ASTM D5992-96(2024) PDF

ASTM D5992-96(2024) PDF

1.1This guide covers dynamic testing of vulcanized rubber and rubber-like (both hereinafter termed “rubber” or “elastomeric”) materials and products, leading from the definitions of terms used, through the basic mathematics and symbols, to the measurement of stiffness and damping, and finally through the use of specimen geometry and flexing method, to the measurement of dynamic modulus.

1.2This guide describes a variety of vibratory methods for determining dynamic properties, presenting them as options, not as requirements. The methods involve free resonant vibration, and forced resonant and nonresonant vibration. In the latter two cases the input is assumed to be sinusoidal.

1.3While the methods are primarily for the measurement of modulus, a material property, they may in many cases be applied to measurements of the properties of full-scale products.

1.4The methods described are primarily useful over the range of temperatures from −70°C to +200°C (−100°F to +400°F) and for frequencies from 0.01 to 100 Hz. Not all instruments and methods will accommodate the entire ranges.

1.5When employed for the measurement of dynamic modulus, the methods are intended for materials having complex moduli in the range from 100 to 100 000 kPa (15 to 15 000 psi) and damping angles from 0 to 90°. Not all instruments and methods will accommodate the entire ranges.

1.6Both translational and rotational methods are described. To simplify generic descriptions, the terminology of translation is used. The subject matter applies equally to the rotational mode, substituting “torque” and “angular deflection” for “force” and “displacement.”

1.7This guide is divided into sections, some of which include:

Section Terminology and Symbols  3 Factors Influencing Dynamic Measurement  7 Test Methods and Specimens  8 Nonresonant Analysis Methods and Their Influence on

Results  9 Report 10 Mechanical and Instrumentation Factors Influencing Dynamic Measurement Annex A1 Guide to Further Reading Appendix X1 Double-Shear Specimens-Derivation of Equations and Descriptions of Specimens Appendix X2 Torsion Specimens-Derivation of Equations and Descriptions of Specimens Appendix X3 Compression/Tension Specimens-Derivation of Equations and Descriptions of Specimens Appendix X4 Free Resonant Vibration-Equations for Log Decrement and Stiffness Appendix X5 Obtaining Loss Factor and Elastic Stiffness from Transmissibility Curves Appendix X6

1.8The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.9This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.10This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.