Article

Received 06.02.2025

Revised 02.06.2025

Accepted 20.06.2025

Retrieved from Vol. 28, No. 1, 2025

Pages 161 -171

Martynov, I., Kalabukhin, Yu., Trufanova, A., & Martynov, S. (2025). Study of stress-strain state of passenger car body. The National Transport University Bulletin: A Scientific and Technical Journal, 28(1), 161-171. https://doi.org/10.32703/2617-9040-2025-45-12

Study of stress-strain state of passenger car body

Igor Martynov Yuri Kalabukhin Alyona Trufanova Stanislav Martynov

The article presents the stress-strain state analysis results of the load-bearing elements of the body and frame of the 61-779 model passenger car. To assess the strength of the car body, the finite element method was used with the ANSYS software package. In the model, the body is represented as a system consisting of beam, shell, and solid finite elements. The connections are modeled using rigid links. The model  contains  a  total  of  890,436  nodes  and  321,874  finite  elements.  Boundary  conditions  include restrictions  of  freedom  in  support  nodes  (fixed  support)  and  applied  external  loads.  The  main  load-bearing  element  of  the  car  structure  is  the  center  sill,  made  of  I-beam  profile  No.30.  Additional fastening elements are used to increase the stiffness of the connections between the center sill and the crossbeams. The sheathing is made of structural and stainless sheet steel. Corrugated metal 2 mm thick is  used  as  the  outer  sheathing.  A  study  was  conducted  on  the  stress-strain  state  of  the  car  body with nominal dimensions. The highest stress under  load occurs in the bolster beam at the point of contact with  the  end  beam  of the  frame  and  amounts  to  258 MPa.  The  stress  in  the  body  sheathing  between window openings is 65 MPa. The results obtained will further determine the direction of research on the optimization of load-bearing structures of the frame and body

railway transport; passenger car; body; reliability; load; wear; stresses; optimization
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https://doi.org/10.32703/2617-9040-2025-45-12