Optimal determination of the material symmetry axes and associated elasticity tensor from ultrasonic velocity data

1997 ◽  
Vol 102 (3) ◽  
pp. 1503-1521 ◽  
Author(s):  
Christophe Aristégui ◽  
Stéphane Baste
Keyword(s):  
Ultrasonic Velocity ◽  
Elasticity Tensor ◽  
Material Symmetry ◽  
Velocity Data

Ultrasonic velocity determination of the phase diagram of UPt3

1991 ◽  
Vol 169 (1-4) ◽  
pp. 493-494 ◽  
Author(s):  
S.W. Lin ◽  
Q.Z. Ran ◽  
S. Adenwalla ◽  
Z. Zhao ◽  
J.B. Ketterson ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Ultrasonic Velocity

scholarly journals Determination of Ethanol and Extract Concentration in Sake by Ultrasonic Velocity Meter

1988 ◽  
Vol 83 (6) ◽  
pp. 416-419 ◽  
Author(s):  
Kyoichi KONDO ◽  
Hideo MISHIMA ◽  
Shigezo TAKEMURA ◽  
Kazuo SATO ◽  
Kiyoshi YOSHIZAWA
Keyword(s):  
Ultrasonic Velocity ◽  
Extract Concentration

scholarly journals Calculation of thin isotropic shells beyond the elastic limit by the method of elastic solutions

2018 ◽  
Vol 196 ◽  
pp. 01014 ◽  
Author(s):  
Avgustina Astakhova
Keyword(s):  
Elastic Limit ◽  
Physical Nonlinearity ◽  
Elasticity Tensor ◽  
Thin Shells ◽  
Equilibrium Equations ◽  
Spherical Shells ◽  
Plastic Deformations ◽  
Elastic Plastic ◽  
Internal Forces

The paper focuses on the model of calculation of thin isotropic shells beyond the elastic limit. The determination of the stress-strain state of thin shells is based on the small elastic-plastic deformations theory and the elastic solutions method. In the present work the building of the solution based on the equilibrium equations and geometric relations of linear theory of thin shells in curved coordinate system α and β, and the relations between deformations and forces based on the Hirchhoff-Lave hypothesis and the small elastic-plastic deformations theory are presented. Internal forces tensor is presented in the form of its expansion to the elasticity tensor and the additional terms tensor expressed the physical nonlinearity of the problem. The functions expressed the physical nonlinearity of the material are determined. The relations that allow to determine the range of elastic-plastic deformations on the surface of the present shell and their changing in shell thickness are presented. The examples of the calculation demonstrate the convergence of elastic-plastic deformations method and the range of elastic-plastic deformations in thickness in the spherical shell. Spherical shells with the angle of half-life regarding 90 degree vertical symmetry axis under the action of equally distributed ring loads are observed.

Determination of the Ultrasonic Velocity on a Recent and Aged Pine Wood

2021 ◽  
Author(s):  
Héctor Carreon ◽  
Mayra Carrillo
Keyword(s):  
Ultrasonic Velocity ◽  
Research Work ◽  
Physical And Mechanical Properties ◽  
Degradation Process ◽  
Ultrasonic Transducers ◽  
Center Frequency ◽  
Ultrasonic Emission ◽  
Significant Mass

Abstract Aging in wood is the inevitable modification of physical and mechanical properties due to deterioration caused by different factors such as organisms that destroy wood, photodegradation, weathering or long-term loading. During the wood degradation process, significant mass, stiffness and strength are lost. Therefore, it is relevant to monitor the wood decomposition process to guarantee the structural requirements in buildings. This research work aims to report the influence of degradation in wood due to deterioration through the use of ultrasonic measurements. Longitudinal and transverse ultrasonic velocities were calculated using the ultrasonic emission-transmission technique for aged and unaged Mexican pine (Pinus Strobus) wood. The experimental measurements were carried out using longitudinal and shear wave ultrasonic transducers with a center frequency of 1.0 MHz and 0.5MHz respectively. Scanning electron microscopy (SEM) was performed to establish a direct correlation with the behavior of the ultrasonic wave developed in naturally aged and unaged wood. Measurements revealed higher ultrasonic velocity values for unaged wood samples in longitudinal, tangential and radial directions compared to aged wood samples, but no significant differences were found in all other wood directions.

Determination of the effective elasticity tensor of a folded sandwich core

PAMM ◽  
2014 ◽  
Vol 14 (1) ◽  
pp. 535-536
Author(s):  
Holger Massow ◽  
Wilfried Becker
Keyword(s):  
Elasticity Tensor ◽  
Effective Elasticity ◽  
Sandwich Core
Sign in / Sign up

Export Citation Format

Share Document