Browsing by Author "Horák, Lukáš"
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- ItemPorovnání mechanických vlastností vysokopevnostních materiálů TWIP 800 a DOCOL 1200(Technická Univerzita v Liberci, 2008) Horák, Lukáš; Doubek, PavelThis bachelor work deals with the determination of basic mechanical properties for newly developed material marked like TWIP (Twinning Induced Plasticity). Measured properties like running of tensile stresses, ultimate strength, ductility and normal and plane coefficient of anisotropy were calculated from results of static tensile test. Tests were carried out in labs of TUL, like samples were used sheet blanks-all according the valid standards. In bachelor work are described all measurements, calculations and results - including theory. The benefit of this work is the necessary first step to measure and describe basic behavior of TWIP material.
- ItemZjištění křivek přetvárné pevnosti pomocí optického systému ARAMIS.(Technická Univerzita v Liberci, 2011) Horák, Lukáš; Sobotka, JiříThis thesis is focused on determination of the true stress ? and true strain ? for steels in the area over ultimate strength by means of the optical contact-less system ARAMIS. In theoretical part of thesis is described mainly topic about sheets using in automotive industry and basics of photogrammetry. In experimental part is given methodology for determination of true stress ? and true strain ? in the area over ultimate strength of tested materials. The main benefit of this thesis is future possibility to validate influence of input data (real and regressed values of true stress ? and true strain ? into numerical simulations of forming process.