Self-heating and dynamic mechanical behavior of isotropic silicone rubber composite (SRC) filled with micro-sized carbonyl iron particles (CIPs) subjected to cyclic compressive loading have been studied. Effects of pre-strains from 5 to 20%, strain amplitudes from 1 to 5%, and excitation frequencies from 10 to 50 Hz on the self-heating and dynamic mechanical response of the isotropic SRC were investigated. The self-heating temperatures were measured on the surface and at the center of cylindrical SRC specimens. The self-heating temperatures of the isotropic SRC samples showed a fast increase in an initial transient stage and the following isothermal stage. The temperature distribution in the isotropic SRC specimens was non-homogeneous and the temperature decreased from the center to sample edges. The self-heating temperatures of the isotropic SRC increased gradually with raising the strain amplitude and frequency. However, the difference between the internal and surface temperatures was slight for low strain amplitudes and frequencies, while it was significant for high strain amplitudes and frequencies. The temperatures of the isotropic SRC boosted rapidly with increasing the pre-strain to 10% and thereafter gained slightly. Although the isotropic SRC dynamic moduli reduced with the rise of the strain amplitude, they enhanced with increasing the pre-strain and frequency. Besides, the storage modulus of the isotropic SRC varied slightly with time, while the loss modulus reduced markedly especially at the initial period. The decrease in the loss modulus of the isotropic SRC under cyclic compressive loading is attributed to its self-heating temperature rise. A finite element simulation of the heat transfer in the SRC cylinder was conducted. The calculated temperatures in the SRC cylinder were in good agreement with the measured ones at different strain amplitudes and frequencies.

研究了填充微尺寸羰基铁颗粒 (CIP) 的各向同性硅橡胶复合材料 (SRC) 在循环压缩载荷下的自热和动态力学行为。研究了 5% 到 20% 的预应变、1% 到 5% 的应变幅度和 10 到 50 Hz 的激励频率对各向同性 SRC 的自热和动态机械响应的影响。自热温度是在圆柱形 SRC 试样的表面和中心测量的。各向同性 SRC 样品的自加热温度在初始瞬态阶段和随后的等温阶段显示出快速升高。各向同性 SRC 试样中的温度分布不均匀，温度从中心到样品边缘降低。随着应变幅值和频率的增加，各向同性 SRC 的自热温度逐渐升高。然而，对于低应变幅度和频率，内部和表面温度之间的差异很小，而对于高应变幅度和频率则显着。随着预应变增加到 10%，各向同性 SRC 的温度迅速升高，然后略有上升。尽管各向同性 SRC 动态模量随着应变幅值的增加而减小，但它们随着预应变和频率的增加而增强。此外，各向同性 SRC 的储能模量随时间略有变化，而损耗模量显着降低，尤其是在初始阶段。循环压缩载荷下各向同性 SRC 损耗模量的降低归因于其自热温升。对 SRC 气缸中的传热进行了有限元模拟。SRC 圆柱体中的计算温度与不同应变幅度和频率下的测量温度非常吻合。