Theory 7
Agilent Nano Indenter G200 User’s Guide
7-21
Figure 7-14
Additional example of data for determining indenter area
function
When determining area function dynamically the contact stiffness is
determined continuously during loading.
Contact Stiffness is defined as:
(27)
Contact Depth is defined as:
(28)
Contact Area is defined as:
(29)
S
F
o
h
o
------
cos
K
s
–
=
h
c
h
0.75
P
S
--------------
–
=
A
4
---
S
E
r
-----
2
=
