标准摘要
[中文适用范围]： ISO 18437 的这一部分规定了测量聚合物（橡胶状和粘性聚合物、以及硬质塑料）材料在很宽的频率和温度范围内。 测量通过动态刚度方法进行，该方法使用来自连接到测试件的传感器的电信号。 这些信号与作用在测试件上的动态力以及由于这些力的作用而在测试件中产生的应变成比例。 测量频率范围由试件的尺寸、动态模量测量所需的精度、振动发生器的刚度与试件的刚度之间的关系以及所用测试夹具的共振特性决定。 ISO 18437本部分提出的方法允许在试件允许的任何静态预载荷（包括在不同静载荷下具有非线性特性的试件）下进行测量，但在小的动态（声学）应变下，即在测试件的线性特性不扭曲的限度内。 根据预载条件，模量之间的关系是唯一的。 [外文原描述]： ISO 18437-4:2008 specifies a direct method for measuring the complex dynamic moduli of elasticity (the Young, shear and bulk moduli, and their respective loss factors corresponding to the tensile, shear and all compressive strains) for polymeric (rubbery and viscous polymers, as well as rigid plastics) materials over a wide frequency and temperature range. Measurements are performed by the dynamic stiffness method, which uses electric signals from sensors attached to a test piece. These signals are proportional to the dynamic forces 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 the dynamic modulus measurements, the relationship between the stiffness of the oscillation generator and the stiffness of the test piece, and by the resonance characteristics of the test fixture used. The method presented in ISO 18437-4:2008 allows measurement under any static pre-load allowed for the test piece (including the test piece having the non-linear characteristics under different static loads), but under small 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.
英文名称Mechanical vibration and shock — Characterization of the dynamic mechanical properties of visco-elastic materials — Part 4: Dynamic stiffness method