標準號：ISO 18437-4-2008
中文標準名稱：機械振動和沖擊.粘彈性材料動態機械性能的特性.第4部分:動態穩定度方法
英文標準名稱：Mechanical vibration and shock - Characterization of the dynamic mechanical properties of visco-elastic materials - Part 4: Dynamic stiffness method
標準類型：J04
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：J04
引用標準：ISO 472;ISO 483;ISO 2041;ISO 4664-1;ISO 6721-1;ISO 6721-4;ISO 6721-6;ISO 10112;ISO 10846-1;ISO 23529
適用范圍：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.