IJSTR >> Volume 9 - Issue 4, April 2020 Edition

[Full Text]

AUTHOR(S)

V Shanmukha Prasad, B K Krishna Sai Ram, K B Murali Krishna, T Lokesh Kumar Reddy, S Vijay Kumar

KEYWORDS

Finite element analysis, stress concentration factor, shouldered shaft with taper, tension.

ABSTRACT

For the past five decades, Peterson’s elastic stress concentration factor (SCF) charts had been used as design tool for shoulder filleted shafts loaded in tension, bending and torsion. The demand for accurate data pertaining to the elastic stress concentration is rapidly increasing in the economical product design and development cycles. On the other hand, the use of finite element analysis (FEA) is becoming more popular, but the designers are still using the design charts of SCF because the notch stresses need to be calculated accurately without consuming time for meshing and refinement required to model the regions where stress concentration is expected to be high. The designers are often dependant on SCF for the standard geometries [1] to support this. The primary objective is to analyze the influence of taper on the SCF of a filleted shaft in tension. The comprehensive FE analyses were carried out over an ample range of shoulder filleted shaft geometries with varying taper in tension to evaluate elastic SCF and von-Mises SCFs. These finite element results are presented in the common graphical form and verified with the values published for several geometries in the literature. Also, the results reported in this paper demonstrate that there has been a significant reduction in the SCFs of shoulder filleted shaft with taper.

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