Springback analysis of thick-walled tubes under combined bending-torsion loading with consideration of nonlinear kinematic hardening

• Published in: Production engineering (Berlin, Germany) Germany), 2020-04, Vol.14 (2), p.135-145
• Main Authors: Farhadi, A., Nayebi, A.
• Format: Article
• Language: English
• Subjects: Bend radius; Communication; Computer simulation; Engineering; Finite element method; Hardening; Industrial and Production Engineering; Kinematics; Loading rate; Mathematical models; Production; Springback; Thick walls; Tubes
• ISSN: 0944-6524; 1863-7353
• DOI: 10.1007/s11740-020-00951-2

Numerical solution to the problem of the springback of thick wall tubes is investigated with consideration of nonlinear kinematic hardening model. Also, the effects of different types of loading and their sequences on the springback of these pipes have been investigated. In the employed approach in this research, the precision of the springback forecast has increased, which will reduce the cost and time for assembly of materials. Considering the effects of loading, it is possible to take steps to reduce springback. In addition, the problem is simulated by finite element method, in addition to modeling this problem, its results can be used to validate the numerical solution of the problem. It is shown when the bending loading rate increases, the bending springback angle decreases and with increasing torsional loading rate compared to the bending loading, the torsional springback angle decreases. Also, by changing the loading sequence, for example, bending and then fixing the bending radius and increasing the torsional angle (torsional loading) can significantly reduce bending springback angles.