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Engineering ProceedingsEngineering Proceedings
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  • Proceeding Paper
  • Open Access

17 July 2025

14 Pages

Numerical Modeling and Analysis of Fatigue Failure in 42CrMo4 Steel Pivot Bolts at Different Heat Treatments †

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1
Department of Mechanics, Faculty of Mechanical Engineering, Technical University of Sofia Branch Plovdiv, 25 Ts. Diustabanov Str., 4000 Plovdiv, Bulgaria
2
Center of Competence “Smart Mechatronic, Eco- and Energy-Saving Systems and Technologies”, 4000 Plovdiv, Bulgaria
3
Institute of Mechanics—Bulgarian Academy of Sciences (BAS), Acad. G. Bonchev St., bl. 4, 1113, Sofia, Bulgaria
*
Author to whom correspondence should be addressed.
Eng. Proc.2025, 100(1), 52;https://doi.org/10.3390/engproc2025100052
This article belongs to the Proceedings of The 14th International Scientific Conference TechSys 2025—Engineering, Technologies and Systems
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Abstract

This study presents a numerical model for analyzing fatigue crack growth in 42CrMo4 steel pivot bolts under different heat treatments and service loads. The finite element method (FEM) in the ANSYS Workbench environment (version 2019R1) (SMART Crack Growth), along with algorithms based on Paris’s law implemented in MATLAB (version R2016a), was used. The results highlight the significant influence of heat treatment on fatigue resistance and serve as a basis for optimizing design parameters and improving the durability of the structural components.

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