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Behavior of metallic foam under shock wave loading
Matej Vesenjak, Matej Borovinšek, Zoran Ren, Seiichi Irie, Shigeru Itoh, 2012, izvirni znanstveni članek

Opis: In this manuscript, the behavior of metallic foam under impact loading and shock wave propagation has been observed. The goal of this research was to investigate the material and structural properties of submerged open-cell aluminum foam under impact loading conditions with particular interest in shock wave propagation and its effects on cellular material deformation. For this purpose experimental tests and dynamic computational simulations of aluminum foam specimens inside a water tank subjected to explosive charge have been performed. Comparison of the results shows a good correlation between the experimental and simulation results.
Ključne besede: metal foam, shock wave loading, experimental testing, dynamic simulation
Objavljeno: 21.06.2017; Ogledov: 662; Prenosov: 310
.pdf Celotno besedilo (839,46 KB)
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Fracture toughness of heterogeneous energy components
Zdravko Praunseis, 2012, izvirni znanstveni članek

Opis: The presence of different microstructures along pre-crack fatigue fronts has important effects on the critical crack tip opening displacement (CTOD). This value is the relevant parameter for the safe servicing of energy components (penstocks). In the case of specimens with a through thickness notch partly in the weld metal, partly in the heat affected zone and partly in the base material, i.e. using the composite notched specimen, the fracture behaviour strongly depends on the portion of ductile base material, its size and the distribution of the mismatching factor along the vicinity of the crack front.
Ključne besede: fracture toughness, energy materials, experimental testing
Objavljeno: 10.07.2015; Ogledov: 1012; Prenosov: 36
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Evaluation of mechanical properties of soft magnetic materials for axial flux permanent magnet synchronous machines
Zdravko Praunseis, Peter Virtič, 2013, izvirni znanstveni članek

Opis: Accurate determination of real material mechanical properties is important for safe servicing of energy components. The aim of the paper is systematic experimental approach for determination of mechanical properties of high strenght low alloyed steels and mild carbon steel in the rolling, thickness and width direction.
Ključne besede: soft magnetic materials, mechanical properties, experimental testing
Objavljeno: 10.07.2015; Ogledov: 1320; Prenosov: 40
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Review of experimental models for confirmation of mathematical models of gears
Boris Aberšek, Jože Flašker, 2008, izvirni znanstveni članek

Opis: In order to calculate the service life as precisely and reliably as possible we need good mathematical models for describing loading, geometry, properties of materials and fracture mechanics parameters. It can be established whether a mathematical model is precise and reliable only by comparison of results of the method such as analytical methods in case of simple problems and experiment when real complex structure are deal with. Since gears and gearing belong to the second group, by correctly selected and developed test pieces and carefully planned experiments we obtained results with which we confirmed and justified the mathematical model for calculating mentioned parameters. To this end we will show in this paper series of experimental methods and test pieces used on the gears.
Ključne besede: machine elements, gears, mathematical models, testing, experimental methods, numerical analyses
Objavljeno: 07.06.2012; Ogledov: 980; Prenosov: 49
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Review of mathematical and experimental models for determination of service life of gears
Boris Aberšek, Jože Flašker, Srečko Glodež, 2004, izvirni znanstveni članek

Opis: To confirm mathematical models for the determination of service life of gears we developed different nonstandard test pieces and used a combination of mixed experimental methods on them. The aim of these combinations was to obtain as complete information as possible about the individual influences and to detrmine the interaction between different fracture mechanics magnitudes. In this way we confirmed the models as a whole and also determined some physical interpretations in models. With this we were able to ensure that the presented model is not purely a mathematical model.
Ključne besede: machine elements, gears, service life, testing, experimental methods
Objavljeno: 01.06.2012; Ogledov: 1287; Prenosov: 88
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