Paper Titles
Preface
Hot Double-Sided Incremental Forming of Fiber-Reinforced Thermoplastics: Process Capabilities and Challenges
p.1
Classifying Parameters and Target Variables in Incremental Sheet Forming of Fiber Reinforced Polymers
p.11
Comparative Analysis of Die Materials for Reducing the Rebound-Effect in Electromagnetic Forming Processes
p.27
Comparison of PEEK and UHMWPE Cranial Implants Fabricated at Room Temperature Using Single Point Incremental Forming (SPIF)
p.37
Combined Finite Element Simulation and Regression Modeling for Predicting Final Protrusion Length of Twisted Hairpin Legs in Stators
p.51
Design and Development of a Hydrostatic Support Device for Hot Incremental Sheet Forming of PMMA
p.59
Numerical Study of Process-Specific Disturbances in Hollow Embossing Rolling
p.65
On the Surface Quality of Incrementally Formed Niobium Sheets
p.75

Hot Double-Sided Incremental Forming of Fiber-Reinforced Thermoplastics: Process Capabilities and Challenges

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Abstract:

Fiber-reinforced thermoplastics (FRTP) offer high strength-to-weight ratios as well as weldability and recyclability, making them attractive for lightweight applications. Conventional thermoforming of continuous FRTP, however, requires part-specific molds, limiting economic viability for prototypes, individual parts, and small series. This study investigates a robotic hot double-sided incremental forming (DSIF) process developed for dieless, flexible forming of continuous FRTP sheets together with metal dummy sheets. Five different generic demonstrator parts with varying wall angles, degrees of symmetry, forming depths, and sizes were formed to assess process capability. Results demonstrate that typical defects such as fabric wrinkling and deconsolidation can be successfully avoided, and that the geometric accuracy achievable is comparable to that of metal DSIF. Challenges exist in forming larger parts due to the failure of the employed metal dummy sheets.

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Periodical:

Solid State Phenomena (Volume 389)

Pages:

1-9

DOI:

https://doi.org/10.4028/p-u5oc0K

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Cite this paper

Online since:

April 2026

Authors:

Jan Erik Rath*, Doran Nettig, Thorsten Schüppstuhl

Keywords:

Automotive Composites, Fiber Reinforced Plastic, Free Forming, Incremental Sheet Forming, Robot

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Creative Commons CC BY 4.0

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* - Corresponding Author

References

[1] Estin & Co, Lucintel, JEC Observer, JEC composites magazine. Special issue. (2025).

Google Scholar

[2] A. Ogale, C. Weimer, T. Grieser, P. Mitschang, Textile Halbzeuge, in: M. Neitzel, P. Mitschang, U. Breuer (Eds.), Handbuch Verbundwerkstoffe, Carl Hanser Verlag GmbH & Co. KG, München, 2014, p.73–93.

DOI: 10.3139/9783446436978.003

Google Scholar

[3] C. Cherif, The Textile Process Chain and Classification of Textile Semi-finished Products, in: C. Cherif (Ed.), Textile Materials for Lightweight Constructions: Technologies - Methods - Materials - Properties, 1st ed., Springer, Berlin Heidelberg, 2016, p.9–35.

DOI: 10.1007/978-3-662-46341-3_2

Google Scholar

[4] L. Medina, J. Mack, M. Christmann, Imprägnierte Halbzeuge, in: M. Neitzel, P. Mitschang, U. Breuer (Eds.), Handbuch Verbundwerkstoffe, Carl Hanser Verlag GmbH & Co. KG, München, 2014, p.135–199.

DOI: 10.3139/9783446436978.005

Google Scholar

[5] A. Al-Obaidi, A. Kunke, V. Kräusel, Hot single-point incremental forming of glass-fiber-reinforced polymer (PA6GF47) supported by hot air, J. Manuf. Process. 43 (2019) 17–25.

DOI: 10.1016/j.jmapro.2019.04.036

Google Scholar

[6] J. Jeswiet, Asymmetric Incremental Sheet Forming, AMR 6-8 (2005) 35–58.

DOI: 10.4028/www.scientific.net/AMR.6-8.35

Google Scholar

[7] R. Malhotra, J. Cao, F. Ren, V. Kiridena, Z. Cedric Xia, N.V. Reddy, Improvement of Geometric Accuracy in Incremental Forming by Using a Squeezing Toolpath Strategy With Two Forming Tools, J. Manuf. Sci. Eng. 133 (2011).

DOI: 10.1115/1.4005179

Google Scholar

[8] S. Ullah, P. Xu, X. Li, Y. Li, K. Han, D. Li, A Review on Part Geometric Precision Improvement Strategies in Double-Sided Incremental Forming, Metals 12 (2022) 103.

DOI: 10.3390/met12010103

Google Scholar

[9] T.A. Marques, M.B. Silva, P.A.F. Martins, On the potential of single point incremental forming of sheet polymer parts, Int. J. Adv. Manuf. Technol. 60 (2012) 75–86.

DOI: 10.1007/s00170-011-3585-y

Google Scholar

[10] H. Zhu, H. Ou, A. Popov, Incremental sheet forming of thermoplastics: a review, Int. J. Adv. Manuf. Technol. 111 (2020) 565–587.

DOI: 10.1007/s00170-020-06056-5

Google Scholar

[11] C. Hou, X. Su, X. Peng, X. Wu, D. Yang, Thermal-Assisted Single Point Incremental Forming of Jute Fabric Reinforced Poly(lactic acid) Biocomposites, Fibers Polym. 21 (2020) 2373–2379.

DOI: 10.1007/s12221-020-1016-0

Google Scholar

[12] T.-C. Lim, S. Ramakrishna, Modelling of composite sheet forming: a review, Compos. - A: Appl. Sci. Manuf. 33 (2002) 515–537.

DOI: 10.1016/S1359-835X(01)00138-5

Google Scholar

[13] K. Jackson, J. Allwood, The mechanics of incremental sheet forming, J. Mater. Process. Technol. 209 (2009) 1158–1174.

DOI: 10.1016/j.jmatprotec.2008.03.025

Google Scholar

[14] J.-E. Rath, T. Schüppstuhl, Tool path strategies for single point incremental forming of fiber-reinforced thermoplastic sheets, in: Material Forming: ESAFORM 2024, Materials Research Forum LLC, 2024, p.641–650.

DOI: 10.21741/9781644903131-71

Google Scholar

[15] R. Emami, M.J. Mirnia, M. Elyasi, A. Zolfaghari, An experimental investigation into single point incremental forming of glass fiber-reinforced polyamide sheet with different fiber orientations and volume fractions at elevated temperatures, J. Thermoplast. Compos. Mater. 36 (2022) 1893-1917.

DOI: 10.1177/08927057221074266

Google Scholar

[16] S.M. Mirnia Kalaei, M. Razbin, M. Emami, M.R. Gholami, M. Salehian, F.R. Biglari, Analysis of single-point warm incremental forming for glass fiber-reinforced polyamide 6 sheets: Experimentation and simulation, J. Thermoplast. Compos. Mater.

DOI: 10.1177/08927057241255884

Google Scholar

[17] G. Ambrogio, F. Borda, R. Conte, L. Filice, F. Gagliardi, Processing of sheets made of long fibers reinforced plastics by SPIF, in: Material Forming: ESAFORM 2024, Materials Research Forum LLC, 2024, p.1536–1543.

DOI: 10.21741/9781644903131-170

Google Scholar

[18] D. Nettig, J.-E. Rath, T. Schüppstuhl, J. Frank, B. Riecken, C.-A. Keun, Hot double sided incremental forming of continuous fiber reinforced thermoplastics: Process analysis and system design, in: Material Forming: ESAFORM 2025, Materials Research Forum LLC, 2025, p.1267–1276.

DOI: 10.21741/9781644903599-138

Google Scholar

[19] S. Ullah, X. Li, P. Xu, Y. Li, K. Han, D. Li, A toolpath strategy for improving geometric accuracy in double-sided incremental sheet forming, CJA 36 (2023) 468–479.

DOI: 10.1016/j.cja.2021.12.002

Google Scholar

[20] P. Konka, R. Lingam, U.A. Singh, C. Shivaprasad, N.V. Reddy, Enhancement of accuracy in double sided incremental forming by compensating tool path for machine tool errors, Int. J. Adv. Manuf. Technol. 111 (2020) 1187–1199.

DOI: 10.1007/s00170-020-06149-1

Google Scholar

[21] M. Vanhulst, Y. Lee, D. Steinfels, T. Bremen, K. Perzyński, H. Vanhove, G. Ambrogio, R.-E. Breaz, G. Buffa, R. Conte, L. de Napoli, L. Fratini, X.T. Da Fu, F. Gagliardi, M. Gralha, P. Kang, Ł. Kuczek, A.S. Kumar, A. Kunke, A. Leonhardt, Y. Li, Z. Li, R. Licari, H. Long, D.W.W. Low, S.-G. Racz, P. Scholz, M.B. Silva, S. Song, D. Weise, K. Żaba, H. Zhu, D. Bailly, M. Banu, L. Madej, J.R. Duflou, ESAFORM benchmark 2024: study on the geometric accuracy of a complex shape with single point incremental forming, Int. J. Mater. Form. 18 (2025).

DOI: 10.1007/s12289-025-01928-1

Google Scholar