Puck Tool

PUCK tool: Parameter estimation and postprocessing tool for composite failure mechanism


Jörg Hohe
Fraunhofer Institute for Mechanics of Materials IWM

Simon Appel
ATG Europe B.V. for the European Space Agency (TEC-MSS)


In engineering practice, the barrier for the application of a superior, mode based, failure model like for example the Puck Criterion is still quite large compared to simpler phenomenological models like the Tsai-Wu criterion. The reasons being that the latter is often applicable as a user sub-routine in finite element codes and since the related experimental data naturally shows a large scatter, a robust routine for the parameter estimation is needed to exploit the advantages of a more sophisticated failure mode based model.
The puck tool is developed under the ESA GSTP program and is free to use numerical tool for all organizations within ESA member states. The tool helps to overcome the aforementioned barriers and facilitates the application of Puck’s Failure criterion for structural integrity analysis. The tool offers two modules: the first helping with the parameter estimation and determination of the related confidence intervals, the second module performing a structural integrity analysis by post processing FE stress data obtained from MSC Nastran analyses.
The latter giving both,the critical failure location and the leading failure mode which are important information for a design optimization.

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