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李光俊,杨恒,许旭东,李恒,杨合.薄壁纯钛管数控弯曲成形性能研究[J].稀有金属材料与工程(英文),2018,47(1):26~32.[LI Guangjun,yangheng,Xu xudong,LI Heng and YANG He.Formability of thin-walled commercial pure titanium tube upon rotary draw bending[J].Rare Metal Materials and Engineering,2018,47(1):26~32.]
Formability of thin-walled commercial pure titanium tube upon rotary draw bending
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Received:February 02, 2016  Revised:June 29, 2016
DOI:
Key words: bending  commercial pure titanium tube  formability  material properties  defects
Foundation item:(50905144) 国家自然科学基金项目(面上项目,重点项目,重大项目) (51522509) 优秀青年科学基金
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LI Guangjun,yangheng,Xu xudong,LI Heng and YANG He  
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Abstract:
      Under variations of bending radii and material properties, the multi-defect constrained formability of thin-walled commercial pure titanium (CP-Ti) tube is identified to explore the forming potential of this advanced lightweight material via explicit/implicit 3D-FE models and the experiments. The major results show that: 1) The variations of hardening exponents, thickness anisotropy exponent and Young’s modulus, have great effects on bending formability; 2) Compared with the wall thinning and cross-section deformation, the wrinkling instability is the dominant defect to restrain the bending formability of the large diameter thin-walled (LDTW) CP-Ti tube. The bending formability of CP-Ti tube, especially the anti-wrinkling capability, can be improved at elevated temperatures.