Reference Materials
VANESSA Reference Material for Calibration
For calibration of optical systems measuring static or dynamic deformations a reference material based on a cantilever beam was designed. You can download the description of the reference material here.

For the non-linear case where the deflection is not directly proportional to the applied load anymore the specifications of the cantilever beam must be adapted. You can download the specifications of the reference material for non-linear loading here.