|
| |
|
|
Návrh metodiky výpočtu náhodně zatěžovaných konstrukcí
Svoboda, Jaroslav ; Balda, Miroslav
The report describes results of fatigue tests which have been carried out on flat speciments with the a hole in the middle. Speciments were loaded with three types of random blocks with 20 minutes duration. They mutually differed in a form of the power spectral density (PSD). All the PSDs were of linear form: constant,linearly increasing and linearly decreasing in the frequency range 0-10 Hz. The damage was observed and the metod for estimation of live for arbitrary form of PSD was proposed.
|
|
| |
|
| |
|
| |
|
|
Fatigue Properties of Steels Under Multiaxial Loading
Václavík, Martin ; Svoboda, Jaroslav
Study of combined loading influence to fatigue lifetime of smooth polished specimens made by the material 11523.1. Followed are the stress field changes at various rates of shear and normal loading, and the coherence between the level of particular stress components and specimen fatigue lifetime. Three hypotheses for limit stress computations (HMH, Findley´s and Dang Van's)were verified.
|
|
| |
|
|
Stressing optimization under shortened fatigue tests applications
Svoboda, Jaroslav
Paper sumarizes results of works focused on parameter optimization of the Rešet method of shortened fatigue tests that can be successfully applied to fatigue strength evaluation of dynamically stressed real structures. Works are aimed particularly at so called step loading speed, which significantly influences the test results.
|
|
| |
|
| |
guest ::
