摘要
研究了 (± 20° )钢丝帘线 /橡胶复合材料在单级和两级拉伸循环载荷下疲劳损伤的累积规律。结果表明：在载荷控制的疲劳过程中，材料的周期最大应变发展曲线呈现明显的三阶段规律；疲劳寿命与最大应力近似呈对数线性关系。各级载荷下，周期最大应变发展曲线都具有线性稳定增长的第二阶段。两级加载实验初步证明 Palmgren－ Minner法则仅适用于第一级疲劳条件比第二级疲劳条件轻缓的情况。
The fatigue damage accumulation of (±20°) laminated steel-cord rubber composite under step 1 and step 2 T- T loading was studied. The results indicated that the increase in the maximum strain exhibited three - stage tendency in the process of fatigue. The fatigue life was linear to the logarithmic maximum stress. Under both step 1 and step 2 loading, the second stage of the variation curve of cyclic maximum strain followed a linear trend, demonstrating that the inner damage of the material growthed steadily with loading cycles. Step 2 loading experiment showed that the Palmgren - Minner law was applicable only to the condition in which the step 2 fatigue loading was severer than the first one.
出处
《合成橡胶工业》
EI
CAS
CSCD
北大核心
2001年第3期166-168,共3页
China Synthetic Rubber Industry
基金
黑龙江省自然科学基金资助项目!(98A15)
