National Repository of Grey Literature 21 records found  previous11 - 20next  jump to record: Search took 0.00 seconds. 
Stress waves in thin strips with geometrical inhomogeneities
Zemčík, R. ; Červ, Jan ; Laš, V.
Stress wave propagation in thin strips under in-plane impact loading is studied by FEM. The influence of slits on wave spreading is investigated as well.
Non-stationary stress state of transversally loaded thin and thick plates
Valeš, František ; Pelikán, Vladimír ; Volek, J. ; Červ, Jan
The solutions of non-stacionary stress state of thick and thin plates transversally loaded on one of their faces are described. By results comparison, the validity limits of thin plate approach can be found. The solution of the thick plate is based of quations of motion of 3D continuum; using basic models from the Kirchhoff to Timoschenko-Mindlin ones the thin plate solutions are obtained.
Plastic zones and anisotropy effects on wave propagation in rods and strips
Valeš, František ; Červ, Jan ; Pelikán, Vladimír ; Lašová, V. ; Laš, V.
Study of stress wave interactions with plastic zones in isotropic rods made of elastic-plastic material. Anisotropy effects on stress wave propagation in elastic orthotropic strips with geometrical inhomogeneities.
Numerické a experimentální řešení napjatosti modelu kontejneru při pádové zkoušce /Z 1282/00/
Valeš, František ; Tikal, B. ; Nonner, Pavel ; Veselý, Eduard ; Červ, Jan
Results of experimental and numerical research of a container stress state caused by both container fall on a steel plate and ball projectile shooting on one of container faces.
Transonic twinning from the crack tip /Z 1281/00/
Červ, Jan ; Landa, Michal ; Machová, Anna
Molecular dynamic simulations in bcc iron show that transonic twinning from the crack tip is possible at low temperatures. The speed of twin expansion is larger than the velocity of shear stress waves along the slip systems <111>{112} in a perfect bcc iron crystal.
The study of dispersive properties of media dsicretized by LISA-2D code
Ježdík, Roman ; Červ, Jan
Dispersional and anisotropic properties of media discretized by LISA-2D code are studied.
Stress waves in discs with selected sorts of geometrical inhomogeneities
Červ, Jan ; Valeš, František ; Landa, Michal
There were studied stress waves in discs with selected sorts of geometrical inhomogeneities.
Harmonic wave propagation in transversaly isotropic plates
Červ, Jan ; Valeš, František
Propagation of harmonic plane wave in transversaly isotropic plates was studied. It was shown that under given assumptions the given wave can propagate as quasitransverse wave. Dispersional and directional properties were found out as well.
Numerical and experimental solving state of stress of container model at fall exam
Valeš, František ; Tikal, B. ; Veselý, Eduard ; Nonner, Pavel ; Červ, Jan
Results of experimental and numerical analysis of the stress state of a container, caused by a perpendicular fall and projectile hitting in high speed its front, with which the container falls onto the ground. Numerical analysis (FEM) and the experiment (based on the use of semiconductor tensometers in connection with a measuring device)proved both very good correspondence and also that adopted approach was right and both the methods can substitute one another.
Napjatost tenké ortotropní elastické desky zatěžované příčně působícím pulsním obtížením
Valeš, František ; Volek, J. ; Červ, Jan
The analytical solutions based on Kirchhoff and Rayleigh approximations of a thin elastic orthotropic plate under transverse impulse load are discussed in the paper. The results are compared with those obtained by means of FEM.

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