标准编号：ISO 18437-4:2008
中文名称：机械振动与冲击 粘弹材料动态机械性能的表征 第4部分：动态刚度法
英文名称：Mechanical vibration and shock — Characterization of the dynamic mechanical properties of visco-elastic materials — Part 4: Dynamic stiffness method
发布日期：2008-06
标准范围
This part of ISO 18437 specifies a direct method for measuring the complex dynamic moduli of elasticity (theYoung, shear and bulk moduli, and their respective loss factors corresponding to the tensile, shear and allcompressive strains) for polymeric (rubbery and viscous polymers, as well as rigid plastics) materials over awide frequency and temperature range. Measurements are performed by the dynamic stiffness method, whichuses electric signals from sensors attached to a test piece. These signals are proportional to the dynamicforces acting on the test piece and the strains in the test piece due to the effect of these forces.The measurement frequency range is determined by the size of test piece, the accuracy required on thedynamic modulus measurements, the relationship between the stiffness of the oscillation generator and thestiffness of the test piece, and by the resonance characteristics of the test fixture used.The method presented in this part of ISO 18437 allows measurement under any static pre-load allowed for thetest piece (including the test piece having the non-linear characteristics under different static loads), but undersmall dynamic (acoustic) strains, i.e., in limits where the linear properties of the test piece are not distorted.Depending on the pre-load conditions, the relation between the moduli is unique.
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