摘要
针对整体吊弦弯曲疲劳寿命,从吊弦钳压管处局部应力和承载电流两方面提出优化方案。利用模型仿真分析钳压管的局部应力对吊弦断裂行为的影响和规律;基于承载电流引发的电致塑效应进行力-电耦合实验,采用扫描电子显微镜(SEM)、X射线能谱分析仪(EDS)和金相组织观察等微观试验手段,研究吊弦断裂过程中承载电流的作用机理。试验结果表明,过载电流是加速吊弦疲劳断裂的重要原因。试验为优化整体吊弦疲劳寿命提供了可靠的实验基础和实验依据。
Targeting at the bending fatigue life of integrated dropper,this paper proposed an optimization scheme for both local stress and carrying current at the clamp tube of the dropper.The influence and rule of the plastic deformation of the clamp tube on the fracture behavior of the dropper were analyzed by model simulation;the force-electric coupling experiment was carried out based on the electroplastic effect induced by the carrying current and the microscopic morphology of the fractured dropper was analyzed by scanning electron microscope(SEM).X-ray energy dispersive analyzer(EDS)fracture composition analysis,and microscopic test methods such as metallographic tissue observation to study the mechanism of the current carrying current in the process of dropper fracture.The test results show that overload current is an important reason for accelerating the fatigue fracture of the dropper.The test provides a reliable experimental basis and experimental basis for optimizing the fatigue life of the overall dropper.
作者
王玉生
吴文江
李灿阳
牟观汇
孙洪勇
Wang Yusheng;Wu Wenjiang;Li Canyang;Mu Guanhui;Sun Hongyong(School of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)
出处
《石家庄铁道大学学报（自然科学版）》
2022年第3期104-110,共7页
Journal of Shijiazhuang Tiedao University(Natural Science Edition)
基金
河北省自然科学基金(E2017210166)。
关键词
吊弦
钳压管
承载电流
断口形貌
dropper
clamp tube
carrying current
fracture morphology
