Strain-rate dependence of viscous properties of the plantar soft tissue identified by a spherical indentation test

2020 ◽  
Vol 102 ◽  
pp. 103470
Author(s):  
Takuo Negishi ◽  
Kohta Ito ◽  
Arinori Kamono ◽  
Taeyong Lee ◽  
Naomichi Ogihara
Keyword(s):  
Soft Tissue ◽  
Strain Rate ◽  
Indentation Test ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Spherical Indentation ◽  
Plantar Soft Tissue

Effect of High Strain Rate on Indentation in Pure Aluminum

2013 ◽  
Vol 135 (2) ◽  
Author(s):  
Hiroyuki Yamada ◽  
Nagahisa Ogasawara ◽  
Yoko Shimizu ◽  
Keitaro Horikawa ◽  
Hidetoshi Kobayashi ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Loading Rate ◽  
High Strain ◽  
Pure Aluminum ◽  
Indentation Test ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Loading Rates ◽  
Micro Indentation

The indentation properties of pure aluminum (99.9%, 3N aluminum) and high purity aluminum (99.999%, 5N aluminum) with respect to the strain rate dependence of strength are experimentally investigated in order to clarify the effect of strain rate on the micro-indentation test. A micro-indentation test using a Berkovich indenter was performed at loading rates of 0.7, 7, and 70 mN/s. In all of the specimens, the indenter was loaded to a maximum value of 1200 mN, and then was maintained for 30 s. In the 3N specimen, the dependence of the loading rate on the load was slight at loading rates of 0.7 and 7 mN/s, whereas the load at the loading rate of 70 mN/s was higher than the loads at loading rates of 0.7 and 7 mN/s. On the other hand, the load for the 5N specimen increased with the increasing loading rate. Thus, the effect of the loading rate on the load-displacement curve for the 3N and 5N specimens was similar to the strain rate dependence of strength for theses metals. In addition, the micro-indentation test was demonstrated to be strongly affected by high strain rate at a loading rate of 70 mN/s.

Effect of Displacement Rate on Sharp Millimeter Indentation

2016 ◽  
Vol 715 ◽  
pp. 111-115 ◽  
Author(s):  
Hiroyuki Yamada ◽  
Midori Hotta ◽  
Nagahisa Ogasawara
Keyword(s):  
Strain Rate ◽  
Testing Machine ◽  
Indentation Test ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Displacement Rate ◽  
Plastic Properties ◽  
Microscopic Scale ◽  
Static Indentation ◽  
The Impact

Indentation is widely used to investigate the elastic and plastic properties of materials, which include strain rate dependence. However, the results of the general micro-indentation test were affected by the microscopic scale of materials (e.g., surface roughness, and crystal grain size distribution), since the displacement was small. In the present study, we develop the sharp millimeter indention expanded displacement without the microscopic scale of materials. Furthermore, the effect of displacement rate on the sharp millimeter indentation was evaluated using the quasi-static and impact indentation test. In this study, high purity aluminum, with 99.99 mass%, was selected as the material with strain rate dependence of strength. The quasi-static indentation test was performed using the universal testing machine at the displacement rate of 8.3×10-7 m/s, 8.3×10-6 m/s, and 8.3×10-5 m/s. The impact indention was carried out at the displacement rate of approximately 3×100 m/s. The loading curvature decreased with increasing displacement immediately after indentation, and then this value was convergent, regardless of the displacement rate. It was clear that this convergent value was affected by the displacement rate.

scholarly journals Reduced preload increases Mechanical Control (strain-rate dependence) of relaxation by modifying myosin kinetics

2021 ◽  
pp. 108909
Author(s):  
Brianna M. Schick ◽  
Hunter Dlugas ◽  
Teresa L. Czeiszperger ◽  
Alexandra R. Matus ◽  
Melissa J. Bukowski ◽  
...  
Keyword(s):  
Strain Rate ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Control Strain ◽  
Mechanical Control

scholarly journals Strain Rate Dependence of the Spall Strength of Steels

1997 ◽  
Vol 07 (C3) ◽  
pp. C3-951-C3-956 ◽  
Author(s):  
J. Buchar ◽  
S. Rolc ◽  
J. Hrebícek
Keyword(s):  
Strain Rate ◽  
Spall Strength ◽  
Rate Dependence ◽  
Strain Rate Dependence
Sign in / Sign up

Export Citation Format

Share Document