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Explicitní MKP analýza nárazu lidské lebky na tuhou podložku
Jiroušek, Ondřej
Article deals with explicit finite element modelling of contact conditions of human head impacting a flat rigid surface. For this purpose, detailed 3-D model of human skull and brain was developed based on a series of computer tomography scans of resolution 512x512 pixels taken at 1 mm distances. The FE model of human skull was filled with simplified model of human brain. The brain is modelled as a homogeneous viscoelastic material. A case study of low-velocity impact to different regions of the human head (e.g. frontal impact and impact in the occipital region) is also modelled.
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Measurement of nucleation rate in corrossive mixtures
Krejčí, A. Petr
For a complete description of two-phase flow a basic informationabout liquid phase formation is needed. The information is fulfilled in terms ofnucleation rate and its dependency on quantities characteristic for gas-phaseflow. One of devices used for measuring of nucleation rate in multi-componentsystems of vapors and gases is a shock tube. Unique modification of this devicedesigned for measuring in chemically aggressive mixtures is described.
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Od zpívajících telegrafních drátů k teplotnímu řízení úplavu
Trávníček, Zdeněk
Vortex shedding from a bluff body is a classical problem for fluid mechanics. Since the time of Prof. Strouhal at the end of the 19th century, the phenomenon has been frequently studied. This contribution introduces (1) the historical context, (2) motivations and goals of the recent investigations, and (3) recent original results of research on the fluid dynamics and heat transfer of heated and cooled cylinders in the cross-flow, obtained mainly in the Institute of Thermomechanics.
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Stress-strain analyze of en elbow joint
Hlavoň, Pavel ; Fuis, Vladimír ; Florian, Z.
Summary: In traumatology demolition of elbow joint there are in many cases, where the surfaces of the joint are damaged. These parts of the joint have been removed during the operation. Function of the joint isn’t away but it nevertheless causes a really strong pain in the patient’s wrist. There is mentioned in the paper stress-strain analyze of the elbow joint in FEM and also geometric model of partial aloplastic for proximal part of radius.
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