Abstract
The stress concentration problem of round and flat bars with V-shaped notches is important especially for the test specimen used to investigate the fatigue strength of materials. Accurate stress concentration factors have been given in a recent analysis of the body force method. However, the results of the solutions have been presented in tabular form which is not suitable for engineering applications. In this paper, convenient formulas which give the stress concentration factors of better than 1% accuracy are proposed using the Neuber formula and the solution of the V-shaped notch in the semi-infinite plate.
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