because it aims to improve the accuracy of automotive technical expertise in road traffic accidents, which directly affects the objectivity of establishing collision circumstances and determining vehicle speed parameters. Existing methods for assessing plastic deformations of body parts are mainly based on static approaches that do not account for the dynamic nature of impact loads and the inertial properties of materials at the moment of collision. This leads to significant errors in determining the energy parameters of impact and reconstructing the mechanism of road traffic accidents. The purpose of the study is to improve the method for describing the deformation and destruction processes of vehicle structural elements resulting from impact loads during collisions. The work aims to increase the accuracy and objectivity of automotive technical expertise by refining approaches to determining plastic deformations of vehicle body panels, taking into account modern requirements for road safety and the need for accurate reconstruction of traffic accident mechanisms. Object of research – the process of public participation in project management. Subject of research – regularities of plastic deformation of vehicle body parts, taking into account dynamic characteristics of materials, inertial properties, and energy balance of the system under collision conditions. Research methodology. The study employs a comprehensive approach based on phenomenological theory, methods of deformable solid mechanics, and plasticity theory. For the mathematical modeling of material behavior under dynamic loading, Ritz analytical methods and the second-order Lagrange equations were applied. The methodology includes analysis of the system's energy balance, accounting for the work of external forces, stress intensity, degree of deformation, and material volume. The experimental part is based on impact tests (bending, tension, compression) to study the mechanical characteristics of metals in dynamic mode, particularly using the elastic rebound method to determine the hardness of deformed metal. Classification of body panels was also conducted according to curvature type and contour (single- and double-curvature elements, closed and open contours).

automotive technical expertise, destruction, deformation, phenomenological theory, hardness, vehicles, road safety
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https://doi.org/10.33744/0365-8171-2026-119-037-049