{"?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-LO7X2XYC/ddf0bf2e-cbb1-4dcb-b5ea-f83a7e0c2c76/HTML","dcterms:extent":"29 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-LO7X2XYC/f61a7916-cb04-4ec2-8c53-ca84de072e22/PDF","dcterms:extent":"723 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-LO7X2XYC/3dc9715c-7163-40da-8963-baba4f8774cb/TEXT","dcterms:extent":"22 KB"}],"edm:TimeSpan":{"@rdf:about":"1999-2025","edm:begin":{"@xml:lang":"en","#text":"1999"},"edm:end":{"@xml:lang":"en","#text":"2025"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:DOC-LO7X2XYC","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:spr-6QOUKQ9A"},{"@xml:lang":"sl","#text":"Strojniški vestnik"}],"dcterms:issued":"2009","dc:creator":["Adamović, Dragan","Aleksandrović, Srbislav","Lazić, Vukić","Stefanović, Milentije"],"dc:format":[{"@xml:lang":"sl","#text":"letnik:55"},{"@xml:lang":"sl","#text":"številka:6"},{"@xml:lang":"sl","#text":"8 strani"},{"@xml:lang":"sl","#text":"str. 392-405"}],"dc:identifier":["ISSN:0039-2480","COBISSID:11066651","URN:URN:NBN:SI:doc-LO7X2XYC"],"dc:language":"en","dc:publisher":[{"@xml:lang":"sl","#text":"Association of Mechanical Engineers and Technicians of Slovenia et al."},{"@xml:lang":"sl","#text":"Zveza strojnih inženirjev in tehnikov Slovenije et al."}],"dc:subject":[{"@xml:lang":"sl","#text":"anizotropija"},{"@xml:lang":"sl","#text":"kovine"},{"@xml:lang":"sl","#text":"plastična deformacija"},{"@xml:lang":"sl","#text":"preoblikovanje"},{"@xml:lang":"sl","#text":"valjanje"},{"@rdf:resource":"http://www.wikidata.org/entity/Q466686"}],"dcterms:temporal":{"@rdf:resource":"1999-2025"},"dc:title":{"@xml:lang":"sl","#text":"Variation of normal anisotropy ratio \"r\" during plastic forming|"},"dc:description":[{"@xml:lang":"sl","#text":"Cold rolled thin sheet metals are typical anisotropic materials as a consequence of the production process of rolling. Anisotropy is usually described from two aspects: as plane anisotropy and as a normal one. Most frequently used anisotropy parameter is the normal anisotropy ratio or the r value, which represents strains ratio in sheet metal plane and along its thickness. It is determined experimentally, usually as mean constant numeric valu, without testing the possible variation in dependence on realized plastic strain. Accurate defining of the r value has great significanc, since it is not only the formability parameter, but also the crucial anisotropy parameter in software for simulation of the plastic forming process. The paper presents the results of experimental investigation of three typical materials: low carbon Al killed steel DC04 sheet metal, alloy AlMg4.5Mn0.7 sheet metal and stainless steel X5CrNi18-10 sheet metal. Particular attention is given to defining the dependence of the r value on plastic strain during the forming process. The experiment requires sophisticated devices and accurate calculations. In the actual case, the computerized measuring system Zwick/Roell Z 100 was used. In addition, the paper contains the proposal on how to take into account variations of the r values during the plastic forming process"},{"@xml:lang":"sl","#text":"Hladno valjana tanka pločevina je tipičen primer anizotropnega materiala, ki je posledica proizvodnega procesa valjanja. Anizotropija se običajno obravnava v dveh smereh: kot ravninska in normalna anizotropija. Kot parameter anizotropije se najpogosteje uporablja koeficient normalne anizotropije oz. vrednost r, ki predstavlja količnik raztezkov v ravnini in po višini pločevine. Določa se eksperimentalno, običajno kot srednja konstantna numerična vrednost in brez preverjanja morebitne odvisnosti od dejanske plastične deformacije. Točna določitev vrednosti r je zelo pomembna, saj ne predstavlja le parametra oblikovalnosti temveč je tudi ključni parameter anizotropije za programsko simulacijo procesov plastičnega preoblikovanja. V članku so predstavljeni rezultati eksperimentalne raziskave treh tipičnih materialov: pločevine DC04 iz maloogljičnega pomirjenega jekla, pločevine iz zlitine AlMg4.5Mn0.7 in nerjavne jeklene pločevine X5CrNi18-10. Posebna pozornost je bila posvečena določitvi odvisnosti vrednosti r od plastičnih deformacij med procesom preoblikovanja. Za izvedbo eksperimenta je potrebna napredna oprema in točni izračuni. V našem primeru je bil uporabljen računalniški merilni sistem Zwick/Roell Z 100. V članku je podan tudi predlog za upoštevanje spreminjanja vrednosti r med procesom plastičnega preoblikovanja"}],"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-LO7X2XYC","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:DOC-LO7X2XYC"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:DOC-LO7X2XYC/f61a7916-cb04-4ec2-8c53-ca84de072e22/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":"Univerza v Ljubljani, Fakulteta za strojništvo"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:DOC-LO7X2XYC/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:DOC-LO7X2XYC"}}}}