紧固成员材料和厚度对螺栓在横向负荷下自放松的影响
Rashique Iftekhar Rousseau1, Abdel-Hakim Bouzid1
1Department of Mechanical Engineering, École de Technologie Supérieure, 1100 Notre-Dame Ouest, Montreal, QC H3C 1K3, Canada.
Materials (Basel, Switzerland)
|January 25, 2025
概括
部件的度显著影响螺栓式联接在循环负荷下自放松. 了解这种关系,特别是在不同的材料和抓柄长度,是防止紧力损失和提高关节可靠性的关键.
科学领域:
- 机械工程 机械工程
- 材料科学 材料科学 材料科学
- 部落学 (tribology) 是一个学科.
背景情况:
- 螺栓连接对于各种行业的组件组装至关重要.
- 在螺栓接头中自放松导致紧力损失,损害结构完整性.
- 之前的研究主要集中在组件刚度上,对其在横向循环负荷下自我松动的作用进行了有限的探索.
研究的目的:
- 为了研究元件刚度对受横向循环负荷的螺栓接头自松动行为的影响.
- 分析固成员材料和厚度的变化如何影响自放松过程.
- 为设计具有增强抗松动的螺栓连接提供见解.
主要方法:
- 一个实验设置被设计成模拟自放松在循环横移下.
- 测试使用钢和高密度聚乙烯 (HDPE) 紧的成员进行了测试,抓地长度各不相同.
- 监测的关键参数包括螺栓轴负荷,横向力,相对位移和螺栓与螺母之间的旋转.
主要成果:
- 发现组件的度会影响螺栓接头的自放松率和图案.
- 不同的材料类型 (钢与HDPE) 和抓柄长度对松动有不同的影响.
- 所有测试都显示了II阶段或旋转松动,导致完全的预负载损失.
结论:
- 组件的刚性是影响螺栓关节在横向循环负荷下自放松的关键因素.
- 这项研究强调了在关节设计中考虑材料特性和抓柄长度对于松动阻力的重要性.
- 这些发现有助于更好地了解松动机制,并为开发更可靠的螺栓接头设计提供信息.
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