For UOE tube with low springback stress,the Bauschinger Effect makes the yierld strength of flated specimen be lower than that of UOE tube body which received expanding process.

• 对UOE管,由于其弹复应力低,包申格效应使压平试样的屈服强度低于经强力扩径强化的管体屈服强度,因而这种表征是偏于安全的。