Material testing and component testing

Following applications can be distinguished:

Material testing: At a defined loading (tension, compression, torsion, bending), the force and object deformation is measured. From these values, stress strain curves and material parameters like E-modulus, Poisson's ratio or more complex values are determined. Depending on the complexity of the test, different measurement techniques are used:

RTSS-Videoextensometer. Examples:

Determination of E-Modulus E-Modul-Bestimmung
Long-term test of a rubber specimen RTSS  Videoextensometer
 Digital Image Correlation. Examples:
Tensile test with large strain Hencky
Shear test shear000021
Crack propagation crack000042
Component testing is conducted to prove, that a certain loading condition does not lead to failure of the specimen. Besides fatigue tests, very often complex loadings are applied. The measured strain distribution allows the determination of local "hot spots" Due to its high flexibility, Digital image correlation is the best solution for this measurement task.
Examples:
Strain distribution on a clutch spring Blattfeder
Strain distribution during the welding process Schweissnaht
Test / Validation of FEM-models:
Digital Image correlation can be used for any object's geometry and material. The measurement results are compared with FEM simulations and the underlying material parameters or FEM models improved.
Example:
Airbag development Airbag-Cover

 

Further applications are listed in the section Applications/Digital Image Correlation.