圧縮試験によるゴムの多軸力学特性の測定性能

抄録

Material testing of rubber requires the measurement of uniaxial and multiaxial properties, but multiaxial property measurement requires a dedicated testing machine. Therefore, the measurement of multiaxial properties by compression testing is discussed.The compression test is one of the test methods to measure the mechanical properties of rubber. The compressive load-strain relationship in compression tests may vary depending on the friction coefficient and Poisson's ratio, so care must be taken when applying the relationship to the identification of material constants. In this study, numerical experiments using FEM analysis were conducted using JIS compression tests as an example to investigate the dependence of the measurement results on each property. As a result, it was confirmed that the measurement results up to 25% compressive strain were independent of these properties in compression tests under conditions that most rubber materials satisfy (Poisson's ratio of 0.495 or higher and friction coefficient of 0.75 or higher). It was also confirmed that under those conditions, the compression test could measure differences due to multiaxial properties.