1. Date of download: 3/9/2018
Copyright © ASME. All rights reserved.
From: Ultrasonic Measurements of Contact Stiffness Between Rough Surfaces
J. Tribol. 2014;136(3): doi: /
Figure Legend:
Schematic experimental setup for the simultaneous measurement of separation a and reflection of ultrasonic waves (RT,RL) as a function of load P

2. Date of download: 3/9/2018
Copyright © ASME. All rights reserved.
From: Ultrasonic Measurements of Contact Stiffness Between Rough Surfaces
J. Tribol. 2014;136(3): doi: /
Figure Legend:
Tangential RT and longitudinal RL reflection coefficient versus loading and unloading (fine sandblasted, Sa=0.832μm)

3. Date of download: 3/9/2018
Copyright © ASME. All rights reserved.
From: Ultrasonic Measurements of Contact Stiffness Between Rough Surfaces
J. Tribol. 2014;136(3): doi: /
Figure Legend:
Tangential RT and longitudinal RL reflection coefficient versus loading and unloading (coarse sandblasted, Sa=5.13μm)

4. Date of download: 3/9/2018
Copyright © ASME. All rights reserved.
From: Ultrasonic Measurements of Contact Stiffness Between Rough Surfaces
J. Tribol. 2014;136(3): doi: /
Figure Legend:
Tangential RT and longitudinal RL reflection coefficient versus loading and unloading (EDM, Sa=8.94μm)

5. Date of download: 3/9/2018
Copyright © ASME. All rights reserved.
From: Ultrasonic Measurements of Contact Stiffness Between Rough Surfaces
J. Tribol. 2014;136(3): doi: /
Figure Legend:
Tangential KT and normal KN contact stiffness and stiffness ratio KT/KN (the right-hand scale in the figure) versus loading and unloading (fine sand- blasted, Sa=0.832μm)

6. Date of download: 3/9/2018
Copyright © ASME. All rights reserved.
From: Ultrasonic Measurements of Contact Stiffness Between Rough Surfaces
J. Tribol. 2014;136(3): doi: /
Figure Legend:
Tangential KT and normal KN contact stiffness and stiffness ratio KT/KN versus loading and unloading (coarse sandblasted, Sa=5.13μm)

7. Date of download: 3/9/2018
Copyright © ASME. All rights reserved.
From: Ultrasonic Measurements of Contact Stiffness Between Rough Surfaces
J. Tribol. 2014;136(3): doi: /
Figure Legend:
Tangential KT and normal KN contact stiffness and stiffness ratio KT/KN versus loading and unloading (EDM, Sa=8.94μm)

8. Date of download: 3/9/2018
Copyright © ASME. All rights reserved.
From: Ultrasonic Measurements of Contact Stiffness Between Rough Surfaces
J. Tribol. 2014;136(3): doi: /
Figure Legend:
Contact stiffness ratio KT/KN and linear trends versus loading for all surfaces

9. Date of download: 3/9/2018
Copyright © ASME. All rights reserved.
From: Ultrasonic Measurements of Contact Stiffness Between Rough Surfaces
J. Tribol. 2014;136(3): doi: /
Figure Legend:
The slopes of the KT/KN trends from Fig. 8 as a function of the roughness amplitude Sa