热老化氧化铈填充硫化天然橡胶单轴疲劳有限元研究

Finite Element Analysis of Thermal Aging Fatigue of Cerium Oxide-modified Vulcanized Natural Rubber

通过加速热老化方式在60℃、80℃、100℃下对氧化铈填充硫化天然橡胶进行了24h的热老化处理,并且对热老化后的橡胶试件进行了单轴疲劳试验.提取并采用疲劳试验结果中应变范围0-175%的单轴拉伸数据,在等效应力状态推导下获得相应的等双轴数据,利用FEA软件建立了可以有效地描述氧化铈填充硫化天然橡胶热老化后材料属性的有限元模型,根据疲劳加载条件模拟获得的应力计算结果与试验结果偏差在10%以内,为下一步的疲劳寿命预测提供可靠的数据模型支持.

In this paper,cerium oxide-modified vulcanized natural rubber was treated by artificially accelerated thermal aging at 60℃,80℃and 100℃for 24h and uniaxial fatigue test of rubber specimens after thermal aging was carried out.The uniaxial tensile data within the strain range of 0-175%in the fatigue test results were extracted and the equal biaxial data were obtained under the condition of equal-effect force states.The finite element model of the material properties after the thermal aging of cerium oxide-modified vulcanized natural rubber can be effectively described by using the FEA software.According to the fatigue loading condition,the deviation between the stress calculation results and the test results is less than 10%,which provides reliable data model support for the next step of fatigue life prediction.