K-0613 Control of Transient Thermoelastic Displacement in a Two-Layer Composite Disk Consisting of Transversely Isotropic and Piezoceramic Layers

2001 ◽  
Vol I.01.1 (0) ◽  
pp. 221-222
Author(s):  
Yuji YAMASHITA ◽  
Fumihiro ASHIDA ◽  
Seiichiro SAKATA
Keyword(s):  
Transversely Isotropic ◽  
Layer Composite ◽  
Composite Disk ◽  
Thermoelastic Displacement

Piezoelectric control of a transient thermoelastic displacement distribution in a composite disk

2018 ◽  
Vol 41 (10-12) ◽  
pp. 1558-1576
Author(s):  
Fumihiro Ashida ◽  
Sei-ichiro Sakata ◽  
Takuya Morimoto ◽  
Hiroki Fujiwara
Keyword(s):  
Displacement Distribution ◽  
Piezoelectric Control ◽  
Composite Disk ◽  
Thermoelastic Displacement

CONTROL OF TRANSIENT THERMOELASTIC DISPLACEMENT IN A COMPOSITE DISK

2002 ◽  
Vol 25 (2) ◽  
pp. 99-121 ◽  
Author(s):  
Fumihiro Ashida ◽  
Theodore R. Tauchert
Keyword(s):  
Composite Disk ◽  
Thermoelastic Displacement

Ultrasonic velocity and anisotropy of hydrocarbon source rocks

Geophysics ◽  
1992 ◽  
Vol 57 (5) ◽  
pp. 727-735 ◽  
Author(s):  
Lev Vernik ◽  
Amos Nur
Keyword(s):  
Ultrasonic Velocity ◽  
Transversely Isotropic ◽  
Bedding Plane ◽  
Source Rocks ◽  
Small Scale ◽  
Velocity Measurements ◽  
Specific Distribution ◽  
Layer Composite ◽  
Confining Pressures ◽  
Intrinsic Anisotropy

An experimental study of the physical properties of black, kerogen‐rich shales, also including maturation analysis, scanning electron microscope (SEM) observations, and physical modeling, revealed fairly peculiar petrophysical parameters. Specifically, these rocks have very low porosity and density, but most importantly, both P and S ultrasonic velocities normal to bedding are extremely low, whereas they are much higher parallel to bedding, giving rise to a strong anisotropy even at high confining pressures. We found that these parameters primarily reflect kerogen content, microstructure, and maturation level of these rocks. We found also that microcracks inferred from ultrasonic velocity measurements occur only in mature shales. These microcracks are parallel to the bedding plane and further enhance strong intrinsic anisotropy, notably at low effective pressure. Our results show, that on a small scale, kerogen‐rich shales are transversely isotropic rocks and can be effectively modeled using the thin‐layer composite concept modified to account for the specific distribution of organic matter in the rock fabric.

Optimum Design of a Piezo-Composite Disk for Control of Thermoelastic Displacement Distribution

2007 ◽  
Vol 30 (6) ◽  
pp. 559-586 ◽  
Author(s):  
Fumihiro Ashida ◽  
Sei-ichiro Sakata ◽  
Theodore R. Tauchert ◽  
Shinji Yoshida
Keyword(s):  
Optimum Design ◽  
Displacement Distribution ◽  
Composite Disk ◽  
Thermoelastic Displacement
Sign in / Sign up

Export Citation Format

Share Document