Abstract
AbstractA compound pendulum system has been developed for the measurement and study of the modulus of elasticity and internal damping properties of a viscoelastic specimen through a range of temperatures.An analysis of the apparatus and the essential describing equations are presented. Test results for several materials are presented. In the region of the heat distortion temperature many materials exhibit a sharp peak in their damping characteristics. The modulus of elasticity drops rapidly in this region. Modulus of elasticity results obtained compare favorably with static testing machine data. The compound pendulum system described provides a simple technique for these physical property determinations continuously over a range of temperatures.
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