当前位置: X-MOL 学术J. Constr. Steel Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Fatigue life evaluation of high-strength steel wires with multiple corrosion pits based on the TCD
Journal of Constructional Steel Research ( IF 4.1 ) Pub Date : 2021-08-20 , DOI: 10.1016/j.jcsr.2021.106913
Chao Chen 1 , Zhiyu Jie 1 , Kainan Wang 1
Affiliation  

The stay cable composed of high-strength steel wires is susceptible to external corrosion during service, and multiple pitting damage will occur on the surface of steel wires. For the sake of simplifying the pitting morphology, this paper used artificial notches to simulate corrosion pits, and the fatigue properties of high-strength steel wires with multiple notches were systematically studied. First, fatigue tests of steel wires with multiple pits were performed, and the finite element models were established by ABAQUS software. The fitting equations related to stress concentration factor (SCF) and corrosion pit parameters were obtained. Subsequently, the fatigue life of corroded high-strength steel wires was predicted by the Point method (PM) and the Line method (LM) originated from the Theory of Critical Distances (TCD). Finally, the prediction results compared with the experimental results. The results show that the fatigue life of steel wires with a single pit is mainly related to the pit depth-to-length ratio. The fatigue life of steel wires with double pits located on the same side mainly depends on deeper pits, but it slightly decreases as the increase of the depth of shallow pits. The effect of the spacing of double pits is very small. The fatigue life of steel wires with double pits in the circumferential direction decreases as the angle between the double pits increases. The reliability of the TCD for fatigue evaluation of multi-notch components is verified.



中文翻译:

基于TCD的多蚀坑高强钢丝疲劳寿命评价

由高强度钢丝构成的斜拉索在使用过程中容易受到外部腐蚀,钢丝表面会出现多处点蚀损伤。为简化点蚀形态,本文采用人工缺口模拟腐蚀点,系统研究了多缺口高强钢丝的疲劳性能。首先对多凹坑钢丝进行疲劳试验,利用ABAQUS软件建立有限元模型。得到了与应力集中系数(SCF)和腐蚀坑参数相关的拟合方程。随后,基于临界距离理论 (TCD) 的点法 (PM) 和线法 (LM) 预测了腐蚀高强度钢丝的疲劳寿命。最后,预测结果与实验结果对比。结果表明,单凹坑钢丝的疲劳寿命主要与凹坑深长比有关。同侧双坑钢丝的疲劳寿命主要取决于较深的坑,但随着浅坑深度的增加略有下降。双坑间距的影响很小。周向双凹坑钢丝的疲劳寿命随着双凹坑间夹角的增大而降低。验证了TCD用于多缺口部件疲劳评估的可靠性。同侧双坑钢丝的疲劳寿命主要取决于较深的坑,但随着浅坑深度的增加略有下降。双坑间距的影响很小。周向双凹坑钢丝的疲劳寿命随着双凹坑间夹角的增大而降低。验证了TCD用于多缺口部件疲劳评估的可靠性。同侧双坑钢丝的疲劳寿命主要取决于较深的坑,但随着浅坑深度的增加略有下降。双坑间距的影响很小。周向双凹坑钢丝的疲劳寿命随着双凹坑间夹角的增大而降低。验证了TCD用于多缺口部件疲劳评估的可靠性。

更新日期:2021-08-21
down
wechat
bug