装载角度对支柱螺丝松动的影响:体外研究
Fei Sun1, Li-Bing Xu1, Zeng Lin1
1School of Mechanical Engineering and Automation, Northeastern University, Shenyang, Liaoning, China.
Clinical implant dentistry and related research
|December 4, 2024
概括
较小的缩支柱螺丝在牙科植入物中提供更好的抗松动性. 增加的外部负载角度会对螺丝稳定性产生负面影响,增加应力和张力.
科学领域:
- 生物材料科学 生物材料科学
- 牙科植入物学 牙科植入物学
- 机械工程 机械工程
背景情况:
- 支柱螺丝松动是影响牙植入物的寿命的一个普遍问题.
- 优化生物机械性能对于成功的长期牙植入物结果至关重要.
研究的目的:
- 为了研究支柱螺丝设计对松动的影响.
- 为了评估外部负载角度的变化对支柱螺丝稳定性的影响.
主要方法:
- 制造和测试具有不同角 (30°,60°,90°,180°) 的支柱螺丝.
- 动态松动测试在不同的负载角度 (15°,30°,45°) 进行.
- 用有限元分析 (FEA) 来评估应力和应变分布.
主要成果:
- 带有较小收缩的支柱螺丝显示出更高的松动扭矩值.
- 较大的形支柱螺丝实现了更高的预装载.
- 增加的负载角度与减小的松动扭矩和增加的螺丝应力/应变相关.
结论:
- 较小的缩支柱螺丝显示出更强的抗松动性.
- 较高的外部负载角度显著降低了支柱螺丝的抗松动性能.
相关概念视频
01:17Frictional Forces on Screws
1.1K
Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
1.1K
01:16Self-Locking Screw
1.5K
A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
1.5K