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相关概念视频

Unsymmetric Loading of Thin-Walled Members: Problem Solving01:07

Unsymmetric Loading of Thin-Walled Members: Problem Solving

467
The shear center of a channel section with uniform thickness, height, and width, is determined by computing the shear force in the member and calculating the moments of inertia of the sections.
To compute the shear forces, find the shear flow at a specific distance from the endpoint using the vertical shear and the moment of inertia values. The total shear force on the flange is calculated by integrating the shear flow from one end of the flange to the other.
Next, calculate the moments of...
467
Unsymmetric Loading of Thin-Walled Members01:23

Unsymmetric Loading of Thin-Walled Members

380
Thin-walled members with non-symmetrical cross-sections are vital to engineering structures, offering material efficiency and structural integrity. However, unsymmetrical loading on these members leads to complex stress distributions, resulting in simultaneous bending and twisting can cause deformation or structural failure. The interaction between bending and twisting requires detailed analysis to ensure structural resilience.
The concept of the shear center is crucial in countering the...
380
Thin-Walled Hollow Shafts01:15

Thin-Walled Hollow Shafts

514
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution of...
514

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Operation of the Collaborative Composite Manufacturing CCM System
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一种基于欧勒图的路径规划方法,用于增材制造连续纤维增强热塑性复合材料的薄壁细胞结构.

Guocheng Liu1,2, Fei Wang1,2, Qiyong Tu1,2

  • 1Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430074, China.

Polymers
|December 11, 2025
PubMed
概括

连续纤维增强热塑性复合材料 (CFRTPC) 的增材制造通过一种新的路径规划方法得到了改进. 这种技术避免了丝材的切割和利的转,提高了最终部件的机械性能.

关键词:
通过3D打印打印3D打印.欧勒图是欧勒的图形.碳纤维碳纤维的使用蜂中的蜂蜜路径规划路径规划路径规划

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科学领域:

  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程
  • 添加剂制造 添加剂制造 添加剂制造

背景情况:

  • 连续纤维增强热塑性复合材料 (CFRTPCs) 对薄壁细胞结构有价值.
  • 增材制造 (AM) 提供了高效的制造,但面临着光纤切割和路径诱导的缺陷的挑战.

研究的目的:

  • 为CFRTPCs的AM开发一种新的路径规划方法.
  • 为了解决印制过程中丝跳跃,扭曲,折叠和断裂的问题.

主要方法:

  • 提出了一种基于欧勒图的路径规划方法.
  • 使用双边形将非欧勒图转换为欧勒图.
  • 一个具有伪交叉点的优化Hierholzer算法产生了连续的,不交叉的路径,最大限度地减少了的转.

主要成果:

  • 优化的Hierholzer算法显著降低了平均转角度高达20.88%.
  • 转次数≤120°增加了高达26.67%,表明更光滑的路径.
  • 使用定制机器人辅助的AM设备,生成的路径被成功验证了.

结论:

  • 提出的基于欧勒图的路径规划方法有效地改善了CFRTPC的AM过程.
  • 这种方法通过避免关键的打印缺陷来提高AM部件的质量和机械完整性.
  • 这项研究表明,复杂复合结构的无缺陷增材制造是一个可行的解决方案.