RADIOLUCENT COMPOSITES PROVIDING HIGH RESISTANCE AGAINST STERILIZATION DECOMPOSITION

We present a study of radiolucent composite materials for use in medicine, providing suitable mechanical properties and high resistance against sterilization decomposition. The composites are composed of carbon (C), aramid or glass (R-glass) fabrics embedded in polydimethylsiloxane (PDMS), polyetheretherketone (PEEK) or polyphenylene sulfide (PPS) matrix. The effect of multiple steam sterilization processes on degrading the mechanical properties, structural integrity and hydrolytic decomposition of the composites was verified. The radiolucency of the composites was also investigated. The mechanical performance of ARAMID/PDMS composite is strongly influenced by the sterilization technique that is applied. The mechanical behavior of R-glass/PDMS composite during steam sterilization is negatively influenced by its porosity. The relatively high porosity of C/PDMS composite may lead to lower ultimate bending strength values, but in general its mechanical behavior is influenced only at a low rate by steam sterilization. On the basis of our analyses, we can state that both C/PEEK and C/PPS composites are good candidates for application as radiolucent materials providing resistance against sterilization decomposition

A State of the Art on Railway Simulation Modelling Software Packages and Their Application to Designing Baggage Transfer Services

There is a new baggage transfer service suggested in Newcastle Central Station. In order to prove that this service is feasible, a simulation model can be developed to test the concept and operating pattern behind. For the purposes of this paper, we intend to organize a literature review on simulation modelling software packages employed to study service design. Specifically, this paper has compared five different simulation software packages used by the railway industry to study service-related challenges. As a result, it is suggested that SIMUL8, a macroscopic discrete event-based software package, should be used among the five compared ones because of its simplicity and the ability to give practical results for the design and performance of such a baggage transfer system

Optimalization method of EMI power filters and its measurement

One of the most important problems solved nowadays is the improvement of the electronic systems immunity. This paper deals with the modelling and synthesis of EMC power filters. This is very important in the field of the electromagnetic compatibility and EMC filter design and optimisation. Various types of EMC filters are discussed. Idea of the synthesis and optimisation of EMC filters is illustrated on example. Results of our synthesis of EMC filter are shown at the conclusion

Experimental and numerical evaluation of composite part strength

project FV30033 of the Ministry of Industry and Trade of the Czech Republic and by the Grant Agency of the Czech Technical University in Prague, under grant No. SGS18/175/OHK2/3T/1

Development of composite element joining keel beam and aircraft fuselage

This work has been supported by project FV30033 of the Ministry of Industry and Trade of the Czech Republic and by the Grant Agency of the Czech Technical University in Prague, under grant No. SGS21/151/OHK2/3T/1