FEM modeling and experimental of NC bending process of thin-wall tube with large diameter and small bending radius

With the increasingly insistent demand for the thin-wall tube with large diameter and small bending radius in the field of aerospace industry,a whole 3D explicit FEM model of the bending process including bending,retracting and unloading(springback) has been established based on the experiment and analytical research with the dynamic explicit FEM code ABAQUS/Explicit.In the modeling,the bending process for 50mm×1mm(out diameter×wall thickness) series of stainless and aluminum tubes are considered.Then combined with the experimental comparison,the difficulty faced with in FE modeling and the corresponding resolving method are discussed.