naa a22 4500 51082319X CHVBK 20180411083543.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s12541-013-0059-1 doi (NATIONALLICENCE)springer-10.1007/s12541-013-0059-1 Springback nonlinearity of high-strength titanium alloy tube upon mandrel bending [Elektronische Daten] [Heng Li, He Yang, Fei-Fei Song, Guang-Jun Li] Taking the stress-relieved Ti-3Al-2.5V tube as the objective, regarding both angular and radius springback, the nonlinear springback behaviors of the high-strength titanium tube (HSTT) upon the universal bending, viz., mandrel bending (rotary draw bending), areclarified. The experiments are conducted to identify the springback and validate the theoretical models, and the deformation theory of plasticity and the explicit/implicit 3D-FE based models are used to reveal the rules and the physical mechanism of the nonlinearity of elastic recovery. The results show that: 1) At early bending stages, the angular springback increases nonlinearly with larger bending angles, then it increases linearly when the bending angle exceeds a critical one; While the radius growth decreases exponentially with the increasing of the bending angles at early stages, then it remains unchanged when the bending angle exceeds another critical value; The springback behaves more nonlinearly under smaller bending radii; Both the critical values for the two springback phenomena become larger with smaller bending radii; The critical angle for radius springback is larger than the one for angular springback. 2) The relationship between the radius springback and angular one is further identified; The radius springback can be estimated by the angular springback of the bending regions of tube; The variation of bending radii has significant effect on angular and radius springback, while it has little influence on the springback angle by the straight regions; The variation of the material properties affects both the springback phenomena much more significantly than the changing of the processing parameters. Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg, 2013 Springback nationallicence Tube bending nationallicence Nonlinearity nationallicence Titanium alloy nationallicence High strength nationallicence Δφ : total springback angle nationallicence Δφb : springback angle of the bending portion of tube nationallicence Δφs : springback angle of two straight portions of tube nationallicence Δρ : radius springback (radius growth) nationallicence Li Heng State Key Laboratory of Solidification Processing, School of Materials Science, Northwestern Polytechnical University, 710072, Xi'an, China aut Yang He State Key Laboratory of Solidification Processing, School of Materials Science, Northwestern Polytechnical University, 710072, Xi'an, China aut Song Fei-Fei State Key Laboratory of Solidification Processing, School of Materials Science, Northwestern Polytechnical University, 710072, Xi'an, China aut Li Guang-Jun Chengdu Aircraft Industry (Group) Corporation Ltd., 610092, Chengdu, China aut International Journal of Precision Engineering and Manufacturing Korean Society for Precision Engineering 14/3(2013-03-01), 429-438 2234-7593 14:3<429 2013 14 12541 https://doi.org/10.1007/s12541-013-0059-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12541-013-0059-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Heng State Key Laboratory of Solidification Processing, School of Materials Science, Northwestern Polytechnical University, 710072, Xi'an, China aut NATIONALLICENCE 700 1- Yang He State Key Laboratory of Solidification Processing, School of Materials Science, Northwestern Polytechnical University, 710072, Xi'an, China aut NATIONALLICENCE 700 1- Song Fei-Fei State Key Laboratory of Solidification Processing, School of Materials Science, Northwestern Polytechnical University, 710072, Xi'an, China aut NATIONALLICENCE 700 1- Li Guang-Jun Chengdu Aircraft Industry (Group) Corporation Ltd., 610092, Chengdu, China aut NATIONALLICENCE 773 0- International Journal of Precision Engineering and Manufacturing Korean Society for Precision Engineering 14/3(2013-03-01), 429-438 2234-7593 14:3<429 2013 14 12541 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer