4. Existing data

4.1 Kt data

At the end of this article, we provide an extensive bibliography on stress concentration problems. We believe it is useful to comment on this bibliography so that the reader can quickly and efficiently select the documents he or she needs for the calculation.

The first substantial published work on these problems was by Heinz Neuber in the 1950s . It is a theoretical-analytical study which is still a very important source of data today. The stress concentration coefficient is determined...