Results of a Round Robin Test Program: Complex Modulus Properties of a Polymeric Damping Material
Final rept. Oct 1986-May 1992
WRIGHT LAB WRIGHT-PATTERSON AFB OH
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This report describes the results of a Round Robin test program to evaluate the complex modulus behavior of a typical polymeric damping material, as measured by several different test methods and organizations. The results are analyzed in several different ways, namely wicket plot analysis, temperature by temperature plots of moduli and loss factors versus frequency and frequency- temperature reduced variables master plots. It is determined that all the test methods used are capable of producing accurate results, but that conditions arise in each case where erroneous results are encountered. These conditions represent extreme values of the specimen stiffness high or low, system frequencies, usually high or situations where small differences between large numbers occur. These conditions define natural limits for each test method and specimen configuration and dimensions. The identification of these limits, and the role of specimen dimension choices in defining the limit boundaries will be invaluable for future testing by each of the test methods and systems examined.. .. Round Robin, Polymers, Damping, Test methods, Complex moduli, Frequency, Temperature, Accuracy.
- Polymer Chemistry
- Test Facilities, Equipment and Methods
- Fluid Mechanics