The paper deals with a static and fatigue strength criterion based on the theory of the reference normal and shear stresses – see Fuxa, J. (2003) and Fuxa, J. (2004). T [...]

Paper considers the task of forecasting of individual remaining resource of metal wares of bridge cranes when their life time corresponding to norm is elapsed. Decision o [...]

A two-parameter fracture mechanics method is applied to small cracks near a stress concentrator. The small crack in the present contribution is considered as crack influe [...]

Fatigue is a process of permanent progressive changes in the structure of a material exposed to cyclic loading. This paper describes the strain development in concrete st [...]

The fatigue crack growth rate in the Eurofer 97 steel was measured by two different methodologies. Small crack growth data were obtained using cylindrical specimens with [...]

The manufacturing program of ZDAS, a.s. includes the straightening machine of XRK type. The XRK 2-180 straightening machine is an energy-intensive one. Within the framewo [...]

This paper deals with alternative techniques how to get the velocity signal that is needed for the velocity feedback loop. Common implementation of obtaining the velocity [...]

This paper presents a simulation of 3D curved crack propagation in a steam turbine blade lock. These fatigue cracks are often initiated near a blade root contact zone. Tw [...]

Selected approximation curves of mechanical-fracture parameter values − modulus of elasticity, effective fracture toughness, specific fracture energy, compressive cube [...]

Abstrakt: Článek se zaměřuje na řešení torzního testu pro krátký ocelový vzorek. V průběhu řešení bylo respektováno uchycení v čelistech zkušebního s [...]

A 3D elastic-plastic FEM model with small strains was used for simulation of the deformation mechanics at the curved front of the planar fatigue crack growing in the thic [...]

The paper presents the results of the computational modelling of the stress states in the ceramic head of the hip joint endoprosthesis. The analysed system is loaded acco [...]

It is shown that a system with counter-current in- and outflow (U-type flow) in heat exchangers can lead to an even distribution in branched systems with given high tempe [...]

Machine parts with non-conformal contact surfaces frequently operate in elastohydrodynamic or mixed regime of lubrication. In surroundings of asperities significant chang [...]

Structures operating at high temperatures are damaged by creep processes. If the structure is also subjected to cyclic loading, the fatigue damage is usually significant. [...]

Abstrakt:

Cyclic tests with the maximum force in a cycle Fmax = 5,5 kN and the cycle asymmetry ratio R = F min / F max = 0, 1 were carried out on fiat specimens of 5mm in thickness [...]

Wind excited vibrations of slender structures such as towers, masts or certain types of bridges can be reduced using passive or active vibration absorbers. If there is av [...]

The article is a contribution to numerical simulations of pitting arise phenomena on the gear teeth. The basic assumption of the presented simulations was that pitting (p [...]

The paper is devoted to the analysis of the contact stresses and contact fatigue, especially at the rolls of rolling mils and railway wheels. The experimental and analyti [...]

This contribution presents a simple numerical model for crack growth under mode-I compressive fatigue loading. Residual tensile stress at the crack tip, which is responsi [...]

This article is focused on the computational solution of the material tests and their evaluations. Problem deals with torsion low-cycle fatigue tests of steel specimens. [...]

This article shows: 1. Some studies of a low-cycle material fatigue caused by cyclical contact between two spheres with the same diameters. The spheres are made up from m [...]