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Development of procedures for calculating stiffness and damping properties of elastomers in engineering applications. Part 2: Elastomer characteristics at constant temperatureDynamic properties of a commerical polybutadiene compound were determined at a constant temperature of 32 C by a forced-vibration resonant mass type of apparatus. The constant thermal state of the elastomer was ensured by keeping the ambient temperature constant and by limiting the power dissipation in the specimen. Experiments were performed with both compression and shear specimens at several preloads (nominal strain varying from 0 to 5 percent), and the results are reported in terms of a complex stiffness as a function of frequency. Very weak frequency dependence is observed and a simple power law type of correlation is shown to represent the data well. Variations in the complex stiffness as a function of preload are also found to be small for both compression and shear specimens.
Document ID
19740026255
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Gupta, P. K. (Mechanical Technology, Inc. Latham, NY, United States)
Tessarzik, J. M. (Mechanical Technology, Inc. Latham, NY, United States)
Cziglenyi, L. (Mechanical Technology, Inc. Latham, NY, United States)
Date Acquired
September 3, 2013
Publication Date
April 26, 1974
Subject Category
Structural Mechanics
Report/Patent Number
MTI-74TR20-PT-2
NASA-CR-134704
Accession Number
74N34368
Funding Number(s)
CONTRACT_GRANT: NAS3-15334
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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