This article is devoted to the stress strain research of a biomechanical system formed by the tibia, fibula and muscles under external stress (axial compression). In this study an anatomically accurate geometric model of human bones was developed based on CT analysis data, which was the basis of the calculated finite element model. A numerical evaluation of the stress strain state was carried out using the Finite Element Method (FEM). The developed model of the tibia and fibula was validated based on the results of axial compression field tests. The analysis of mesh independence of finite element models of the tibia and fibula has been carried out.

The computational study of the fatigue life of car body components and its spot welds was carried out using two methods in this article. Besides, there analyzes the impact of spot welds failure on the stiffness characteristics of the car and a comparison of the sites of breakdown that arose during computer modeling using a digital twin with the sites of a breakdown in a real test. The study resulted in a significant influence of fatigue life on the stiffness characteristics of the car body. This noticeable effect is explained by most of the failed spot welds are located in the areas of the front and rear suspension fastenings, experiencing significant stress both during the car operation and during bench tests for bending and torsional stiffness of the body.

The paper is devoted to the development of a method for optimizing the tread pattern to push aside the water from the road contact patch. This technique works with ready-made tread patterns of any type. Today, the methodology under consideration is relevant, since it prevents the occurrence of one of the most common causes of road accidents - aquaplaning. Currently, it is impossible to eliminate the risk of such an effect. It can only be reduced by slowing down or ensuring a uniform load on all wheels, trying to drive through the puddle with all four wheels.

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In this article we consider a general approach and method to assess the solid data carrier destruction in a shredder using grinding rotors with teeth. Numerical simulation of the grinding process was carried out in the LS-DYNA by discrete element method and finite element method (FEM-DEM). Evaluation and comparison with a real grinding process was based on a phenomenological approach.