Notch Sensitivity Study in U-notched Polymers Built by Additive Manufacturing (AM)
Keywords:Notch Sensitivity, uniaxial fatigue, additive manufacturing, printed polymers
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.
Copyright (c) 2023 Jorge Guillermo Diaz Rodriguez, Alberto David Pertuz Comas, Juan David Sandoval Herrera
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