{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-MHL4PK8Y/c43d5be9-34fa-4612-8c8f-967655417699/PDF","dcterms:extent":"146 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-MHL4PK8Y/d0c842cf-816c-409c-b281-44d8e216fffe/TEXT","dcterms:extent":"21 KB"}],"edm:TimeSpan":{"@rdf:about":"2000-2024","edm:begin":{"@xml:lang":"en","#text":"2000"},"edm:end":{"@xml:lang":"en","#text":"2024"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:DOC-MHL4PK8Y","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/urn:nbn:si:spr-ihg6vo21"},{"@xml:lang":"sl","#text":"Materiali in tehnologije"}],"dcterms:issued":"2014","dc:creator":["Bouguettoucha, Abdallah","Haddaoui, Nacerddine","Ibos, Laurent","Rouabah, Farid"],"dc:format":[{"@xml:lang":"sl","#text":"številka:3"},{"@xml:lang":"sl","#text":"letnik:48"},{"@xml:lang":"sl","#text":"str. 315-319"}],"dc:identifier":["COBISSID:1054378","ISSN:1580-2949","URN:URN:NBN:SI:doc-MHL4PK8Y"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"dc:subject":[{"@xml:lang":"en","#text":"Izod impact strength"},{"@xml:lang":"sl","#text":"Izod udarna trdnost"},{"@xml:lang":"sl","#text":"matematično modeliranje"},{"@xml:lang":"en","#text":"mathematical modeling"},{"@xml:lang":"sl","#text":"polikarbonat"},{"@xml:lang":"en","#text":"polycarbonate"},{"@xml:lang":"en","#text":"quenching temperature"},{"@xml:lang":"sl","#text":"temperatura kaljenja"},{"@rdf:resource":"http://www.wikidata.org/entity/Q871335"}],"dcterms:temporal":{"@rdf:resource":"2000-2024"},"dc:title":{"@xml:lang":"sl","#text":"Effect of the quenching temperature on the Izod impact strength of polycarbonate| eksperimentalni podatki in empirično modeliranje| experimental data and empirical modeling| Vpliv temperature kaljenja na Izod udarno trdnost polikarbonata|"},"dc:description":[{"@xml:lang":"sl","#text":"In this study, the development of a mathematical model of the effects of free quenching on the Izod impact strength of polycarbonate (PC) has been investigated. Three different thermal treatments were used: the first quenching from the melt state to different temperatures, the second quenching from Tg + 15 °C and, finally, the annealing. The results have shown that an improvement in the impact strength can be obtained after the second quenching at 40 °C. The impact tests experimentally performed on the molding prototypes yield useful data for a particular structural and impact-loading case. But, it is generally not practical, in terms of time and cost, to experimentally characterize the effects of a wide range of design variables. A successful numerical model for the Izod impact strength of polymers can provide convenient and useful guidelines on product design and, therefore, decrease the disadvantages arising from purely experimental trial and error. It is expensive to prepare the samples for the tests. Therefore, it is necessary to develop a mathematical model that will predict the fracture toughness of polycarbonate as a function of the quenching temperature. Mathematical models for the mechanical properties like the tensile strength, Young%s modulus and Izod impact strength as functions of the quenching temperature are not available. There is no sign that they can be built up from a simple theory; a polynomial interpolation was, therefore, used to generate a fracture-toughness model using the data obtained from the experiments. The shifted model represents the Izod impact of the samples as a function of the first- and second-quenching temperatures"},{"@xml:lang":"sl","#text":"Ta študija preučuje razvoj matematičnega modela vpliva prostega kaljenja na Izod udarno trdnost polikarbonata (PC). Uporabljeni so bili trije različni načini toplotne obdelave: najprej prosto kaljenje iz staljenega stanja na različne temperature, nato drugo kaljenje iz Tg + 15 °C in nato končno žarjenje. Rezultati so pokazali, da je mogoče doseči izboljšanje Izod udarne trdnosti po drugem kaljenju pri 40 °C. Eksperimentalno izvedeni preizkusi na modeliranih prototipih so dali uporabne podatke za posebne primere strukturno in udarno obremenjenih primerov. Vendar pa na splošno ni praktično % s stališča časa in stroškov % eksperimentalno določanje vplivov različnih oblik. Uspešen numerični model za Izod udarno trdnost polimerov lahko zagotovi zanesljive in uporabne napotke za načrtovanje proizvodov in s tem zmanjša pomanjkljivosti, ki izvirajo iz eksperimentalnih preizkusov in napak. Priprava vzorcev za preizkuse je draga. Zato je treba razviti matematični model, ki bo napovedoval lomno žilavost polikarbonata v odvisnosti od temperature kaljenja. Na razpolago ni modelov za mehanske lastnosti, kot so natezna trdnost, Youngov modul in Izod udarna trdnost, v odvisnosti od temperature kaljenja. Ni znamenj, da se lahko postavijo z enostavno teorijo: zato je bila z uporabo eksperimentalnih podatkov uporabljena interpolacija polinomov za izdelavo modela lomne žilavosti. Predstavljeni model predstavlja Izod udarno trdnost v odvisnosti od prve in druge temperature kaljenja"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:DOC-MHL4PK8Y","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:DOC-MHL4PK8Y"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:DOC-MHL4PK8Y/c43d5be9-34fa-4612-8c8f-967655417699/PDF"},"edm:rights":{"@rdf:resource":"http://rightsstatements.org/vocab/InC/1.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:DOC-MHL4PK8Y/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:DOC-MHL4PK8Y"}}}}