dr.ir. W.J.B. Grouve (Wouter)

Assistant Professor


Composite Materials
Fracture Toughness
Composite Materials
Fracture Toughness


My research activities revolve around the manufacturing and performance of composite parts and structures, with a specialization in thermoplastic composites. I am particularly interested in the influence of the manufacturing process on the performance of the final part. Progress in this field requires a structured two-step approach that is outlined in the figure below. First, we need to understand how the processing history affects the material’s microstructure, in which microstructure is defined broadly and encompasses properties such as void fraction, crystalline morphology and fiber-matrix distribution. Secondly, we need to understand how this microstructure affects the (mechanical) performance on a macro-scale.

The performance of a composite component is determined by its microstructure, which then again strongly depends on the raw materials used and the chosen manufacturing route.

A proper description of the interrelations between process, microstructure and performance requires a sound understanding of the underlying physical mechanisms. I rely on experiments, often combined with simple models, to identify and analyze these mechanisms. Our laboratory is well equipped for this task with access to all relevant processing equipment for (thermoplastic) composites. Moreover, our group has a strong background in the development of special-purpose test setups to analyze material behavior for which no standard procedure exists. Once well understood, the relevant mechanisms are implemented in predictive models for use by the industry in order to optimize either the materials used, the processing route or the design of the final component.

I have worked on several manufacturing processes for thermoplastic composites, including laser-assisted fiber placement, over-injection molding, co-consolidation of metal-composite joints, stamp forming, autoclave consolidation, and welding. Currently, I am working on press forming of fiber-placed blanks, vacuum-bag-only consolidation and co-molding of metal inserts. Moreover, I am also involved in two projects focusing on predictive (long-term) performance of thermoplastic composites.

Are you interested to learn more about my research activities or looking to collaborate? Please feel free to contact me.


Slange, T. K., Warnet, L. L., Grouve, W. J. B., & Akkerman, R. (2018). Consolidation quality and mechanical performance of stamp formed tailored blanks produced by rapid AFP. In Proceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018 [020031] (AIP conference proceedings; Vol. 1960). DOI: 10.1063/1.5034832
Slange, T. K., Warnet, L., Grouve, W. J. B., & Akkerman, R. (2017). Challenges in Stamp Forming Tailored Blanks. Paper presented at SAMPE Europe Conference 2017, Stuttgart, Germany.
Kok, T., Grouve, W. J. B., Warnet, L. L., & Akkerman, R. (2017). Quantification of tape deconsolidation during laser assisted fiber placement. Paper presented at 3rd International Symposium on Automated Composites Manufacturing, ACM 2017, Montreal, Canada.
Slange, T. K., Warnet, L. L., Grouve, W. J. B., & Akkerman, R. (2017). Influence of Prepreg Characteristics on Stamp Consolidation. In Proceedings of the 20th International ESAFORM Conference on Material Forming: ESAFORM 2017 [030034] (AIP Conference Proceedings; Vol. 1896). AIP. DOI: 10.1063/1.5008021
Sacchetti, F., Grouve, W. J. B., Warnet, L. L., & Villegas, I. F. (2017). Effects of release media on the fusion bonding of carbon/PEEK laminates. Composites. Part A : Applied science and manufacturing, 94, 70-76. DOI: 10.1016/j.compositesa.2016.11.028

UT Research Information System


I am involved in the following educational activities:

  • Composites (191121710) The course provides an introduction into the mechanical behavior of and manufacturing processes for continuous fiber reinforced composite structures. The main theoretical part deals with the Classical Lamination Theory. It starts from constituent properties, via the mechanical behavior of a single ply, to the thermo-mechanical behavior of a laminate. Moreover, the failure of such materials is also highlighted.

    The course also gives the opportunity to apply the acquired knowledge to some applications. This includes a set of labworks both modeling oriented (Finite Element Analysis) and experimentally oriented (composites manufacturing and mechanical testing).
  • Supervisor for Academic Research Skills, and BSc & MSc Assignments The assignments are related to ongoing research projects on the manufacturing and performance of composites and typically involve both theoretical and experimental work. Topics can range from heat transfer modelling for induction welding to the design of an experimental setup to characterize the performance of high performance composites. Feel free to drop by and ask about the possibilities in case you are interested in a challenging research assignment in the field of composite materials.


Affiliated Study Programmes




Contact Details

Visiting Address

University of Twente
Faculty of Engineering Technology
Horst Complex (building no. 20), room N208
De Horst 2
7522LW  Enschede
The Netherlands

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Mailing Address

University of Twente
Faculty of Engineering Technology
Horst Complex  N208
P.O. Box 217
7500 AE Enschede
The Netherlands