Institute of Solid State Physics


SS22WS22SS23WS23SS24WS24      Guidelines for Master Students

Advanced evaluation of the instrumented Charpy V-notch test
B. Krenmayr
Institute of Materials Science and Welding, Graz University of Technology, Graz, Austria
15:00 - 17:00 Monday 28 September 2015 Foyer Alte Technik

One important material property in mechanical engineering is the fracture toughness, which describes the resistivity of the material against crack propagation. However, this material property is very expensive to evaluate. Therefore, a simplified technological test setup was introduced decades ago, to estimate the fracture behavior using the impact energy. The most frequently used, very simple measurement system is the Charpy V-notch test. The basic setup only returns the so-called impact energy. By using several strain gauges and an inductive eddy current sensor, more detailed information during the test can be recorded. The main result is the force-displacement diagram, which can be evaluated and used for further interpretation of the material behavior.
Previous investigations have shown that manually obtained results were strongly dependent on the operator. In order to handle the large amount of data and for a better comparability, an evaluation program by means of MATLABĀ® is developed. This smart software tool, which is presented in this contribution, permits a very fast and more repeatable interpretation of the measured data.