Round bar notch shape optimization for tensile stress concentration testing

Abstract

Notched structures in machine parts for several reasons cause discontinuity and stress concentration. It is essential to optimize these stress concentrations in notched parts. This study determined the best notch shape by creating different notch shapes by keeping two key points fixed on the spline curve in the notched region. This paper involves optimizing the shape of a fillet in a notched tension bar. An optimal shape was aimed to minimize the notch factor without causing yield anywhere in the bar by parametrically controlling the spline of the fillet via ANSYS parametric design language code. Optimal shapes of B-spline curves were obtained for round bars subject to axial tension loadings. Changing the code can also be used for bending or combined loading conditions other than tensile loading.