Browsing by Author "Kandra, Tomáš"
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- ItemComparison Of Deformation Characteristics Of The Steel Sheet In Local And Global Area By The Static Loading Using Videoextensometry(Chemické Listy, 2011) Hlebová, Stanislava; Pešek, Ladislav; Kandra, TomášTwo steel sheets used for deep drawing of the compressor cover were investigated using the videoextensometry technique for strain monitoring during tensile test. The material causing cracks during deep drawing has higher both yield stress and strength and lower ductility comparing with material without problems in technology. The strain hardening exponent n is increasing in the strain interval up to just before R-m, while the values measured in local area were lower than values measured in global area. The plastic strain ratio is decreasing for both materials measured in local and global area.