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<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/"><rdf:Description rdf:about="https://dk.um.si/IzpisGradiva.php?id=26929"><dc:title>Model for fatigue lifetime prediction of torsion bars subjected to plastic presetting</dc:title><dc:creator>Močilnik,	Vinko	(Avtor)
	</dc:creator><dc:creator>Gubeljak,	Nenad	(Avtor)
	</dc:creator><dc:creator>Predan,	Jožef	(Avtor)
	</dc:creator><dc:subject>presetting</dc:subject><dc:subject>torsion</dc:subject><dc:subject>spring-bars</dc:subject><dc:subject>fatigue</dc:subject><dc:subject>lifetime</dc:subject><dc:subject>cyclic fatigue</dc:subject><dc:subject>torque</dc:subject><dc:subject>spring steel</dc:subject><dc:description>The torsion presetting of a spring-bar is a common technique for extending the elastic twist-angle and increasing torque, but it reduces fatigue lifetime.Spring-bars are used as shock absorbers in caterpillar machines. Spring-bars, made from high strength fine-grain steel, grade VCN, provide a high level of absorbed energy. Any slight change in the presetting procedure has a strong influence on fatigue-lifetime. Within the same loading range, springs can exhibit low-cyclic or high-cyclic fatigue behavior regarding different presetting levels. A model for fatigue-lifetime and shear-stress levels is proposed on the basis of performed tests. Considering prescribed fatigue tests, it is possible to optimize a spring bar's geometry, in order to survive the required number of cycles.</dc:description><dc:date>2011</dc:date><dc:date>2012-06-01 08:40:06</dc:date><dc:type>Znanstveno delo</dc:type><dc:identifier>26929</dc:identifier><dc:language>sl</dc:language></rdf:Description></rdf:RDF>