Characterization of elastic properties of pultruded profiles using model updating procedure with vibration test data

2008 ◽  
Vol 30 (4) ◽  
pp. 481-500
Author(s):  
Jesiel Cunha ◽  
Emmanuel Foltete ◽  
Noureddine Bouhaddi
Keyword(s):  
Elastic Properties ◽  
Test Data ◽  
Model Updating ◽  
Vibration Test ◽  
Updating Procedure

Dynamic Model Updating of Satellite Structure Using Vibration Test Data

2015 ◽  
Vol 798 ◽  
pp. 129-134
Author(s):  
Yao Qi Feng ◽  
Ze Yu Wang
Keyword(s):  
Model Reduction ◽  
Dynamic Model ◽  
Test Data ◽  
Model Updating ◽  
Central Cylinder ◽  
Vibration Test ◽  
Test Results ◽  
Engineering Applications ◽  
Satellite Structure ◽  
Selection Of

This paper presents the model updating technique for satellite structure by using the vibration environment test data. In the paper, several key technique issues related to the model updating of satellite structure, such as selection of updating parameters, model reduction, damping identification, etc, have been discussed. As an example, the model updating for a satellite central cylinder structure using the shaker vibration environment test results is described. It is proved that the techniques presented are effective for engineering applications.

Thermorheological Characterization of Elastoviscoplastic Carbopol Ultrez 20 Gel

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
M. A. Hassan ◽  
Manabendra Pathak ◽  
Mohd. Kaleem Khan
Keyword(s):  
Experimental Investigation ◽  
Yield Stress ◽  
Elastic Properties ◽  
Viscous Dissipation ◽  
Power Law ◽  
Effect Of Temperature ◽  
Rheological Parameters ◽  
Frequency Range ◽  
Power Law Index

The temperature and concentration play an important role on rheological parameters of the gel. In this work, an experimental investigation of thermorheological properties of aqueous gel Carbopol Ultrez 20 for various concentrations and temperatures has been presented. Both controlled stress ramps and controlled stress oscillatory sweeps were performed for obtaining the rheological data to find out the effect of temperature and concentration. The hysteresis or thixotropic seemed to have negligible effect. Yield stress, consistency factor, and power law index were found to vary with temperature as well as concentration. With gel concentration, the elastic effect was found to increase whereas viscous dissipation effect was found to decrease. Further, the change in elastic properties was insignificant with temperature in higher frequency range of oscillatory stress sweeps.

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