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Phd defense by Christian Krogh

Phd defense by Christian Krogh

Characterization and Modeling of Woven Carbon Fiber Prepreg Plies for Automated Draping Processes


10.01.2020 kl. 10.00 - 13.00



In order to make the application of advanced composite materials more viable in the industry, issues with high manufacturing costs have to be addressed. The approach taken in the FlexDraper research project is to automate the draping process, i.e. layup on the mold, of entire plies of prepreg fabric by means of a flexible and reconfigurable robot with a grid of movable grippers. The scope of the project is double curved molds of low curvature which are frequently found in the aerospace industry. The present PhD project studies the automatic draping process from a mechanical point of view. This involves the development of a simulation model based on experimental material characterization that can predict e.g. wrinkles and other defects in the layup. Yet, the key matter is the determination robot trajectories that will lead to draped plies of acceptable quality. This matter is addressed by means of a computationally efficient ply model and an optimization scheme.

Assessment Committee       

  • Associate Jørgen Asbøll Kepler (chairman), Department of Materials and Production, Aalborg University, Denmark
  • Professor Jesper Henri Hattel, DTU, Denmark
  • Stress Engineer Bellucci Giordano, Alfa Romeo, Zürich, Schweiz


  • Associate Professor Johnny Jakobsen, Aalborg University, Denmark


The PhD defense will be hosted by Moderator Associate professor, Jørgen Kepler. The lecture constitutes a 45 minutes presentation by Christian Krogh followed by a short break and a discussion session with questions from the opponents and the auditorium.

After the defense, at approx. 13.00 hours, the Department of Materials and Production will welcome all to a reception in Fibigerstræde 14, Common Room.




Department of Materials and Production


Fibigerstræde 16, room 1.108, 9000 Aalborg, Denmark

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