The energy dissipation characteristics of polyurea and polyurea/carbon black composites are determined under cycling loading at different amplitudes and excitation frequencies. These characteristics are measured experimentally and validated against the predictions of finite element models (FEM). Further validation of the energy dissipated is carried out by comparisons with the product of the storage modulus and the loss factor of the polymer as obtained from the measurement of the complex moduli using the Dynamic Mechanical Thermal Analyzer (DMTA). The obtained results indicate an excellent agreement between the experiments and the predictions of the FEM. Furthermore, it is observed that the energy dissipated per unit volume of pristine polyurea is, on average, about 10% higher than that of polyurea/carbon black composites.

聚脲和聚脲/炭黑复合材料的能量耗散特性是在不同振幅和激发频率下的循环载荷下确定的。这些特性是通过实验测量的，并根据有限元模型（FEM）的预测进行了验证。通过与使用动态机械热分析仪（DMTA）测量复数模量获得的聚合物的储能模量和损耗因子的乘积进行比较，可以进一步验证耗散的能量。获得的结果表明，实验与有限元预测之间有着极好的一致性。此外，观察到，每单位体积的原始聚脲平均耗散的能量比聚脲/炭黑复合材料的散发的能量平均高约10％。