Stress Concentration Factors for ASTM E8/E8M-16a Standard Round Specimens for Tension Testing

摘要

Occasionally, round specimens for tension testing that comply with ASTM standards fail in oneof the transition regions between gage and grip sections. This occurs because of the stressconcentration present in transition regions. When this happens, it is possible to seek stressrelief by increasing fillet radii in these regions. The objective of this note is to quantify therelief afforded by increasing radii. The approach adopted to this end is finite element analysisthat is carefully verified. Stress concentration factors are thus accurately determined to threefigures for all of the various types of standard round specimens in ASTM E8/E8M-16a, StandardTest Methods for Tension Testing of Metallic Materials.