Determination of the rheological behavior of epoxy-amine thermosets by dynamic mechanical analysis: Isothermal methods versus nonisothermal methods

2003 ◽  
Vol 41 (17) ◽  
pp. 1965-1977 ◽  
Author(s):  
J. M. Cuevas ◽  
J. M. Laza ◽  
M. Correa ◽  
J. L. Vilas ◽  
M. Rodríguez ◽  
...  
Keyword(s):  
Dynamic Mechanical Analysis ◽  
Rheological Behavior ◽  
Mechanical Analysis ◽  
Dynamic Mechanical ◽  
Epoxy Amine

scholarly journals Temperature Variability of Poisson’s Ratio and Its Influence on the Complex Modulus Determined by Dynamic Mechanical Analysis

Technologies ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 81
Author(s):  
Vitor Carneiro ◽  
Helder Puga
Keyword(s):  
Dynamic Mechanical Analysis ◽  
Poisson’S Ratio ◽  
Complex Modulus ◽  
Mechanical Analysis ◽  
Temperature Variability ◽  
Poisson's Ratio ◽  
Constant Frequency ◽  
Dynamic Mechanical ◽  
Characterization Of Materials

Dynamic mechanical analysis (DMA) is the usual technology for the thermomechanical viscoelastic characterization of materials. This method monitors the instant values of load and displacement to determine the instant specimen stiffness. Posteriorly, it recurs to those values, the geometric dimensions of the specimen, and Poisson’s ratio to determine the complex modulus. However, during this analysis, it is assumed that Poisson’s ratio is constant, which is not always true, especially in situations where the temperature can change and promote internal modification in the specimens. This study explores the error that is imposed in the results by the determination of the real values of complex moduli due to variable Poisson’s ratios arising from temperature variability using a constant frequency. The results suggest that the evolution of the dynamic mechanical analysis should consider the Poisson’s ratio input as a variable to eliminate this error in future material characterization.

Elastic Modulus Determination of ß-Si6-xAlxOxN8-x with Rare Earth Concentrate by Dynamic Mechanical Analysis

2003 ◽  
Vol 416-418 ◽  
pp. 579-583 ◽  
Author(s):  
I.R. Ruiz ◽  
Hidetoshi Takiishi ◽  
Rubens Nunes de Faria Jr. ◽  
Luis Filipe C.P. de Lima ◽  
José Carlos Bressiani
Keyword(s):  
Rare Earth ◽  
Elastic Modulus ◽  
Dynamic Mechanical Analysis ◽  
Mechanical Analysis ◽  
Dynamic Mechanical
Sign in / Sign up

Export Citation Format

Share Document