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Dynamic testing of rubber.

The AYO-IV (Yerzley mechanical oscillograph) testing machine for dynamic testing of rubber is available from the company. Tangent of delta (tan delta) quantifies the way a material absorbs and returns mechanical energy. It is a measure of the out-of-phase time relationship between an impact and the resultant force transmitted to the supporting body. Materials that show the highest phase shift, approaching 90[degrees], are said to have the highest capability to dissipate energy. Tan delta is an indication of the material's effectiveness in damping vibrations. The higher the tan delta, the greater the damping coefficient, the more effecient the material will be in effectively accomplishing energy absorption and dispersal, according to the manufacturer. With the installation of a load cell, AYO-IV now measures tan delta directly in seconds. The ASTM D 945-16 test method calls for the use of the AYO-IV to characterize the mechanical properties. (Tavdi)

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Title Annotation:Instruments
Publication:Rubber World
Date:Jun 1, 2018
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