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Novel Repair Concept for Composite Materials by Repetitive Geometrical Interlock Elements.

Werner Hufenbach1, Frank Adam2, Thomas Heber3

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A new composite interlock repair concept simplifies thermosetting polymer repairs. This automatable method ensures uniform material distribution and reproducible results for fiber-reinforced polymer applications.

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Area of Science:

  • Materials Science
  • Polymer Engineering
  • Composite Materials

Background:

  • Current repair methods for thermosetting matrix composites are labor-intensive and complex.
  • Achieving uniform material and geometric properties in repaired zones is challenging.

Purpose of the Study:

  • To introduce a novel composite interlock repair concept for fiber-reinforced polymers.
  • To systematically develop and analyze the interlock repair technology's material and geometric influences.

Main Methods:

  • Development of a composite interlock repair concept utilizing undercuts prepared via water-jet technology.
  • Numerical and experimental sensitivity analyses to evaluate material and geometrical factors.

Main Results:

  • The novel interlock repair concept demonstrates reproducible repair capabilities.
  • The method allows for uniform distribution of material and geometric parameters in the repair zone.
  • Sensitivity analyses provide insights into optimizing the repair technology.

Conclusions:

  • The proposed composite interlock repair concept offers a reproducible and automatable solution for thermosetting matrix composites.
  • Water-jet technology is effective for preparing the necessary undercuts for the interlock mechanism.
  • This advancement reduces the significant efforts typically required for composite repair.