Basic principles, advantages and limits of the most used Experimental methods and of the Dimensional Analysis, helpful instruments in numerical modelling

Kdy? 17.5.2010 13:15
Kategorie

On these lecture will be presented the basics of those experimental methods, which are used in to validate the results of the numerical modelling.

In this sense, starting from the Electric Strain Gage Method will be presented:

  • the Moiré Grid Method;
  • the Thin Photo-elastic Layer’s Method (the So-called PhotoStress Method);
  • the Holographic Interferometry;
  • the Video Image Correlation Method (used in relatively large displacements field evaluation):
  • the Fuji-PressCoat contact-films’ advantages in contact pressure evaluation for some realistic contact model’s elaboration ( for conceiving of some realistic models).

In this sense, their advantages and limits will be analysed. Also the accuracy of the offered information (strain, stress or displacements) will be presented.

Will be analysed the basics of the Dimensional Analysis, which represents a modern and powerful instrument in reduced scale modelling technique.

Several engineering problems have to solve even experimental analysis of large (or relative large) structures, even to perform experiments for systems having a large number of parameters/variables. In these cases, the Dimensional Analysis offers the optimal solution by using reduced scale models, or only by using its reduced number of variables. In both cases the experiments will have a reduces/low costs and also a reduced requested time.

After these basics of the above-mentioned methods, will be illustrated the advantages and limits of these methods by means of some research results of the author:

- displacement field evaluation of the fractured human bones using electric strain gage method, Holographic Interferometry and Video Image Correlation;

- displacement field evaluation of  large reticular structures (with Holographic Interferometry and inductive transducers) based on reduced scale modelling with Dimensional Analysis;

- advantages of the Dimensional Analysis in the large structures' experimental investigations  using reduced scale modelling;

 

Finally, the author proposes a direct discussion (round-table / workshop) with the participants about the analysed experimental methods, their advantages and limits focused on the auditorium’s researches;

 

One other useful part of this meeting will consist of a discussion concerning on the auditorium’s further numerical modelling problems, based on some high-accuracy experimental validation, where (in the author’s opinion) the Transilvania University’s research team can be helpfully.

Evropská unie, ESF, MŠMT, OP Vzdělávání pro konkurenceschopnost, ZČU

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