Joining Sheets to Tubular Profiles by Tube Forming Rosa, P. A. R., Rodrigues, J. M. C., & Martins, P. A. F. (2003). External inversion of thin-walled tubes using a die: experimental and theoretical investigation. International Journal of Machine Tools & Manufacture, 43, 787­796. doi:10.1016/ S0890-6955(03)00062-2 Rosa, P. A. R., Rodrigues, J. M. C., & Martins, P. A. F. (2004). Internal inversion of thin-walled tubes using a die: experimental and theoretical investigation. International Journal of Machine Tools & Manufacture, 44, 775­784. doi:10.1016/j. ijmachtools.2004.01.013 Sekhon, G. S., Gupta, N. K., & Gupta, P. K. (2003). An analysis of external inversion of round tubes. Journal of Materials Processing Technology, 133, 243­256. doi:10.1016/S0924-0136(02)00438-7 Standard, A. S. T. M. E8/E8M-09. (2008). Standard test methods for tension testing of metallic materi- als. West Conshohocken, PA: ASTM International. Sun, Z., & Yang, H. (2002). Development of a finite element simulation system for the tube axial compressive precision forming process. Interna- tional Journal of Machine Tools & Manufacture, 42, 15­20. doi:10.1016/S0890-6955(01)00100-6 Tomesani, L. (1997). Analysis of a tension-driven outside-in tube inversion. Journal of Materials Processing Technology, 64, 379­386. doi:10.1016/ S0924-0136(96)02589-7 Yang, H., & Li, S. (1995). Process optimization of the inverting-forming of thin-walled tubes with radiused dies. Journal of Materials Processing Technology, 52, 489­495. doi:10.1016/0924-0136(94)01621-7 Yang, H., Zhichao, S., & Yingjun, J. (2001). FEM analysis of mechanism of free deformation under dieless constraint in axial compressive forming process of tube. Journal of Materials Processing Technology, 115, 367­372. doi:10.1016/S0924- 0136(01)01018-4