基于断裂力学的钢丝缠绕胶管疲劳寿命分析

Fatigue Life Analysis of Steel Wire Winding Rubber Hose Based on Fracture Mechanics

建立钢丝缠绕胶管的三维有限元模型,基于橡胶材料疲劳裂纹扩展理论,选取钢丝缠绕角度、钢丝层间距、钢丝层数、钢丝直径4个结构参数,采用正交试验法,以橡胶材料疲劳寿命为依据,分析在交变负荷下胶管的疲劳寿命和最大轴向位移。结果表明:钢丝层间距对胶管疲劳寿命的影响最大,其次是钢丝缠绕角度,再次是钢丝层数,最小是钢丝直径;钢丝层数对胶管最大轴向位移的影响最大,其次是钢丝缠绕角度,再次是钢丝层间距,最小是钢丝直径。

A 3D finite element model of steel wire winding rubber hose was established.Based on the theory of the fatigue crack growth of rubber material,four structural parameters of the winding angle of steel wire,spacing between steel wire layers,number of steel wire layers and diameter of steel wire were selected,and on account of fatigue life of rubber material,the fatigue life and maximum axial displacement of the rubber hose under alternating load were analyzed by orthogoncal test method.The results showed that the spacing between steel wire layers had the greatest influence on the fatigue life of the rubber hose,followed by the winding angle of steel wire,the number of steel wire layers and diameter of steel wire.The number of the steel wire layers had the greatest influence on the maximum axial displacement of the rubber hose,followed by the winding angle of steel wire,spacing between steel wire layers and diameter of steel wire.