基于Arrhenius方程氯丁胶管内胶应力-应变曲线预测及其扣压性能的计算仿真

Prediction of Stress-Strain Curve of Chloroprene Rubber Hose Based on Arrhenius Equation and Simulation of Its Swaging Performance

探索了胶管氯丁胶内胶经热油老化一定时间后应力-应变曲线变化趋势,基于Arrhenius方程预测其高温热油环境下老化一定时间后的一定形变下应力状态,预测结果表明:在高温125℃(398K)热油老化3~5月时,内胶最大应力及最大应变均呈下降趋势。将预测所得应力-应变曲线作为材料参数导入大型非线性有限元软件Abaqus中,计算仿真其静刚度与单元应力状态,仿真计算结果表明:热油老化一定时间后,胶管扣压内胶静刚度减小,使用时间6月时,内胶节点应力达到材料参数最大应力,内胶破损,漏油风险增大。

The change trend of stress-strain curve of chloroprene rubber inner rubber after aging in hot oil for a certain time was explored.Based on Arrhenius equation,the stress state was predicted under certain deformation after aging in high temperature hot oil environment for a certain period of time.The prediction results showed that the maximum stress and maximum strain of the inner rubber showed a downward trend at high temperature of 125℃(398 K)for 3—5 months.The stress-strain curve was imported into ABAQUS as a material parameter,and the static stiffness and element stress state were calculated and simulated.The simulation results showed that after a certain time of hot oil aging,the static stiffness of the inner rubber in the rubber hose was reduced,and when it was used for 6 months,the joint stress of the inner rubber reached the maximum stress of the material parameters,and the risk of internal rubber damage and oil leakage increased.