在非线性几何学中,空隙对标准狗骨模型与最终用户组件的机械性能的影响的定量评估
Yasaman Mohseni1,2, Sinduja Suresh1,2,3,4, Marie-Luise Wille1,2,3,5
1School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
Polymers
|April 12, 2025
概括
空隙位置显著影响3D打印零件的性能. 减少复杂形状的空隙比简单的狗骨模型更能提高机械性能,突出了增材制造的关键设计考虑因素.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 增材制造 增材制造 增材制造
背景情况:
- 增材制造 (AM) 可以实现复杂的设计,但受到空洞等缺陷的阻碍.
- 空隙对机械性能产生负面影响,限制了AM的广泛采用.
- 了解空隙特性对于优化AM工艺和材料性能至关重要.
研究的目的:
- 量化分析空隙特征 (体积分数,分布,尺寸) 与机械性能之间的关系.
- 为了比较这些关系在线性 (狗骨) 和非线性 (最终用途组件) 几何学.
- 为了研究空隙位置对3D打印零件机械反应的影响.
主要方法:
- 样品使用合丝制造 (FFF) 制造,并控制重叠水平以改变空隙含量.
- 在体积分数,分布和大小方面分析了空隙特征.
- 测量了线性和非线性几何体的机械性能 (例如,弹性模量,整体响应).
主要成果:
- 越来越多的重叠减少了空洞从大间隙到更小的点状缺陷.
- 在非线性几何学 (12%到2%) 中的空隙缩小产生了三倍的机械改进.
- 狗骨样本中空隙减少 (12%~0%) 的弹性模量只提高了1.5倍.
- 空隙分布,影响了非线性部分的边缘和内部层,严重影响了结构完整性.
结论:
- 空隙位置是决定3D打印组件机械性能的一个关键因素.
- 在复杂的非线性几何学中,线性狗骨模型可能无法准确地表示空洞属性关系.
- 为最终使用组件优化AM,需要仔细考虑空隙分布,以及体积分数和尺寸.
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