In recent years, plastic and metal 3D printing has experienced massive development in the professional and hobby spheres, especially for rapid prototyping, reverse engineering, maintenance and quick repairs. However, this technology is limited by a number of factors, with the most common being the cost and availability of the technology but also the lack of information on material properties. This study focuses on investigating the material properties of PLA, PETG, HIPS, PA, ABS and ASA in order to elucidate their behavior in terms of wear and thermal resistance. The research builds on previous studies focusing on the mechanical properties of these materials and includes wear testing and DMA analysis. Weight loss, frictional forces, and frictional work including relative frictional work are recorded as part of this testing. The storage modulus and loss modulus including tan(δ) were then measured using DMA.

This paper deals about experimental determination of changing the axial load in the bolts of the clamping sleeve under its axial load. Inspiration for this experiment was FEM analysis clamping sleeve in Ansys workbench. Changing of the axial load in the bolts is very important for fatigue of bolt. Bolt force and pretension is necessary for transmit axial load and torque. the change occurs when the sleeve is loaded by the axial force.

This paper follows the results of measurements carried out on trucks of different types. The emphasis is on the load on the cardan shaft and the variation of this load with its length. The effect of the angle between the shafts on the magnitude of the load torques is also investigated. In addition, attention is paid to the determination of the forces acting on the designed frame of the experimental equipment. These forces are used as input to the FEM analysis. FEM analysis considers the effect of these forces on the behavior of the frame as well as the magnitude of acceleration at specific locations. The evaluation is determined by combining the results obtained by the analytical approach and the FEM.

At present, the unevenness of the cardan shaft, more precisely the Hook joint, can be described mathematically. This formulation of the non-uniformity is based on the knowledge of the angular velocity of the drive and driven shaft. However, there is no real understanding of how the non-uniformity affects the behavior of the drivetrain, in particular the vibration of the drivetrain. This paper describes an experiment that may shed light on this problem. Another contribution of this research could be to investigate how the length of the cardan shaft affects drivetrain vibration.

Modern industry should apply modern design in the construction of production facilities. This is typically the case with belt production, where parts are moved towards the worker, or when moving parts from the factory to the warehouse and shipping area. There is a relatively high energy consumption associated with moving these parts. The size of the consumption is mainly determined not only by the size of the transported components and the transport technology, but also by the design of the hoppers used for transport. One way to reduce material handling costs is to make the equipment used for moving parts more efficient. A more efficient carrier should, above all, be lighter. Topological optimization can serve very well for this weight reduction. Of course, the reduction in weight not only has an effect on lower power consumption, but also on the wear of other components. Hence, later in this article, we try to quantify these impacts and assess how much benefit the use of a modern designed carrier can bring. It is also important to consider the cost of producing new carriers versus modifying existing ones. The paper describes the application of the modern designed carrier and compares it with the existing carriers as well as modified existing carriers.

This paper deals with design problematics of a clamping joint for the tanker frame in a rail vehicle. This car body is made from aluminum alloy. The main requirement of the joint is safe transmission the load given by the norm ČSN EN 12 663-1. At the beginning of the study is make the analysis of friction properties on individual contact surface. Below problematics calculation of a stiffness joint components. Using these input data is calculation minimal bolt pretension in the connection. Next part is determining inputs for joint strength check.