Do you know a valid method to define the deformability/compliance of a surface?

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Michael Leighton

You probably want to consider nanoindentation, but it would be good to know the material you are interested in characterising.

For engineering materials, you can find out more about modelling the contact deformation in "Contact Mechanics" by K. Johnson, and more about measurement techniques in "Nanotribology and Nanomechanics - An Introduction" by B. Bhushan.

Cloé Dussault-Picard

Thank you Michael Leighton !

Pierre Puchaud

Hey, if it's a hard material I would use the Vickers metric.

Otherwise, the stiffness of the material, or the compliance = (1/stiffness) would be fine.