**5. Conclusion**

This study was carried out to find methods for quantitatively confirming the durability of the product during the increasingly diverse production process. And, the cylinder block in which the bushing was inserted for seizure was selected as the standard product. As a result, it was possible to establish durability assessment methods and processes for machine parts where large residual stress is generated by shrink fit during production process. The results of this study will contribute to the durability assessment considering the residual stress of machine parts which does not change the material structure due to thermal energy input unlike welding.

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In addition, this study examined existing durability assessment methods and confirmed the merits and demerits of evaluation methods. Based on these advantages and disadvantages, this study also presented limitations of the durability assessment method considering the residual stresses presented. This will prevent indiscreet use by specifying the use environment of the durability assessment considering residual stress as a result of this study. In addition, a verification method is proposed to use the simulation for complex shapes and to ensure the reliability of the simulation results. This will provide efficient development and forecasting directions for the industry unlike current development of shrink fit that has been developed depending on existing people and facilities.
