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。
The fatigue damage properties of [0°] single-ply and [±20°] 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. The fatigue damage is controlled by cord properties for the single-ply rubber composites and by matrix properties for the double-ply rubber composite respectively. The logarithmic fatigue life expressed by maximum stress follows a linear trend. The hysteretic loss keeps constant until the end of the fatigue life. The difference between hysteretic loss and the thermal conductivity results in a difference in the surface temperature between different specimens.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2005年第1期32-35,共4页
Acta Materiae Compositae Sinica
基金
黑龙江省自然科学基金资助项目(A0309)
中国博士后科学基金资助项目
哈尔滨市科技攻关计划资助项目
关键词
橡胶复合材料
疲劳
损伤
滞后损失
Failure analysis
Fatigue of materials
Loads (forces)
Rubber compounding
Strain
Tensile testing
Thermal conductivity
