Notch Sensitivity Study in U-notched Polymers Built by Additive Manufacturing (AM)

Authors

  • Jorge Guillermo Diaz Rodriguez Universidad Industrial de Santander. Escuela de ingeniería mecánica, Carrera 27, calle 9. Bucaramanga, Colombia
  • Alberto David Pertuz Comas Universidad Industrial de Santander. Escuela de ingeniería mecánica, Carrera 27, calle 9. Bucaramanga, Colombia
  • Juan David Sandoval Herrera Universidad Industrial de Santander. Escuela de ingeniería mecánica, Carrera 27, calle 9. Bucaramanga, Colombia

DOI:

https://doi.org/10.3221/IGF-ESIS.66.07

Keywords:

Notch Sensitivity, uniaxial fatigue, additive manufacturing, printed polymers

Abstract

Onyx ® is a new material composed of Polyamide 6 reinforced with short carbon fiber, used in the novel additive manufacturing composites technique. This paper aims to present the axial fatigue performance of this material with and without U-notches. The experimentally determined S-N fatigue curve was obtained under axial load with a load inversion ratio, R = 0.1, and compared to fatigue performance of U-notched samples ranging from 0.25 to 2 mm radius. In addition, the stress concentration factor was compared for static and alternative loading to obtain the notch sensitivity in terms of the U-notch radius, showing that there is indeed a difference in stress concentration between them. The advantage of the approach is that it permits using commonly used dimensioning methods for this AM material.

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    Published

    27-09-2023

    Issue

    Vol. 17 No. 66 (2023): October 2023

    Section

    SI: Fracture Fatigue and Wear

    Categories

    License

    Copyright (c) 2023 Jorge Guillermo Diaz Rodriguez, Alberto David Pertuz Comas, Juan David Sandoval Herrera

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