Impression test—A review

Plasticity enhancement in Ni–P amorphous alloy/Ni/Zr-based metallic glass composites with a sandwich structure

“…It is known that the relation between the contact modulus, E c , and elastic modulus, E, of a material can be expressed as [22,23] …”

Obtaining full contact for measuring polydimethylsiloxane mechanical properties with flat punch nanoindentation

“…Calculating the elastic modulus of the samples depends on the contact area between the tip and the sample, which should not change during the flat punch indentation. However, the full contact between the flat punch tip and the sample is not initially established due to the unavoidable sample tilt with respect to the cylindrical flat punch surface, which results in incorrect elastic modulus values when using automated indentation [1] , [2] . This situation is shown schematically in Fig.…”

“…1 (a), and applies for the larger diameter flat punch cylindrical tips. While indentation experiments using flat punch indentation of PDMS have been conducted before [2] , [3] , there is no study explicitly addressing the problem of full contact.…”

Analysis of Indentation-Derived Power-Law Creep Response

“…With a series of uniaxial tests, the constants A and n can be determined by plotting the measured strain rates against the applied stresses, both in logarithmic scales. A representative early development of indentation-based creep measurement is the impression creep method (Ref [4][5][6], which involves pressing a flat-end cylinder onto the test material under a constant load and observing the increase in depth. The creep stress exponent and/or activation energy obtained by this technique have been found to be consistent with those measured by conventional uniaxial creep tests (Ref 5 -7).…”