Notch Sensitivity Study in U-notched Polymers Built by Additive Manufacturing (AM)
DOI:
https://doi.org/10.3221/IGF-ESIS.66.07Keywords:
Notch Sensitivity, uniaxial fatigue, additive manufacturing, printed polymersAbstract
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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Copyright (c) 2023 Jorge Guillermo Diaz Rodriguez, Alberto David Pertuz Comas, Juan David Sandoval Herrera
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