Structural analysis using the finite element method is an integrate part of the design process for many components. The existing commercial software still fails to provide adequate support in the last phase of the analysis when design candidate needs to be evaluated and improved. The prototype of an intelligent rule-based consultative system was developed to provide an advice supporting analysis-based design improvement process. Although the article was actually published in spring 2009 it was included in the last issue of the year 2008.
COBISS.SI-ID: 12734742
The chapter focuses on the dynamic behaviour and characterization of metallic hollow sphere structures that constitute an innovative group of lightweight materials. The chapter explains the methodology and results of computational experimenting to clarify and determine the individual influences on the macroscopic behaviour of MHSS, especially under uniaxial dynamic loading conditions. Furthermore, the influence of gas inside the metallic spheres on behaviour of metallic hollow sphere structures and their capability of impact energy absorption is addressed.
COBISS.SI-ID: 13350934
The effect of residual stresses on the fatigue crack propagation was analysed for a loading regime close to threshold stress intensity factor range. Fatigue crack propagation experiments were performed on single edge notched bending specimens machined from a welded plate. By using some simplifications it is possible to estimate the limit values of the stress intensity factor induced by the residual stresses. at selected regions.
COBISS.SI-ID: 13792534
The influences of a crack in a single-stage gear unit on produced vibrations are presented. Different methods are used to analyse signals acquired by experiments. Signal analysis has been carried out in relation to a non-stationary signal, using the family of Time Frequency Analysis tools, such as Wavelets Analyses. Typical spectrogram and scalogram patterns resulting from reactions to faults or damages indicate the presence of damages in a very reliable way.
COBISS.SI-ID: 13206806
The paper deals with the research on the influence of different thread type on the piston rod fatigue life. Previously used piston rods used M74 × 3 threads, but redesigned rods are compromising M76 × 2. Due to changes in thread type the supplier was convinced that changes will affect lowering stresses in thread core which is true, but they have overlooked the fact that lowering the pitch will also lead to lowering the thread root radius which leads to the significant rise of stress concentration and therefore lower the fatigue life.
COBISS.SI-ID: 13006870