Interference fit joints have been widely used in many engineering constructions, in particular in electric motors. It is of particular importance to calculate the load capacity of press-fit joints, especially in the overload ranges of construction to estimate the safety factor. The article presents a FEM numerical simulation of pressing the shaft into the hub, taking into account various types of fits. The results of numerical simulations presented in the article were positively verified with the MTS measuring device, which confirmed the correctness of the numerical model. So far, the load-bearing capacity of press-fit joints has been calculated from Lame’s formulas. The results of the load capacity of the joints obtained by the FEM simulation were compared with the results obtained from Lame’s formula. The comparison shows that when designing interference fit joints, attention should be paid to the fact that the press-in process, depending on the type of fit, may be elastic-plastic. Plastic deformations in the contact zone of the joint affect its load-bearing capacity. Therefore, the design of press-fit joints should not be based on Lame’s formulas, which do not take into account the range of plastic work of the material.

The use of modern measurement techniques and computing methods opens up new possibilities for the calculation and testing of metal structures. This article presents research conducted using measuring set MTS to verify the computational model of the structure of the roof protection on industrial buildings.

Based on the strength tests of porous structure samples printed in FDM technology (fused deposition modeling) from PC/ABS filaments, numerical simulations of bending spring beams for two different filling densities, have been performed. The results of numerical analyzes have been verified experimentally and compared with those obtained with the commercial strength parameters of the raw material used for printing. Conducted and planned studies will allow to develop a methodology for calculating the porous structure created in 3D printing technology.