Numerical and experimental analysis of resin-flow, heat-transfer, and cure in a resin-injection pultrusion process

Michael Sandberg*, Onur Yuksel, Ismet Baran, Jesper H. Hattel, Jon Spangenberg

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)


This paper concerns non-isothermal flow in a thermoset resin-injection pultrusion process. Supported by temperature measurements from an industrial pultrusion line and a material characterisation study (curing kinetics, chemorheology, and permeability), the material flow was analysed for the manufacture of a thick glass-fibre profile saturated with a pultrusion-specific polyurethane resin. A central finding is that the heating configuration, together with the strongly convective flow near inlets resulted in phase transitions that were both concave and convex-shaped. This is different from existing literature that commonly describes curing being initiated from die-walls, resulting in the concave phase-transitions.

Original languageEnglish
Article number106231
JournalComposites Part A: Applied Science and Manufacturing
Issue number15
Publication statusPublished - 2021
Externally publishedYes


  • Arbitrary Lagrangian–Eulerian (ALE)
  • Liquid composite moulding
  • Non-isothermal flow
  • Polyurethane resin
  • Resin-injection pultrusion

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