Edward C Gilliam Deceased1604 Aldersgate, Northampton, NY 11901

3969930, Jul 20, 1976

Apr 10, 1975

5/567144

Dusan Ciril Prevorsek - Morristown NJ
Young Doo Kwon - Morristown NJ
Raj Kumar Sharma - Morristown NJ
Edward T. Gilliam - Lake Hiawatha NJ

Allied Chemical Corporation - Morris Township NJ

G01N 334

73 91

An apparatus and method for testing viscoelastic solids, such as tire cord. The apparatus includes: a holding means, a pretension means, a displacement generator, and a mechanical-electrical transforming means. The holding means holds the material in a predetermined position. The pretension means applies tension during testing. The displacement generator has an eccentric means for applying cyclic displacement. The mechanical-electrical transforming means transforms mechanical motion into electrical signals, such as a stress signal, a strain signal and a differentiated strain signal. There is a phase lag between the stress signal and the strain signal and the phase lag may vary in amount and direction as a function of time. The apparatus may also include: an integrating means for integration of a stress-strain hysteresis loop; and a display means for displaying an output of the integrating means to measure the area of the hysteresis loop and thereby determine energy loss. The method includes: applying strain to the material, with resulting stress developed in the material; transforming the strain into an electrical strain signal having a strain wave form; transforming the resulting stress into an electrical stress signal having a stress wave form; controlling the strain to produce a substantially sinusoidal strain wave form representing strain; and allowing the stress to produce a stress wave form representing stress which may be non-sinusoidal or sinusoidal.