橡胶复合材料疲劳破坏特性

FATIGUE DAMAGE PROPERTIES OF RUBBER COMPOSITES

  • 摘要: 分别对00 和 ±200 橡胶复合材料在拉伸循环载荷下的疲劳损伤进行了实验研究。两类材料的周期最大应变随循环周次的变化遵循三阶段规律, 三个阶段对应着疲劳损伤从萌生、稳定扩展到加速扩展直至整体破坏的过程。单层和双层材料的疲劳破坏分别为帘线控制和基体控制。实验表明, 用加载最大应力表征的疲劳寿命与循环周次的对数近似成线性关系。疲劳过程中材料的滞后损失基本保持不变。滞后损失和导热系数的差异是造成不同种类试件表面温升差异的主要原因。

     

    Abstract: The fatigue damage properties of 00 single2ply and ±200 double-ply rubber composite under T-T loading were studied. The results show that the variation of the cycle strain of both kinds of material in the fatigue process exhibits three stages which are corresponding to damage initiation , steady damage propagation and catastrophic failure. Thefatigue damage is controlled by cord properties for the single-ply rubber composites and by matrix properties for the doubleply rubber composite respectively. The logarithmic fatigue life expressed by maximum stress follows a linear trend. Thehysteretic loss keeps constant until the end of the fatigue life. The difference between hysteretic loss and the thermoconductivity results in a difference in the surface temperature between different specimens.

     

/

返回文章
返回