11 KB173 KB10 KB199219991999Emri, IgorKralj, AlešProdan, Ted3 straniletnik:33številka:6str. 527-529ISSN:1318-0010COBISSID:207274URN:URN:NBN:SI:doc-8B187P37enInštitut za kovinske materiale in tehnologijeŽelezarna JeseniceŽelezarna RavneŽelezarna ŠtoreKovine zlitine tehnologijeaparaturemehanske lastnostimerjenjepolimeritlakApparatus for time-dependent measurements of mechanical properties under hydrostatic pressure| Naprava za časovno-odvisne meritve mehanskih lastnosti pod hidrostatičnim tlakom|Although high hydrostatic pressure commonly appear in demanding structural applictions and during several manufacturing processes, there is little information available about their effect on material properties. This is because, world-wide, very few instruments exist that can measure the effects of hydrostatic pressure on mechanical properties. Fillers, Moonan and Tschoegl built such an instrument several years ago. We have improved and upgraded this apparatus with the intention of researching the influence of pressure and temperature on the mechanical properties of time dependent polymeric materials. In this study, special emphasis is put on the Filles-Moonan-Tschoegl (FMT) model, which can describe the combined effect of temperature and pressure. The model is based on the time, temperature and pressure superposition principle, for which parameters are obtained using the presented apparatus. As an example we present measurements on PVAc for bulk creep compliance and shear relaxationČeprav se visok hidrostatični tlak pojavlja v zahtevnih konstrukcijskih uporabah in pri več predelovalnih procesih, je še vedno zelo malo znanega o vplivu tlaka na lastnosti materialov. To je zaradi pomanjkanja naprav za meritve vpliva hidrostatičnega tlaka v svetovnem merilu. Fillers, Moonan in Tschoegl so prd leti zgradili takšno napravo. To napravo smo sedaj prenovili in jo izboljšali z namenom, da bi z njo merili vpliv tlaka na časovno-odvisne mehanske lastnosti polimernih materialov. V tej študiji je poseben poudarek na Filles-Moonan-Tschoegl (FMT) modelov, ki lahko popisuje kombiniran učinek temperature in tlaka. Model sloni na časovno-temperaturno-tlačni superpoziciji za katerega parametre dobimo z meritvami na predstavljeni napravi. Kot primer navajamo rezultate meritev volumskega lezenja in strižne relaksacijeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije