ASTM D 945 - 06 Standard Test Methods for Rubber Properties in Compression or Shear (Mechanical Oscillograph)

American Society for Testing and Materials (ASTM). Current edition approved July 1, 2006. Published July 2006. Originally approved
in 1948. Last previous edition approved in 2001 as D 945 – 92 (2001)e1. These test methods cover the use of the Yerzley mechanical
oscillograph for measuring mechanical properties of rubber vulcanizates in the generally small range of deformation
that characterizes many technical applications. These properties include resilience, dynamic modulus, static modulus,
kinetic energy, creep, and set under a given force. The test is applicable primarily, but not exclusively, to
materials having static moduli at the test temperature such that forces below 2 MPa (280 psi) in compression or 1 MPa
(140 psi) in shear will produce 20 % deformation, and having resilience such that at least three complete cycles are produced
when obtaining the damped oscillatory curve. The range may be extended, however, by use of supplementary masses and
refined methods of analysis. Materials may be compared either under comparable mean stress or mean strain conditions.