{"?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-EEUUT3JR/c6b5906b-753f-4127-a1f0-6ab9a66c4fcf/PDF","dcterms:extent":"859 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-EEUUT3JR/3db733d8-4635-48e2-a44e-fc86019b620e/TEXT","dcterms:extent":"31 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-EEUUT3JR","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":["Bilici, Mustafa Kemal","Kastan, Alim","Yükler, Ahmet Ýrfan"],"dc:format":[{"@xml:lang":"sl","#text":"letnik:48"},{"@xml:lang":"sl","#text":"številka:5"},{"@xml:lang":"sl","#text":"str. 705-711"}],"dc:identifier":["COBISSID:1095850","ISSN:1580-2949","URN:URN:NBN:SI:doc-EEUUT3JR"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"dc:subject":[{"@xml:lang":"en","#text":"friction-stir spot welding"},{"@xml:lang":"sl","#text":"parametri varjenja"},{"@xml:lang":"sl","#text":"polimeri"},{"@xml:lang":"sl","#text":"polipropilen"},{"@xml:lang":"en","#text":"polymer welding"},{"@xml:lang":"en","#text":"polymers"},{"@xml:lang":"en","#text":"polypropylene"},{"@xml:lang":"sl","#text":"termoplasti"},{"@xml:lang":"en","#text":"thermoplastics"},{"@xml:lang":"sl","#text":"torno-vrtilno točkasto varjenje"},{"@xml:lang":"sl","#text":"varjenje polimera"},{"@xml:lang":"en","#text":"welding parameters"},{"@rdf:resource":"http://www.wikidata.org/entity/Q81163"}],"dcterms:temporal":{"@rdf:resource":"2000-2024"},"dc:title":{"@xml:lang":"sl","#text":"Effect of the tool geometry and welding parameters on the macrostructure, fracture mode and weld strength of friction-stir spot-welded polypropylene sheets| Vpliv geometrije orodja in parametrov varjenja na makrostrukturo, vrsto preloma in trdnost zvara pri torno-vrtilnem točkastem varjenju polipropilenskih plošč|"},"dc:description":[{"@xml:lang":"sl","#text":"The effect of the tool geometry and welding parameters on the macrostructure, fracture mode and weld strength of the friction-stir spot welds of polypropylene sheets was studied. Three fracture modes were observed: the nugget pull-out failure, the cross-nugget failure and the mixed nugget failure under a lap-shear tensile test and nugget debonding and a pull out under a cross-tension loading, while the lap-shear tensile load was not affected significantly by the delay time. The lap-shear tensile load and the nugget thickness increased with the increasing tool rotation speed and dwell time. The macrostructure shows that the welding parameters have a determinant effect on the weld strength (x: the nugget thickness, y: the thickness of the upper sheet). Finally, when different welding parameters were used, different fracture modes of the joints were obtained in the friction-stir spot welding of polypropylene sheets. Based on the experimental observation of the macrostructures, the effect of the welding parameters and tool geometry on the lap-shear tensile load and the fracture mode were discussed"},{"@xml:lang":"sl","#text":"Preučevan je bil vpliv geometrije orodja in parametrov varjenja na makrostrukturo, vrsto preloma in trdnost zvara pri torno-vrtilnem točkastem zvaru polipropilenskih plošč. Opaženi so trije načini preloma: porušitev z izpuljenjem jedra, porušitev s pretrgom jedra in mešan prelom jedra pri prekrivnem strižnem preizkusu ter prekinitve v jedru in izpuljenje jedra pri prečni natezni obremenitvi, medtem ko na prekrivno natezno obremenitev ni bilo velikega vpliva. Prekrivna strižna napetost in debelina jedra sta naraščali z naraščanjem rotacijske hitrosti orodja in časa zadržanja. Makrostruktura kaže, da parametri varjenja igrajo pomembno vlogo pri trdnosti zvara (x: debelina jedra, y: debelina zgornje plošče). Končno, če so bili uporabljeni različni parametri varjenja, so bili različni tudi načini porušitve pri torno-vrtilnem točkastem varjenju polipropilenskih plošč. Na osnovi eksperimentalnih opažanj makrostrukture je prikazan vpliv parametrov varjenja in geometrije orodja na prekrivno strižno natezno obremenitev in vrsto preloma"}],"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-EEUUT3JR","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:DOC-EEUUT3JR"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:DOC-EEUUT3JR/c6b5906b-753f-4127-a1f0-6ab9a66c4fcf/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-EEUUT3JR/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:DOC-EEUUT3JR"}}}}