@ARTICLE{Sadłowska_H._Strain_2020, author={Sadłowska, H. and Morawiński, Ł. and Jasiński, C.}, volume={vol. 65}, number={No 1}, journal={Archives of Metallurgy and Materials}, pages={257-263}, howpublished={online}, year={2020}, publisher={Institute of Metallurgy and Materials Science of Polish Academy of Sciences}, publisher={Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences}, abstract={The paper presents a method of measuring deformations of cylindrical samples on the testing machine for free tube hydroforming experiments. During experiments a sample made of a thin-walled metal tube is expanded by the internal pressure of the working liquid and additionally subjected to axial compression. This results in a considerable circumferential deformation of the tube and its shortening. Analysis of the load cases and their impact on the deformations can be helpful in determining e.g. tube material properties or general limiting conditions in the tube hydroforming process. In connection with the above, the value of deformations and knowledge of their course during experiment has become one of the most important problems related to the issue described above.}, type={Article}, title={Strain Measurements in Free Tube Hydroforming Process}, URL={http://www.czasopisma.pan.pl/Content/115056/PDF/AMM-2020-1-32-Sadlowska.pdf}, doi={10.24425/amm.2020.131725}, keywords={strain measurement, hydroforming, stereovision}, }