Impulse Excitation: A Technique for Dynamic Modulus Measurement

2009 ◽  
pp. 90-90-10 ◽  
Author(s):  
JW Lemmens
Keyword(s):  
Dynamic Modulus ◽  
Impulse Excitation ◽  
Modulus Measurement

scholarly journals Evaluation of dynamic modulus measurement for C/C‐SiC composites at different temperatures

2019 ◽  
Vol 16 (5) ◽  
pp. 1723-1733 ◽  
Author(s):  
Sandrine Hönig ◽  
Dietmar Koch ◽  
Steffen Weber ◽  
Simon Etzold ◽  
Thorsten Tonnesen ◽  
...  
Keyword(s):  
Dynamic Modulus ◽  
Different Temperatures ◽  
Modulus Measurement ◽  
Sic Composites

Influence of Specimen Size on the Impulse Excitation Technique

2014 ◽  
Vol 633 ◽  
pp. 459-462 ◽  
Author(s):  
Chen Guang Wei ◽  
Yi Wang Bao ◽  
Zheng Quan Liu ◽  
Dong Wang
Keyword(s):  
Elastic Modulus ◽  
Resonance Frequency ◽  
Test Specimen ◽  
Ceramic Composite ◽  
Test Sample ◽  
Specimen Size ◽  
Testing Method ◽  
Impulse Excitation ◽  
Length Width ◽  
Modulus Measurement

The Impulse Excitation technique is a nondestructive and very convenient testing method. It could be applied at different circumstances such as high temperatures, low temperatures and controlled humidity. The Impulse Excitation technique is based on the analysis of the vibration of a test sample after it was impulse excited. The elastic properties of a test specimen are related to its mechanical resonance frequency. In this paper, the regular of resonance frequency changed with specimen’s size was discussed. Elastic modulus of glass with different length, width and thickness were measured, and ceramic composite material with small size was tested. The results indicate that the resonance frequency of specimen changed with its size regularly, and the specimen with small size has poor accuracy of elastic modulus measurement.

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