An analysis of existing finite element models of welded and riveted joints used in impact load calculations has been conducted. An improved joint model based on beam elements, which accounts for the influence of strain rate on the failure process, is presented. The model parameters are defined and justified based on a set of experimental data obtained at various loading rates. The advantages and disadvantages of the proposed model are compared with existing analogues. Simulation was carried out using the LS-DYNA software package. It has been established that the new model provides high accuracy in predicting failure (error less than 5%) with a significant reduction in computational costs. Based on the verification results, the model is recommended for use in optimization calculations of vehicle body structures to improve passive safety. To achieve the required accuracy, it is necessary to account for the dependence of the joints' strength characteristics on the strain rate and to use a simplified failure criterion based on forces and moments.

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