Podcasts

Validation of numerical simulations � a step forward

Prof Eann Patterson from the University of Liverpool talks about validation of computational solid mechanics models using strain fields measured with camera-based systems. How much evidence do we need to accept a model as being an appropriate representation of reality? And how can we extract a meaningful quality measure from a comparison of millions of measurement and simulation data points?

 

Validation of numerical simulations � test cases from solid mechanics

Prof. George Lampeas from the University of Patras presents a generic validation procedure and applies it to a diversity of problems from solid mechanics: thermo-mechanical verification of a space antenna reflector; indentation of soft non-linear material; bending of a structural beam. These test cases were part of the Validation Interlaboratory Study.

 

Calibration of camera-based instruments

Dr Erwin Hack from Empa, Switzerland, introduces a procedure and reference materials appropriate for calibration of camera-based instruments to measure strain and deformation. Calibration is a pre-requisite for the traceability of measurement results, and for using them in a validation process for numerical simulations. More information on calibration is found here.

An image decomposition approach to validation

Dr Erwin Hack from Empa addresses validation of the design of engineering structures by comparing FE results to camera-based measurement data. After decomposition of the full-field data sets data compatibility is quantified by the distance of the parameters. This generic methodology allows for quantifying model quality.