Novel specimen geometries for fatigue testing of additive manufactured metals under axial, torsion, and combined axial-torsion loadings
Using the geometric freedom offered by additive manufacturing, a plate-type specimen
geometry for axial fatigue testing, a hollow cylindrical specimen for torsion testing, and two
thin-walled circular cross section specimens for torsion or axial-torsion fatigue testing are
proposed. The proposed geometries reduce the stress concentration at the gage-to-grip
transition area, improve the uniformity of the shear stress distribution throughout the wall
thickness, and increase buckling resistance during the compression part of the loading …
geometry for axial fatigue testing, a hollow cylindrical specimen for torsion testing, and two
thin-walled circular cross section specimens for torsion or axial-torsion fatigue testing are
proposed. The proposed geometries reduce the stress concentration at the gage-to-grip
transition area, improve the uniformity of the shear stress distribution throughout the wall
thickness, and increase buckling resistance during the compression part of the loading …
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