ISO 18437-4:2008 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

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

ISO 18437-4:2008规定了一种直接测量聚合物（橡胶和粘性聚合物，以及硬质塑料）材料在宽频率和温度范围内复杂动态弹性模量（杨氏模量、剪切模量和体积模量，以及对应于拉伸、剪切和所有压缩应变的各自损耗系数）的方法。通过动态刚度法进行测量，该方法使用连接到试件的传感器发出的电信号。这些信号与作用在试样上的动态力以及由于这些力的影响而在试样中产生的应变成比例。测量频率范围由试件尺寸、动态模量测量所需的精度、振动发生器刚度与试件刚度之间的关系以及所用试验夹具的共振特性决定。ISO 18437中介绍的方法-4:2008允许在试件允许的任何静态预载荷（包括在不同静态载荷下具有非线性特性的试件）下进行测量，但在小动态（声学）应变下进行测量，即在试件线性特性不变形的极限下。根据预加载条件，模量之间的关系是唯一的。

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.

标准预览图