TY - JOUR
T1 - Research on Bursting Behavior in Hydroforming of Double-Cone Tube
AU - Yuan, Wen Jing
AU - Tian, Hao Bin
AU - Liu, Xiao Hang
AU - Wang, Xiao Song
AU - Yuan, Shi Jian
JF - Advanced Materials Research
VL - 154-155
SP - 678
EP - 685
SN - 1662-8985
PY - 2011
PB - Trans Tech Publications
DO - 10.4028/www.scientific.net/AMR.154-155.678
UR - https://www.scientific.net/AMR.154-155.678
KW - Bursting
KW - Hydroforming
KW - Internal High Pressure Forming
KW - Tube
KW - Wrinkle
AB - Firstly, the geometry condition of useful wrinkles during the hydroforming of double-cone tube was given. Then the stress condition of useful wrinkles was given by formula between the parameters of wrinkles shape at the end of axial feeding and internal pressure, hoop stress and axial stress. The analytical results were compared with the FEM analysis and experiments results. The results show that the useful wrinkles must meet both the geometry condition and the stress condition. The geometry condition of useful wrinkles is that the area of arbitrary length of wrinkles is a little smaller than the area of corresponding die cavity. The stress condition of useful wrinkles is that shape parameter G is not smaller than the radius R at the top of middle wrinkle. That means the increment of thickness strain dεt is positive and no thickness thinning will occur during the calibration. When the wrinkles didn’t match geometry condition, the dead wrinkles or bursting will take place. And when the wrinkles didn’t match stress condition, the bursting at top of middle wrinkle will occur during the calibration.
ER -