Notched Ball Test (web-App)

Evaluation of strength, pre-factor and effective regions
(press ENTER to evaluate)

(c) Institut für Struktur- und Funktionskeramik - Montanuniversität Leoben, 31.05.2011

Terms of Use:
This tool is provided by ISFK to promote the use of the NB-test. The practical use of the test is simple, but its evaluation requires FEM-calculations which we make available here. The use of the tool is free of charge. If you use data generated with the applet (strength, pre-factor or effective regions) for your work, please cite:
this page ( and
P.Supancic, R.Danzer, S.Witschnig, E.Polazcek, R.Morrell: "A New Test to Determine the Tensile Strength of Brittle Balls - The Notched Ball Test", Journal of the European Ceramic Society 29 (2009), 2447 - 2459.