Page 79 - 《摩擦学学报》2020年第6期

第 40 卷 第 6 期 摩 擦 学 学 报 Vol 40 No 6
2020 年 11 月 Tribology Nov, 2020

DOI: 10.16078/j.tribology.2020085

定、变载弯曲疲劳钢丝绳失效机理对比研究

1,2*
1,2
1,2
王大刚 , 张 俊 , 朱辉龙 , 张德坤 1,2
(1. 中国矿业大学 机电工程学院，江苏 徐州 221116;
2. 江苏省矿山智能采掘装备协同创新中心(省部共建)，江苏 徐州 221116)
摘 要: 为对比揭示定、变载弯曲疲劳钢丝绳断裂机理及磨损演化特性，运用自制钢丝绳弯曲疲劳试验机开展钢丝
绳定载、变载弯曲疲劳试验，通过人工拆股统计法和VW-9000系列高速度数码显微系统对比研究钢丝绳断丝分布、
断丝数、断口和磨痕形貌等断裂机理，对比分析钢丝绳未断钢丝和断丝的磨痕尺寸演化特性. 结果表明：与钢丝绳
定载弯曲疲劳相比，变载弯曲疲劳钢丝绳断丝出现较晚，芯股、螺旋股外层断丝数分别较多、较少，芯股外层钢丝断
口挤压变形较大，芯股各层钢丝断口裂纹扩展区占比较低，芯股和螺旋股的各层钢丝磨痕尺寸总体较小，钢丝绳更
易达到报废水平.
关键词: 钢丝绳; 定载弯曲疲劳; 动载弯曲疲劳; 断裂机理; 磨损演化
中图分类号: TH117.1 文献标志码: A 文章编号: 1004-0595(2020)06–0762–12

Comparative Research on Failure Mechanisms of Steel Wire Ropes
during Bending Fatigue under Constant and Variable Loads

1,2* 1,2 1,2 1,2
WANG Dagang , ZHANG Jun , ZHU Huilong , ZHANG Dekun

(1. School of Mechatronic Engineering, China University of Mining and Technology, Jiangsu Xuzhou 221116, China
2. Jiangsu Province and Education Ministry Co-sponsored Collaborative Innovation Center of
Intelligent Mining Equipment, Jiangsu Xuzhou 221116, China)
Abstract: In order to comparatively reveal fracture mechanisms and wear evolution characteristics of steel wire ropes
during bending fatigue under constant and variable loads, the self-made bending fatigue test rig of steel wire rope was
employed to carry out bending fatigue tests of steel wire ropes under constant and variable loads. The statistical method
by disassembling strands manually and VW-9000 series high-speed digital micro system were employed to
comparatively investigate distributions and number of fractured wires, morphologies of fractures and wear scars at
fractures of steel wires, evolutions of wear scar dimensions of unfractured and fractured wires in the rope. The results
showed that as compared to bending fatigue of steel wire rope under the constant load, the bending fatigue of steel wire
rope under the variable load presented later occurrences of fractured wires, more and fewer fractured wires in the outer
layers of core and outer strands, respectively, larger extrusion deformations at fractures of outer layer wires in the core
strand, lower ratios of crack propagation zones at fractures of steel wires at various layers in the core strand, overall
smaller dimensions of wear scars of steel wires in various layers, and easier discarding of steel wire rope.
Key words: steel wire rope; bending fatigue under the constant load; bending fatigue under the variable load; fracture
mechanism; wear evolution

Received 16 May 2020, revised 1 July 2020, accepted 22 July 2020, available online 28 November 2020.
*Corresponding author. E-mail: wangdg@cumt.edu.cn, Tel: +86-15162110590.
The project was supported by the National Natural Science Foundation of China (51875565), China Postdoctoral Science Foundation
Funded Project (2019M652001), A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education
Institutions, Top-Notch Academic Programs Project of Jiangsu Higher Education Institutions.
国家自然科学基金面上项目(51875565)，中国博士后科学基金面上项目(2019M652001)，江苏高校优势学科建设工程项目和江
苏省高校品牌专业建设工程项目资助.