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

Abstract

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.

Springback Analysis of Flexible Stretch Bending of Multi-Point Roller Dies Process for Y-Profile under Different Process Parameters

“…Based on a springback test, Daxin et al mastered the law of springback angle-changing with material parameters under certain pipe sizes and bending conditions [11,12]. Farhadi et al considered the nonlinear kinematic hardening model when studying springback, and they analyzed the numerical solution of a springback problem on thick-walled pipe [13]. Ozturk et al studied the springback behavior of hardened 5083-H111 aluminum magnesium alloy with a thickness of 3 mm at different temperatures [14].…”

An Enhanced Hybrid Springback Compensation Approach: Springback Path – Displacement Adjustment Method For Complex Shaped Products of Sheet Metal Forming

“…Springback is a process in which the internal stress in a part is released after removing the constraint of the die or trimming addendum surface [4][5]. It may lead to undesirable geometries and rejected products [6][7]. Currently the issue of springback may be resolved in the stage of pre-production or postproduction.…”