Experimental and Finite Element Analysis of Single Stage Single Point Incremental Forming

Document Type : Original Article


Department of Mechanical Engineering, Dr.M.G.R Educational and Research Institute, Maduravoyal, Chennai, Tamilnadu, India


Incremental forming is one of the non-traditional forming processes which is widely used in rapid prototyping and customized component manufacturing. One of the challenges encountered in single stage single point incremental forming (SSSPIF) is difficulty in achieving greater wall angle for a considerable depth. In this research work, the investigation is carried out by experimental and numerical simulation for reaching the maximum wall angle to a possible depth without any defects in SSSPIF. SSSPIF of truncated cone shaped component from 1mm thick AISI304 austenitic stainless steel are made at a different wall angles. Also, numerical simulation using LS-DYNA explicit solver is performed and the results are validated with the experimental values. Components with the wall angle of 64o is successfully without any defects made in a single stage forming for a depth of 45 mm within the experimented process parameters. Major strain, minor strain and thickness distribution in the sheet material due to forming process are obtained from experiments and finite element analysis (FEA). From the results of both experiment and FEA, it is observed that the major strain, minor strain and thinning effects are higher in the region below the major diameter of the truncated cone at all experimented wall angles. Also the FEA results have shown good agreement with the experimental values. Further it is seen that the strains are increasing with the increase of wall angle.


  1. Jackson, K., Allwood, J., “The mechanics of incremental sheet forming”, Journal of Materials Processing Technology. Vol. 209, No. 3, (2009), 1158-1174. https://doi.org/10.1016/j.jmatprotec.2008.03.025
  2. Gupta, P., Jeswiet, J., “Effect of temperatures during forming in single point incremental forming”, International Journal of Advanced Manufacturing Technology. 95, No. 9-12, (2018), 3693-3706. https://doi.org/10.1007/s00170-017-1400-0
  3. Esmailian, M., Khalili, K., “Prediction of Tool Force in Two Point Incremental Forming by Slab Analysis”, International Journal of Engineering, Transactions B: Applications. 33, No. 11, (2020), 2399-2407. https://doi.org/10.5829/ije.2020.33.11b.30
  4. Adams D, Jeswiet J., “Design rules and applications of single-point incremental forming”, Proceedings of the Institution of Mechanical Engineers Part B: Journal of Engineering Manufacture. 229, No. 5, (2015), 754-760. https://doi.org/10.1177/0954405414531426
  5. Ndip-Agbor E, Cheng P, Moser N, Ehmann K, Cao J., “Prediction of rigid body motion in multi-pass single point incremental forming”, Journal of Materials Processing Technology. 269, (2019), 117-127. https://doi.org/10.1016/j.jmatprotec.2019.02.007
  6. Shigekazu T., “Incremental sheet metal formed square-cup obtained through multi stepped process”, Procedia Manufacturing. 15, (2018), 1170-1176. https://doi.org/10.1016/j.promfg.2018.07.372
  7. Safari, M., “Two-point incremental forming of a complicated shape with negative and positive dies”, Iranian Journal of Materials Forming. Vol. 4, No. 2, (2017), 51-61.
  8. Safari, and J. Joudaki, “Fabrication of a complicated specimen with two-point incremental forming process”, International Journal of Advanced Design and Manufacturing Technology. Vol.12, No.4, (2019), 83-88.
  9. Duflou JR, Habraken AM, Cao J, Malhotra R, Bambach M, Adams D, Vanhove H, Mohammadi A, Jeswiet J., “Single point incremental forming: state-of-the-art and prospects”. International Journal of Material Forming. 11, No. 6, (2018), 743-773. https://doi.org/10.1007/s12289-017-1387-y
  10. Vahdani M, Mirnia MJ, Bakhshi-Jooybari M, Gorji H., “Electric hot incremental sheet forming of Ti-6Al-4V titanium, AA6061aluminum, and DC01 steel sheets”, The International Journal of Advanced Manufacturing Technology, 103, No.1-4, (2019), 1199-1209. https://doi.org/10.1007/s00170-019-03624-2
  11. Choi H, Lee C., “A mathematical model to predict thickness distribution and formability of incremental forming combined with stretch forming”, Robotics and Computer Integrated Manufacturing, 55, (2019), 164-172. https://doi.org/10.1016/j.rcim.2018.07.014
  12. Safari M, Mostaan H., “Experimental and numerical investigation of laser forming of cylindrical surfaces with arbitrary radius of curvature”, Alexandria Engineering Journal, 55, No. 3, (2016), 1941-1949. https://doi.org/10.1016/j.aej.2016.07.033
  13. Safari M, Alves de Sousa R, Joudaki J., “Fabrication of saddle-shaped surfaces by a laser forming process: An experimental and statistical investigation”, Metals, 10, No. 7, (2020), 883-895. https://doi.org/10.3390/met10070883
  14. Nguyen DT, Kim YS., “A numerical study on establishing the forming limit curve and indicating the formability of complex shape in incremental sheet forming process”, International Journal of Precision Engineering and Manufacturing, 14, No. 12, (2013), 2087-2093. https://doi.org/10.1007/s12541-013-0283-8
  15. Memicoglu P, Music O, Karadogan C., “Simulation of incremental sheet forming using partial sheet models”, Procedia Engineering, 207, (2017), 831-835.https://doi.org/10.1016/j.proeng.2017.10.837
  16. Kim, H., Park, T., Esmaeilpour, R., andPourboghrat, F, “Numerical study of incremental sheet forming processes”, IOP Conference Series: Journal of Physics. 1063, (2018), 012017. https://doi.org/10.1088/1742-6596/1063/1/012017
  17. Blaga A., Oleksik V., “A study on the influence of the forming strategy on the main strains, thickness reduction, and forces in a single point incremental forming process”, Advances in Material Science and Engineering, (2013), 1-10. http://dx.doi.org/10.1155/2013/382635
  18. Golabi, S.I. Khazaali, H., “Determining frustum depth of 304 stainless steel plates with various diameters and thicknesses by incremental forming”, Journal of Mechanical Science and Technology, 2 8, No. 8, (2014), 3273-3287.https://doi.org/10.1007/s12206-014-0738-6
  19. Li, J., Li, S., Xie, Z., Wang, W., “Numerical simulation of incremental sheet forming based on GTN damage model”, International Journal of Advanced Manufacturing Technology, 81, No.9-12, (2015), 2053-2065.https://doi.org/10.1007/s00170-015-7333-6
  20. Wang, J., Nair, M., Zhang, Y., “An efficient force prediction strategy in single point incremental sheet forming”, Procedia Manufacturing. 5, (2016), 761-771.https://doi.org/10.1016/j.promfg.2016.08.062
  21. Neto, D. M., Martins, J. M. P., Oliveira, M. C., Menezes, L. F., Alves, J. L., “Evaluation of stress and strain states in the single point incremental forming process”, International Journal of Advanced Manufacturing Technology, 85, No. 1-4, (2016), 521-534.https://doi.org/10.1007/s00170-015-7954-9
  22. Panahi Leavoli, R., Gorji, H., Bakhshi-Jooybari, M., Mirnia, M. J., “Investigation on Formability of Tailor-Welded Blanks in Incremental Forming”, International Journal of Engineering, Transactions B: Applications. 33, No. 5 (2020), 906-915.https://doi.org/10.5829/ije.2020.33.05b.23
  23. Sajjad, M., Joy, J. A., Jung, D. W., “Finite element analysis of incremental sheet forming for metal sheet”, Key Engineering Materials, 783, (2018), 148-153. https://doi.org/10.4028/www.scientific.net/KEM.783.148.
  24. Maqbool, F., Bambach, M., “Dominant deformation mechanisms in single point incremental forming (SPIF) and their effect on geometrical accuracy”, International Journal of Mechanical Sciences, 136, (2018), 279-292. https://doi.org/10.1016/j.ijmecsci.2017.12.053
  25. Shrivastava, P., Tandon, P., “Microstructure and texture based analysis of forming behavior and deformation mechanism of aa1050 sheet during single point incremental forming”, Journal of Materials Processing Technology, 266, (2019), 292-310. https://doi.org/10.1016/j.jmatprotec.2018.11.012
  26. Centeno, G., Bagudanch, I., Martínez-Donaire, A. J., Garcia-Romeu, M. L., Vallellano, C., “Critical analysis of necking and fracture limit strains and forming forces in single-point incremental forming”, Materials and Design, 63, (2014), 20-29. https://dx.doi.org/10.1016/j.matdes.2014.05.066
  27. Nasulea, D., Oancea, G., “Integrating a new software tool used for tool path generation in the numerical simulation of incremental forming processes”, Strojniškivestnik-Journal of Mechanical Engineering, 64, No. 10 (2018), 643-651. https://doi.org/10.5545/sv-jme.2018.5475
  28. Wang, J., Li, L., Zhou, P., Wang, X., Sun, S., “Improving formability of sheet metals in incremental forming by equal diameter spiral tool path”, The International Journal of Advanced Manufacturing Technology, 101, No. 1-4, (2019), 225-234. https://doi.org/10.1007/s00170-018-2911-z
  29. Moser, N., Pritchet, D., Ren, H., Ehmann, K. F., Cao, J., “An efficient and general finite element model for double-sided incremental forming”, Journal of Manufacturing Science and Engineering, 138, No. 9, (2016), 091007 (1-10). https://doi.org/10.1115/1.4033483
  30. Wu, M., Zha, G., Zirui, G., “FEA of vertical parts formed with multistage incremental sheet metal forming based on the forming limit stress diagram”, International Journal of Advanced Manufacturing Technology, 93, No. 5-8, (2017), 2155-2160. https://doi.org/10.1007/s00170-017-0630-5