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2 2014

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Probabilistic assessment of beams rested on an elastic foundation

Michenkova S., Theisz G., Frydrysek K.

Modelowanie Inżynierskie

2014

T. 21, nr 52

118-125

This article deals with the application of the Method of Initial Parameters (MIP) for a straight beam rested along its entire length on an elastic foundation. It presents the derivation of relationships and analytical solutions for one example according to the 1st-order theory (i.e. bending and thermal stress). A deterministic and probabilistic approach is implemented – i.e. the application of the Simulation-Based Reliability Assessment (SBRA) Method (Monte Carlo simulations and probabilistic reliability assessment).

On engineering verifications of external and internal fixators for traumatology and orthopaedics

Frydrysek K., Ucen O., Fojtik F., Poruba Z., Theisz G., Sejda F., Michenkova S.

Modelowanie Inżynierskie

2014

T. 21, nr 52

42--50

In this article the authors draw attention to the possibilities of treatment for complicated bone fractures. They present their own design, laboratory tests and numerical solutions (i.e. strength analyses and reliability assessments) of the various types of internal and external fixators applied in traumatology and orthopaedics (i.e. intended for fractures of limbs, pelvis and calcaneus). The new design of external fixators is based on the development of Ilizarov and other techniques (i.e. shape and weight optimization based on composite materials, application of smart materials, nanotechnology, low x-ray absorption, antibacterial protection, patient comfort, reduction in the duration of surgical treatment, and cost). Similarly, the new intramedullary nail C-NAIL (i.e. an example of an internal fixator) is intended for minimal-invasive fixation of intra articular calcaneal fractures.