6Stachowicz F.Bending with upsetting of copper tube elbows.Journal of Materials processing Technology,2000.100,236~240. 被引量:1
7Tang NC.Plastic-deformation analysis in tube bending.International Journal of Pressure Vessels and Piping,2000.77:751~759. 被引量:1
8Junichi Endow,Tadao Murota.On the flattening of cross-section of circular tubes in uniform bending[J].Advanced Technology of Plasticity,1984,1:67-78. 被引量:1